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2606.09805 2026-06-09 quant-ph 新提交

On the viability of Transatlantic Quantum Entanglement Distribution using Combined Satellite and Stratospheric Relay Nodes

利用卫星与平流层中继节点组合实现跨大西洋量子纠缠分布的可行性研究

Kimia Mohammadi, Paul J. Godin, Thomas Jennewein

AI总结 研究利用低轨卫星与平流层高海拔平台(HAP)上的被动光学中继,在6500公里地面距离上实现跨大西洋量子纠缠分布,混合架构可提供最高纠缠分布速率,年安全密钥量约5×10^6比特。

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AI中文摘要

为了探索建立全球量子网络的途径,我们研究了在6500公里地面距离上实现跨大西洋量子纠缠分布的几种链路架构。我们定义了涉及卫星和平流层高海拔平台(HAP)的自由空间链路配置,使用当今技术且不依赖量子存储器和中继器。考虑链路预算、空间辐射、轨道特性和系统复杂性,我们发现由位于低地球轨道(LEO)卫星上的纠缠光子源与两个位于HAP上的被动光学中继组成的混合架构提供了总体最高的纠缠分布速率。此外,卫星-HAP架构在有效载荷设计和发射要求方面具有实际优势,并且假设HAP具有一定的机动性,能够降低与天气相关的链路中断。总体而言,这种混合配置使用30厘米孔径地面接收器每年可产生约5×10^6个安全密钥比特,比使用单个MEO卫星和1米孔径地面接收器所能达到的高出近两个数量级。我们的结果突出了混合卫星-HAP架构的主要优势,即降低系统复杂性,同时实现可扩展且更易访问的长距离量子通信网络。

英文摘要

To explore the pathways toward establishing a global quantum network, we investigate several link architectures for transatlantic quantum entanglement distribution over a 6,500 km ground distance. We define free-space link configurations involving satellites and stratospheric high altitude platforms (HAPs), using today's technology and without relying on quantum memories and repeaters. Considering link budgets, space radiation, orbital characteristics, and system complexity we find that a hybrid architecture consisting of an entangled photon source located on a low Earth orbit (LEO) satellite supported by two passive optical relays located on HAPs provides the overall highest entanglement distribution rate. In addition, the satellite HAP architecture offers practical advantages in payload design and launch requirements, and the ability to lower the weather-related link interruptions assuming some maneuverability of HAPs. Overall, this hybrid configuration yields on the order of 5X10^6 secure key bits per year using 30 cm aperture ground receivers, nearly two orders of magnitude higher than achievable with a single MEO satellite and 1 m aperture ground receivers. Our results highlight the major benefits of hybrid satellite HAP architectures by reducing system complexity while enabling scalable and more accessible long-range quantum communication networks.

2606.09804 2026-06-09 astro-ph.CO gr-qc hep-ph 新提交

Universal Suppression of Gravitational Waves from Black Hole Evaporation Dynamics

黑洞蒸发动力学对引力波的普适抑制

Xin-Chen He, Xiao-Han Ma, Misao Sasaki, Volodymyr Takhistov

AI总结 研究黑洞质量分布有限宽度导致引力波谱在晚期呈现普适幂律抑制,揭示其与蒸发动力学的直接联系,并在原初黑洞场景中得到验证。

Comments 5-page Letter + Supplemental Material (12 pages total); 2 figures

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AI中文摘要

蒸发的黑洞可以在引力波背景上留下独特的印记。我们表明,具有有限宽度质量分布的黑洞群体表现出由蒸发动力学而非初始质量分布细节决定的普适晚期演化,导致诱导引力波的特征幂律抑制。我们通过原初黑洞场景中早期宇宙物质主导时期的一类广泛质量函数证明了这一点,并识别出临界坍缩分布中发现的PBH诱导引力波抑制是这一普遍现象的表现。我们的结果建立了渐近引力波谱与黑洞蒸发基本定律之间的直接联系。

英文摘要

Evaporating black holes can leave distinct imprints on gravitational wave (GW) backgrounds. We show that black hole populations with finite width mass distributions exhibit a universal late time evolution governed by the evaporation dynamics rather than the details of the initial mass distribution, leading to a characteristic power law suppression of the induced GWs. We demonstrate this for a broad class of mass functions in primordial black hole (PBH) scenarios featuring an early Universe matter-dominated era, and identify the suppression of PBH-induced GWs found for critical collapse distributions as a manifestation of this general phenomenon. Our results establish a direct connection between the asymptotic GW spectrum and the underlying law of black hole evaporation.

2606.09801 2026-06-09 math.CO cs.DM 新提交

On the generalized Turán number of complete bipartite graphs

关于完全二部图的广义Turán数

Oliver Janzer, Sean Longbrake, Liana Yepremyan

AI总结 本文证明了当s∈{2,3}且s<a≤b且t足够大时,ex(n,K_{a,b},K_{s,t})=Θ(n^s),并证明了对于任意含边图F,存在无穷多个实数r使得ex(n,F,H)=Θ(n^r)对某个H成立。

Comments 17 pages

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AI中文摘要

对于图$F$和$H$,广义Turán数$\mathrm{ex}(n,F,H)$表示在$n$个顶点且不含$H$的图中$F$的最大拷贝数。我们证明,如果$s\in \{2,3\}$,$s< a\leq b$且$t$足够大,则$\mathrm{ex}(n,K_{a,b},K_{s,t})=Θ(n^s)$。该结果中$s=2$、$a=b=3$的情形回答了Spiro的一个问题。\n证明Spiro的另一个猜想,我们证明对于每个至少有一条边的图$F$,存在无穷多个实数$r$使得$\mathrm{ex}(n,F,H)=Θ(n^r)$对某个图$H$成立。

英文摘要

For graphs $F$ and $H$, the generalized Turán number $\mathrm{ex}(n,F,H)$ denotes the maximum number of copies of $F$ in an $H$-free graph on $n$ vertices. We prove that if $s\in \{2,3\}$, $s< a\leq b$ and $t$ is sufficiently large, then $\mathrm{ex}(n,K_{a,b},K_{s,t})=Θ(n^s)$. The $s=2$, $a=b=3$ case of this result answers a question of Spiro. Proving another conjecture of Spiro, we show that for every graph $F$ with at least one edge, there exist infinitely many real numbers $r$ such that $\mathrm{ex}(n,F,H)=Θ(n^r)$ holds for some graph $H$.

2606.09797 2026-06-09 cond-mat.supr-con 新提交

Proximity-induced orbital antiferromagnetism in Ising superconductors

伊辛超导体中的近邻诱导轨道反铁磁性

G. A. Bobkov, V. A. Bobkov, T. Karabassov, I. V. Bobkova, A. A. Golubov

AI总结 预测超导体/反铁磁异质结中伊辛自旋-轨道耦合导致的新型超导态:近邻诱导轨道反铁磁性,其序参量具有周期性相位调制,产生原子尺度的环流。

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AI中文摘要

我们预测了具有伊辛自旋-轨道耦合的超导体/反铁磁异质结中一种全新的超导态:近邻诱导轨道反铁磁性。在这种状态下,序参量获得锁定到磁晶格的周期性相位调制,在相邻晶胞中产生具有相反轨道矩的原子尺度环流。它的出现要求每个晶胞至少有三个非等价磁子格和有限的自旋-轨道耦合。以NbSe$_2$/MnPS$_3$为具体例子,我们结合第一性原理和Bogoliubov-de Gennes计算,证明近邻诱导的交换场导致稳健的相位调制。与FFLO态和螺旋态不同,相位梯度是原子尺度的,该态携带电流,并在整个参数范围内保持独特的稳定性。该态表现为局域态密度中特征性的有限能量凹陷,可通过STM观测。

英文摘要

We predict a fundamentally new superconducting state in superconductor/antiferromagnet heterostructures with Ising spin--orbit coupling: proximity-induced orbital antiferromagnetism. In this state, the order parameter acquires a periodic phase modulation locked to the magnetic lattice, generating atomic-scale loop currents with opposite orbital moments on neighboring unit cells. Its emergence requires at least three nonequivalent magnetic sublattices per unit cell and finite spin--orbit coupling. Using NbSe$_2$/MnPS$_3$ as a concrete example, we combine first-principles and Bogoliubov--de Gennes calculations to demonstrate that the proximity-induced exchange field leads to robust phase modulation. Unlike FFLO and helical states, the phase gradient is atomic-scale, the state is current-carrying, and it remains uniquely stable over the full parameter range. The state manifests as characteristic finite-energy dips in the local density of states, accessible by STM.

2606.09796 2026-06-09 math.CT 新提交

Actions, semidirect products and crossed semimodules in the category of small categories with a fixed set of objects

固定对象集的小范畴范畴中的作用、半直积和交叉半模

Stefano Ambra

AI总结 将幺半群的作用和半直积推广到以对象集为纤维的范畴纤维上,证明Schreier点与作用之间的伴随在幺半群情形下等价,并建立Schreier内范畴与交叉半模之间的伴随。

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AI中文摘要

我们将幺半群的作用和半直积的经典概念推广到纤维化 $\mathcal{O}\colon\mathbf{Cat}\rightarrow\mathbf{Set}$ 的纤维上,其中 $\mathcal{O}$ 将小范畴 $\mathbb{X}$ 映射到其对象集 $X_0=ob(\mathbb{X})$。我们证明了幺半群 $Y$ 的幺半群作用与 $Y$ 上的Schreier分裂扩张之间的等价性(该等价性众所周知地推广了群的作用与分裂扩张之间的等价性)是纤维 $\mathcal{O}^{-1}(B)$ 中Schreier点与作用之间的更广泛伴随的一个实例。这个伴随当且仅当 $B=1$(即对于幺半群范畴 $\mathbf{Mon}$)时是等价。类似地,我们证明了在纤维 $\mathcal{O}^{-1}(B)$ 中,Schreier内范畴与 $\mathcal{O}^{-1}(B)$ 中的交叉半模范畴之间存在一个伴随(在幺半群情形下,该伴随由Patchkoria得到已知等价)。后者是通过将 $\mathbf{Mon}$ 中的交叉半模概念翻译到 $\mathcal{O}^{-1}(B)$ 中定义的。最后,我们证明,通过适当定义交叉模,最后一个伴随在 $\mathcal{O}$ 的纤维中给出了交叉模与Schreier内群胚之间的等价。

英文摘要

We generalize to the fibres of the fibration $\mathcal{O}\colon\mathbf{Cat}\rightarrow\mathbf{Set},$ defined by mapping a small category $\mathbb{X}$ to its set of objects $X_0=ob(\mathbb{X}),$ the classical notions of action and semidirect product of monoids. We prove that the equivalence between monoid actions of a monoid $Y$ and Schreier split extensions on $Y,$ which is well known to generalize the equivalence between actions and split extensions for groups, is an instance of a broader adjunction between Schreier points and actions in the fibres $\mathcal{O}^{-1}(B).$ This adjunction is an equivalence if and only if $B=1,$ i.e., for the category $\mathbf{Mon}$ of monoids. Similarly, we prove that there is an adjunction (which, in the case of monoids, results in a known equivalence due to Patchkoria) between Schreier internal categories in the fibres $\mathcal{O}^{-1}(B)$ and the category of crossed semimodules in $\mathcal{O}^{-1}(B).$ The latter are defined by translating in $\mathcal{O}^{-1}(B)$ the notion of crossed semimodule in $\mathbf{Mon}.$ Eventually, we prove that, by defining crossed modules appropriately, this last adjunction yields an equivalence between crossed modules and Schreier internal groupoids in the fibres of $\mathcal{O}.$

2606.09795 2026-06-09 math.CO cs.IT cs.NA hep-th math-ph math.IT math.MP math.NA 新提交

Finite-n Estimate of Dedekind Numbers by Layer-Ratio Monte Carlo

通过层比蒙特卡洛方法对戴德金数的有限n估计

Tian-Shun Chen, Hao Feng, Haozhe Wang, Kilar Zhang

AI总结 将戴德金数问题转化为布尔格理想格的层比重建问题,利用可逆固定层马尔可夫链估计层比,从而估计戴德金数M(n),并发现n=9时中心层附近存在双肩特征。

Comments 27 pages, 6 figures, 7 tables

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AI中文摘要

戴德金问题计数单调布尔函数,等价于布尔格的下集。我们将此枚举重新表述为秩理想格的惠特尼数的有限层比重建问题。精确的相邻层双重计数通过可加元素数和可移除元素数的局部平均值表达每个层比。可逆固定层马尔可夫链估计这些平均值,从而估计戴德金数M(n)。在M(8)和M(9)上的回测校准了固定协议下的种子级变异性,并测量了观察到的蒙特卡洛预算缩放。所得估计探测了理想格的惠特尼数序列。尽管这些行先前被经验描述为单峰的,但高精度n=9估计在中心秩附近有一个浅的双肩特征,与经验描述相反;n=11和n=13中心窗口估计显示出更大对比度的类似模式。M(10)的协议估计为\\[ \widehat M(10)=(8.9360\pm0.0010)\times 10^{78}, \\] 其中显示的不确定性是生产预算下跨n缩放定律的基于预算的预测尺度。

英文摘要

Dedekind's problem counts monotone Boolean functions, equivalently downsets of a Boolean lattice. We recast this enumeration as a finite layer-ratio reconstruction problem for the Whitney numbers of the ranked ideal lattice. An exact adjacent-layer double count expresses each layer ratio through local averages of the number of addable elements and the number of removable elements. Reversible fixed-layer Markov chains estimate these averages and hence estimate the Dedekind number M(n). Backtests at M(8) and M(9) calibrate seed-level variability under the fixed protocol and measure the observed Monte Carlo budget scaling. The resulting estimate probes the Whitney-number sequence of the ideal lattice. Although these rows have previously been described empirically as unimodal, the high-precision n=9 estimate has a shallow two-shoulder feature around the central rank, contrary to that empirical description; n=11 and n=13 center-window estimates show a larger-contrast analogous pattern. The protocol estimate for M(10) is \[ \widehat M(10)=(8.9360\pm0.0010)\times 10^{78}, \] where the displayed uncertainty is the budget-based forecast scale from the cross-n scaling law under the production budget.

2606.09793 2026-06-09 physics.ao-ph 新提交

Deep learning reveals a stronger fossil fuel influence than biomass burning in shaping remote tropospheric ozone

深度学习揭示化石燃料对偏远地区对流层臭氧的影响比生物质燃烧更强

Chaoqun Ma, Hang Su, Yafang Cheng

AI总结 针对示踪剂方法高估生物质燃烧对偏远地区臭氧贡献的问题,提出深度学习框架结合观测与模型,发现化石燃料贡献是生物质燃烧的三倍以上。

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AI中文摘要

对流层臭氧(O3)是一种关键的温室气体和大气氧化剂,但其在偏远对流层的来源仍存在激烈争论。基于观测的示踪剂分析表明,归因于生物质燃烧的臭氧远大于化石燃料来源(约2-10倍),这与最先进的全球模型相矛盾。在这里,我们表明这种差异主要源于示踪剂方法对示踪剂寿命差异的强敏感性,特别是在经过长距离输送到偏远地区之后。为了解决这一矛盾,我们开发了一个深度学习(DL)框架,综合全球观测和化学传输模型模拟。DL方法准确推断源贡献,并揭示化石燃料排放对偏远对流层臭氧的贡献是生物质燃烧的三倍以上。我们的发现强调,淘汰化石燃料仍然是减轻偏远对流层臭氧的最有力杠杆。

英文摘要

Tropospheric ozone (O3) is a key greenhouse gas and atmospheric oxidant, yet its sources in the remote troposphere remain strongly debated. Observation-based tracer analyses suggest that O3 attributed to biomass burning is much greater than that from fossil fuel sources (by a factor of ~2-10), contradicting state-of-the-art global models. Here we show that this discrepancy primarily arises from the strong sensitivity of tracer methods to differences in tracer lifetimes, especially after extended transport to the remote regions. To resolve this discrepancy, we develop a deep learning (DL) framework that synthesizes global observations and chemical transport model simulations. The DL approach accurately infers source contributions and reveals that fossil fuel emissions contribute over three times more O3 to the remote troposphere than biomass burning. Our findings underscore that phasing out fossil fuels remains the most powerful lever for mitigating remote tropospheric ozone.

2606.09791 2026-06-09 hep-lat cond-mat.str-el hep-th 新提交

Certified spectral functions from lattice Monte Carlo data

来自晶格蒙特卡洛数据的认证谱函数

Sophie Mutzel, Antoine Tilloy

AI总结 提出一种通过半定规划松弛从晶格蒙特卡洛数据中严格计算谱函数线性泛函界限的方法,具有强收敛保证和误差控制。

Comments 10+3 pages, 4 figures

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AI中文摘要

蒙特卡洛方法应用于晶格量子场论,可以获取具有良好理解误差的欧几里得相关函数。恢复人们关心的可观测量,如谱密度,需要解决一个不适定的逆问题,通常通过启发式方法处理,但失去了对误差的严格控制。我们不试图找到“最佳”谱密度 $ρ(ω)$,而是问给定蒙特卡洛数据和晶格作用的反射正性,其线性泛函 $\int_{\mathbb{R}^+} G(ω) ρ(ω) \mathrm{d} ω$ 可以有多小或多大。这是一个凸但无限维的问题。我们展示了如何将其对偶严格松弛为一个有限半定规划层次结构,可用标准求解器求解并具有强收敛保证。即使松弛不紧,所得界限也是严格的,并迅速收敛到误差完全由蒙特卡洛统计主导的区域。该方法还通过不可行性证书标记不可信的蒙特卡洛数据,例如低估的误差条。我们在二维晶格 $ϕ^4$ 理论上进行了演示。

英文摘要

The Monte Carlo method, applied to lattice quantum field theory, gives access to Euclidean correlation functions with well-understood error bars. Recovering the observables one cares about, such as the spectral density, requires solving an ill-posed inverse problem, usually tackled with heuristics that lose rigorous control of the error. Instead of trying to find the ``best'' spectral density $ρ(ω)$, we ask how small or large linear functionals $\int_{\mathbb{R}^+} G(ω) ρ(ω) \mathrm{d} ω$ of it can be, given the Monte Carlo data and the reflection positivity of the lattice action. This is a convex but infinite-dimensional problem. We show how its dual can be rigorously relaxed into a hierarchy of finite semidefinite programs, solvable with standard solvers and enjoying strong convergence guarantees. The resulting bounds are rigorous even when the relaxation is not tight, and converge quickly to the regime where the error is entirely dominated by Monte Carlo statistics. The method also flags implausible Monte Carlo data, for instance underestimated error bars, through an infeasibility certificate. We demonstrate it on lattice $ϕ^4$ theory in two dimensions.

2606.09790 2026-06-09 quant-ph 新提交

Operation Mpemba effect: Breakdown of resource-Markovianity of free dynamics

操作姆潘巴效应:自由动力学资源马尔可夫性的破坏

Tian-Ren Jin, Yu-Ran Zhang, Heng Fan

AI总结 提出资源马尔可夫性概念,将姆潘巴效应操作性地定义为弛豫操作破坏资源马尔可夫性,实现度量无关的操作性表征,并基于资源非马尔可夫性度量给出定量刻画。

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AI中文摘要

姆潘巴效应指的是初始远离平衡的状态反而更快弛豫的现象,但其表征通常依赖于选定的距离或资源度量。我们将资源马尔可夫性引入量子资源理论,作为量子马尔可夫性的扩展概念,并将资源姆潘巴效应操作性地定义为弛豫操作破坏资源马尔可夫性。这为一般资源理论中的资源姆潘巴效应提供了与度量无关的操作性表征,同时基于资源非马尔可夫性度量给出了定量刻画。我们通过状态可区分性的姆潘巴效应(因其与量子马尔可夫性的关联)以及从操作视角的热主导姆潘巴效应来阐述该框架。这些结果揭示了量子资源、非马尔可夫性和姆潘巴效应之间的深层相互作用。

英文摘要

The Mpemba effect refers to faster relaxation of states that are initially farther from equilibrium, yet its characterization is often tied to a chosen distance or resource measure. We introduce resource-Markovianity, an extended concept of quantum Markovianity to quantum resource theories, and formulate the resource Mpemba effect operationally as the breaking of resource-Markovianity by a relaxation operation. This yields a measure-independent operational characterization of resource Mpemba effects in general resource theories, together with quantitative characterizations based on resource-non-Markovianity measures. We illustrate the framework with the Mpemba effect for distinguishability of states, due to its relation to quantum Markovianity, and with the thermomajorization Mpemba effect from an operational perspective. These results reveal a deep interplay between quantum resources, non-Markovianity, and the Mpemba effect.

2606.09789 2026-06-09 cs.CY 新提交

Principled Uncertainty in Clinical AI: End-to-End Bayesian Modelling and Algorithmic Equity Auditing Across Multimodal Patient Data

临床AI中的原则性不确定性:跨多模态患者数据的端到端贝叶斯建模与算法公平审计

Oladimeji Anthonio, Dimeji Abdulsobur Olawuyi, Oloruntoba Ajayi, Temiloluwa Aderemi, Joseph Odamo

AI总结 提出端到端贝叶斯不确定性建模框架,结合校准不确定性作为公平性度量,在模拟患者数据中识别出初级/农村设施和低社会经济地位患者的认知不确定性公平差距。

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AI中文摘要

临床人工智能(AI)系统在缺乏原则性不确定性量化的情况下常规生成预测,限制了其在高风险医疗环境中的可信度。本文提出一个综合研究计划,解决两个相互关联的问题:(1)开发一个完全端到端的贝叶斯不确定性建模框架,用于多模态临床数据;(2)将校准的不确定性估计作为跨患者亚组算法公平性的正式度量。我们构建了一个概率深度学习架构,包括特定模态的变分编码器、精度加权后期融合机制以及一个分离偶然不确定性和认知不确定性的分解不确定性输出头。该系统使用复合贝叶斯损失进行训练,包括二元交叉熵、Kullback-Leibler散度正则化和不确定性校准惩罚。我们使用期望校准误差(ECE = 0.096)评估模型校准,并在1000名模拟患者的数据集上,按设施类型、社会经济地位、年龄组和生理性别进行亚组公平审计。结果表明,认知不确定性系统地识别出服务不足的人群:初级/农村设施患者表现出15.3%的不确定性公平差距(p < 0.001,效应量 = 0.698),低社会经济地位患者表现出6.8%的差距(p < 0.001),老年患者表现出3.9%的差距(p < 0.001),而未检测到显著的性别差异。这些发现表明,校准不确定性不仅是概率模型的技术属性,而且是一种具有直接临床相关性的可操作公平信号。

英文摘要

Clinical artificial intelligence (AI) systems routinely produce predictions without principled quantification of uncertainty, limiting their trustworthiness in high-stakes medical environments. This paper presents an integrated research programme addressing two interconnected problems: (1) the development of a fully end-to-end Bayesian uncertainty modelling framework for multimodal clinical data, and (2) the application of calibrated uncertainty estimates as a formal measure of algorithmic equity across patient subgroups. We construct a probabilistic deep learning architecture comprising modality-specific variational encoders, a precision-weighted late fusion mechanism, and a decomposed uncertainty output head that separates aleatoric from epistemic uncertainty. The system is trained with a composite Bayesian loss incorporating binary cross-entropy, Kullback-Leibler divergence regularisation, and an uncertainty calibration penalty. We evaluate model calibration using Expected Calibration Error (ECE = 0.096) and conduct a subgroup equity audit across facility type, socioeconomic status, age group, and biological sex on a dataset of 1,000 simulated patients. Results demonstrate that epistemic uncertainty systematically identifies underserved populations: primary/rural facility patients show a 15.3% uncertainty equity gap (p < 0.001, effect size = 0.698), low socioeconomic status patients exhibit a 6.8% gap (p < 0.001), and elderly patients show a 3.9% gap (p < 0.001), whilst no significant sex-based disparity is detected. These findings establish that calibrated uncertainty is not merely a technical property of probabilistic models but constitutes an actionable equity signal with direct clinical relevance.

2606.09786 2026-06-09 gr-qc astro-ph.HE 新提交

Neutron stars in Poincaré gauge gravity with quadratic torsion

庞加莱规范引力中具有二次挠率的中子星

Chaitanya Vashistha, Radouane Gannouji, Apratim Ganguly

AI总结 研究庞加莱规范引力中具有宇称偶和奇二次挠率不变量的静态中子星,通过代数求解挠率得到有效流体修正的TOV方程,发现正有效自旋-自旋耦合使星体更致密、最大质量降低。

Comments 29 pages, 2 figures

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AI中文摘要

我们在庞加莱规范引力的一个代数扇区中研究静态中子星,该扇区包含宇称偶和宇称奇的二次挠率不变量。由于挠率不传播,挠率方程是代数的,并可以自旋流的形式求解。对于满足Frenkel条件的Weyssenhoff流体,度规场方程简化为由包含自旋平方修正的有效流体驱动的普通黎曼爱因斯坦方程。我们推导了有效能量密度、径向压力和切向压力,允许各向同性和各向异性的自旋关联。与爱因斯坦-卡坦理论相比,有效自旋-自旋相互作用的系数不是固定的,而是依赖于无量纲的二次挠率耦合。在爱因斯坦-卡坦极限下,使用应力-能量张量的度规定义,非极化自旋贡献给出$w_{\mathrm{spin}}=-1/3$。然后我们推导相应的修正Tolman-Oppenheimer-Volkoff方程,并使用DD2状态方程进行数值求解。对于这里考虑的正有效自旋-自旋耦合分支,挠率修正使恒星构型更致密,降低最大质量,并相对于广义相对论序列减少结合能。对于所考虑的平滑弱极化轮廓,自旋关联各向异性对质量-半径关系的影响可忽略。

英文摘要

We study static neutron stars in an algebraic sector of Poincaré gauge gravity with parity-even and parity-odd quadratic torsion invariants. Since torsion is non-propagating, the contorsion equation is algebraic and can be solved in terms of the spin current. For a Weyssenhoff fluid satisfying the Frenkel condition, the metric field equations reduce to ordinary Riemannian Einstein equations sourced by an effective fluid containing spin-squared corrections. We derive the effective energy density, radial pressure, and tangential pressure, allowing both isotropic and anisotropic spin correlations. In contrast with Einstein--Cartan theory, the coefficient of the effective spin-spin interaction is not fixed, but depends on the dimensionless quadratic-torsion couplings. In the Einstein--Cartan limit, using the metric definition of the stress-energy tensor, the unpolarized spin contribution gives $w_{\mathrm{spin}}=-1/3$. We then derive the corresponding modified Tolman--Oppenheimer--Volkoff equations and solve them numerically using the DD2 equation of state. For the positive effective spin-spin coupling branch considered here, the torsion correction makes the stellar configurations more compact, lowers the maximum mass, and reduces the binding energy relative to the general-relativistic sequence. For the smooth weak-polarization profiles considered, spin-correlation anisotropy has only a negligible effect on the mass--radius relation.

2606.09784 2026-06-09 math.OC math.PR 新提交

Mean field games with option to buy information

具有购买信息选项的平均场博弈

Bernardo D'Auria, Markus Fischer

AI总结 研究连续时间有限时域平均场博弈,其中代表性玩家的目标函数依赖于隐藏状态,玩家可选择付费观察该状态,通过连接最优控制与自由停止模型给出解的表征和显式示例。

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AI中文摘要

我们引入了一类连续时间有限时域平均场博弈,其中代表性玩家的目标函数除了依赖于位置、控制和总体分布外,还依赖于一个隐藏状态。在作用于位置动态的同时,代理人有选项付费观察隐藏状态。我们将模型的原始公式与具有自由停止的最优控制平均场模型联系起来,刻画解的特征,并给出一个简单可显式求解的例子。对于一类具有兼容信息结构的$N$人博弈,我们证明可以从极限模型的解出发构造近似纳什均衡。

英文摘要

We introduce a class of continuous time finite horizon mean field games where the objective function of the representative player depends on a hidden state, in addition to position, control, and the population distribution. While acting on the position dynamics, the agent has the option to pay for seeing the hidden state. We connect the original formulation of our model with a mean field model of optimal control with discretionary stopping, characterize solutions, and give a simple explicitly solvable example. For a class of $N$-player games with compatible information structure, we show that approximate Nash equilibria can be constructed starting from a solution to the limit model.

2606.09783 2026-06-09 math.FA 新提交

On some geometrization of compact metric spaces: A solution to the Banach-Ulam conjecture

关于紧度量空间的某种几何化:Banach-Ulam 猜想的一个解

Grzegorz Tomkowicz

AI总结 提出基于Banach和Mycielski思想的紧度量空间几何化方法,证明了Banach-Ulam猜想:每个紧度量空间存在有限可加、合同不变的测度,并解决了Talagrand问题。

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AI中文摘要

我们提出了一种基于S. Banach和J. Mycielski思想的紧度量空间几何化方法。然后证明了1935年S. Banach和S. Ulam的如下猜想:在每个紧度量空间中,存在一个有限可加的概率测度,在合同变换下不变。此外,我们的技术使我们能够解决M. Talagrand的一个问题,该问题与Marczewski问题和Banach-Tarski悖论有关,其中碎片具有Baire性质。我们还给出了关于Hilbert立方体中乘积Lebesgue测度的Ulam猜想的一个非常简单的证明,并用我们的几何化语言解释了关于合同不变Borel测度的现有结果。

英文摘要

We propose a geometrization of compact metric spaces that is based on ideas of S. Banach and J. Mycielski. Then we prove the following conjecture of S. Banach and S. Ulam from 1935: in every compact metric space there exists a finitely additive probability measure, invariant under congruences. Moreover, our techniques allow us to solve a problem of M. Talagrand related to the Marczewski problem and the Banach-Tarski paradox with pieces having the property of Baire. We give also a very simple proof of the conjecture of Ulam about the product Lebesgue measure in the Hilbert cube and explain the existing results about congruence-invariant Borel measures in the language of our geometrization.

2606.09782 2026-06-09 cs.HC 新提交

Cohort-based Semantic Labeling: AI-Enabled Recovery of Visualization Semantics from Deployed SVGs

基于分组的语义标注:AI 驱动的从已部署 SVG 中恢复可视化语义

Jeongah Lee, Hima Varshini Surisetty, Durga Nirmaleswaran, Jahnavi Sharma, Srikiran Kavuri, Narges Mahyar, Ali Sarvghad

AI总结 提出 CSL 管道,通过分组分解和混合语义锚定,从 SVG 中自动恢复可视化语义,实现高精度标注。

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AI中文摘要

许多基于网络的可视化以可缩放矢量图形(SVG)形式部署,这种格式忠实地保留了视觉外观,但通常省略了机器解释所需的高层语义结构。一旦渲染和发布,关于可视化组件、角色和编码的信息不再显式可用,限制了查询、可访问性增强、解释、个性化和转换等下游操作。为了解决这一差距,我们引入了 CSL,一个 AI 驱动的多阶段管道,通过两种互补机制从已部署的 SVG 中自动恢复可视化语义:(1)基于分组的分解,将异构 SVG 图元组织成结构上连贯的子集,减少语义分配空间;(2)混合语义锚定,将基于模型的推理与确定性结构验证和传播相结合,使标注既上下文敏感又结构锚定。CSL 生成语义 SVG(SSVG),一种 SVG 元素被标注了图形标记类型、可视化角色和数据角色的表示。我们将 CSL 实现为端到端原型,并在 102 个 SVG 可视化上进行了评估,在标记类型、可视化角色和数据角色恢复上分别达到了 0.822、0.853 和 0.860 的全局宏平均准确率。与非分组的整图基线的消融实验表明,分组显著提高了准确率(配对 t 检验:t > 20,p < 0.001;Cohen's d > 2.0),对随机选择的 SVG 进行 100 次重复标注,三个属性的平均一致性超过 91.9%。这些结果有力证明了 CSL 可以将已部署的 SVG 转换为机器可用的语义表示,从而实现更易访问、自适应和用户可控的可视化系统。

英文摘要

Many web-based visualizations are deployed as Scalable Vector Graphics (SVG), a format that faithfully preserves visual appearance but typically omits the higher-level semantic structure needed for machine interpretation. Once rendered and published, information about a visualization's components, roles, and encodings is no longer explicitly available, limiting downstream operations such as querying, accessibility augmentation, explanation, personalization, and transformation. To address this gap, we introduce CSL, an AI-enabled, multi-stage pipeline for automatically recovering visualization semantics from deployed SVGs through two complementary mechanisms: (1) cohort-based decomposition, which organizes heterogeneous SVG primitives into structurally coherent subsets that reduce the semantic assignment space, and (2) hybrid semantic grounding, which combines model-based inference with deterministic structural validation and propagation to make labeling both context-sensitive and structurally anchored. CSL produces Semantic SVG (SSVG), a representation in which SVG elements are annotated with graphical mark type, visualization role, and data role. We implemented CSL as an end-to-end prototype and evaluated it on 102 SVG visualizations, achieving global macro-averaged accuracies of 0.822 for mark type, 0.853 for visualization role, and 0.860 for data-role recovery. An ablation against a non-cohort whole-chart baseline showed that cohorting significantly improves accuracy (paired t-test: t > 20, p < 0.001; Cohen's d > 2.0), and repeated labeling of a randomly selected SVG over 100 runs yielded mean agreement above 91.9% across all three attributes. These results provide strong evidence that CSL can transform deployed SVGs into machine-usable semantic representations, enabling more accessible, adaptive, and user-steerable visualization systems.

2606.09781 2026-06-09 hep-th gr-qc quant-ph 新提交

Topological defects and scalar field modes in warped geometries

翘曲几何中的拓扑缺陷与标量场模式

A. A. Saharian, E. L. Karapetyan, G. V. Mirzoyan

AI总结 提出一般框架研究翘曲几何背景中拓扑缺陷对量子标量场局域特性的影响,通过分离变量得到模式函数,并应用于共形平坦时空、宇宙弦、整体单极子和AdS翘曲几何等情形。

Comments 16 pages, no figures

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AI中文摘要

我们发展了一个一般框架,用于研究翘曲几何背景中拓扑缺陷对量子标量场局域特性的影响。里奇张量和曲率标量被分解为来自翘曲因子、径向几何和角度缺陷结构的贡献。对于任意曲率耦合参数,场方程被分离为独立的径向、角度和翘曲坐标部分。对于一般的角度亏损参数值,我们得到了归一化模式函数的完备集。该一般形式被应用于几个具体情形,例如共形平坦翘曲时空、广义宇宙弦、整体单极子和反德西特(AdS)型翘曲几何。然后,利用得到的模式函数,我们计算了AdS时空中整体单极子的Hadamard两点函数。

英文摘要

We develop a general framework for investigating the influence of topological defects on the local characteristics of a quantum scalar field in a warped geometry background. The Ricci tensor and curvature scalar are decomposed into contributions from the warp factor, the radial geometry and the angular defect structure. For an arbitrary curvature coupling parameter, the field equation is separated into independent radial, angular and warp-coordinate parts. A complete set of normalized mode functions is obtained for general values of the angular deficit parameters. The general formalism is applied to several specific cases, such as conformally flat warped spacetimes, generalized cosmic strings, global monopoles and anti-de Sitter (AdS)-type warped geometries. The Hadamard two-point function is then evaluated for a global monopole in AdS spacetime using the obtained mode functions.

2606.09779 2026-06-09 hep-ph gr-qc hep-th 新提交

Higher-dimensional operators and Polyakov loop in hot Scalar QED from the heat kernel

热标量QED中来自热核的高维算子和Polyakov圈

Siddhartha Bandyopadhyay, Joydeep Chakrabortty, Debmalya Dey, Philipp Schicho, Tushar

AI总结 利用有限温度热核方法,计算了热标量QED中到维度六的规范不变有效拉格朗日量,并研究了Polyakov圈对匹配系数和相变热力学的影响。

Comments 32 pages, 4 figs

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AI中文摘要

利用有限温度热核方法,我们计算了有质量热标量QED中到维度六的规范不变有效拉格朗日量。我们提出了两种互补的方法:在有限温度下积分掉重模,以及从零温度热核系数推导有限温度热核系数。我们表明,在静态极限下,两者导致相同的三维有效算符。我们还计算了有限温度下恒定背景的规范不变Coleman-Weinberg有效势。我们进一步研究了Polyakov圈如何修改匹配系数,并评估了它连同高维算符对宇宙学一级相变热力学的影响,这反过来可能影响相关的引力波谱。

英文摘要

Using the finite-temperature heat kernel method, we compute the gauge-invariant effective Lagrangian up to dimension-six for massive hot scalar QED. We propose two complementary methods: integrating out heavy modes at finite temperature, and deriving the finite-temperature heat kernel coefficients from the zero-temperature ones. We show that in the static limit, both lead to the same three-dimensional effective operators. We also compute the gauge-invariant Coleman-Weinberg effective potential for a constant background at finite temperature. We further examine how the Polyakov loop modifies the matching coefficients and assess its impact together with the higher-dimensional operators on the thermodynamics of cosmological first-order phase transitions, which in turn can affect an associated gravitational-wave spectrum.

2606.09776 2026-06-09 astro-ph.GA 新提交

Mapping Interstellar Ice Inventory toward Class 0 Protostars in Star-forming Region Orion A with JWST Data

利用JWST数据绘制猎户座A恒星形成区中Class 0原恒星周围的星际冰库存图

Igor Petrashkevich, Yaroslav Pavlyuchenkov, Anna Punanova, Maksim Ozhiganov, Ruslan Nakibov, Varvara Karteyeva, Svetlana Salii, Andrej Sobolev, Mikhail Medvedev, Anton Vasyunin

AI总结 利用JWST高分辨率光谱数据,首次以~100 AU分辨率绘制了猎户座A中六个Class 0原恒星周围关键冰物种的像素级吸收图,揭示了冰丰度和分布的显著变化,并表明冰主要形成于前恒星阶段。

Comments 37 pages with 25 figures, accepted for publication in ApJ

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AI中文摘要

我们详细研究了猎户座A分子云中六个Class 0原恒星(HOPS-56、HOPS-60、HOPS-73、HOPS-91、HOPS-96和HOPS-108)周围星际冰的空间分布和化学成分。利用JWST NIRspec和MIRI MRS仪器的高分辨率光谱数据(4.3 - 8.1 μm),我们首次以~100 AU的分辨率构建了关键冰物种(包括$^{13}$CO$_2$、OCN$^-$、CO、H$_2$O、NH$_4^+$和H$_2$CO)的逐像素吸收图。CH$_4$和OCS在连续谱峰值处进行了分析。通过将观测光谱与实验室冰模拟拟合,推导出柱密度。我们采用辐射传输模型,证实了原恒星包层内柱密度估计的可靠性。我们的分析揭示了冰丰度和分布的显著变化,反映了包层内的物理结构和能量过程。具体而言,我们观察到原恒星加热和外流对冰幔的影响,在HOPS-60中尤为明显。总冰组成与天体化学模型一致,覆盖了约90%的观测冰库存,表明冰主要在前恒星阶段形成,随后被原恒星包层继承。根据相对于水的丰度,这些源可分为两个不同的组,可能指示了演化差异或包层密度和温度分布的变化。

英文摘要

We present a detailed study of the spatial distribution and chemical composition of interstellar ices toward six Class 0 protostars (HOPS-56, HOPS-60, HOPS-73, HOPS-91, HOPS-96, and HOPS-108) in the Orion A molecular cloud. Using high-resolution spectroscopic data from the JWST NIRspec and MIRI MRS instruments (4.3 - 8.1 $μ$m), we have constructed the first pixel by pixel absorption maps with a resolution of $\sim$100~AU for key ice species, including $^{13}$CO$_2$, OCN$^-$, CO, H$_2$O, NH$_4^+$, and H$_2$CO. CH$_4$ and OCS were analyzed toward the continuum peaks. The column densities were derived by fitting the observed spectra with laboratory ice analogs. We employed radiative transfer modeling, which confirmed the reliability of our column density estimates within the protostellar envelopes. Our analysis reveals significant variations in ice abundances and distributions, reflecting the physical structure and energetic processes within the envelopes. Specifically, we observe the influence of protostellar heating and outflows on the ice mantles, most notably in HOPS-60. The total ice composition is consistent with astrochemical models and covers $\sim$90% of observed ice inventory suggesting that ice is primarily formed during the prestellar stage and subsequently inherited by the protostellar envelope. Based on the abundance relative to water, the sources can be categorized into two distinct groups, possibly indicating evolutionary differences or variations in envelope density and temperature profiles.

2606.09775 2026-06-09 math.AP math.SP 新提交

Linear Stability of the Lamb-Chaplygin Dipole

Lamb-Chaplygin偶极子的线性稳定性

Francesco Pio Numero, Paolo Ventura

AI总结 通过哈密顿结构及对称性,识别了二维欧拉方程中Lamb-Chaplygin偶极子线性不稳定性的两种机制,并完全分类了线性化算子的谱和若尔当链。

Comments 16 pages, 1 figure

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AI中文摘要

我们描述了Lamb-Chaplygin偶极子(二维欧拉方程的一个经典行波解)附近的线性化动力学。利用系统的哈密顿结构及其对称性,我们识别了所有可能的线性不稳定性来源。对于$L^1\cap L^p$($p>2$)中的一般扰动,增长只能通过两种显式机制发生:(i)偶极子核心上的非零环量,以及(ii)沿与特征值$0$相关的广义特征向量的非平凡分量。特别地,我们完全分类了与线性动力学相关的算子的谱和若尔当链。这两种机制暗示了非线性动力学可能沿着对称性生成的行波偶极子族漂移,而不会远离该族。

英文摘要

We describe the linearized dynamics near the Lamb-Chaplygin dipole, a classical traveling solution of the two-dimensional Euler equations. Exploiting the Hamiltonian structure of the system together with its symmetries, we identify all possible sources of linear instability. For general perturbations in $L^1\cap L^p$, $p>2$, growth can occur only through two explicit mechanisms triggered by: {\rm (i)} a nonzero circulation on the core of the dipole, and {\rm (ii)} a nontrivial component along the generalized eigenvectors associated with the eigenvalue $0$. In particular, we completely classify the spectrum and the Jordan chains of the operator associated with the linear dynamics. Both mechanisms hint for a nonlinear dynamics that may drift along the symmetry-generated family of traveling dipoles without moving away from it.

2606.09773 2026-06-09 quant-ph 新提交

From Pauli Strings to Quantum Dynamics: A Unified Characterization

从泡利弦到量子动力学:统一刻画

Roberto Gargiulo, Paul Herringer, Robert Zeier

AI总结 通过泡利弦的辛性质,建立泡利李代数与克利福德子群之间的深层联系,提出基于不变量的方法高效识别李代数与轨道,并证明转导生成的克利福德子群为相应泡利李群提供3-设计。

Comments Comments are welcome

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AI中文摘要

理解量子系统的动力学性质是量子计算、量子控制和多体物理中的基本任务。表示论和李代数等工具提供了关于可达性和计算能力的关键信息。然而,对于任意生成集,这些信息可能难以精确获取或高效计算。这里我们聚焦于泡利弦的设置,它满足许多简化问题的特殊性质。我们发现泡利李代数与由转导生成的克利福德群的某些子群之间存在深层联系,这通过泡利弦的辛性质实现。这使得我们能够以泡利轨道、对称性和不变子空间的语言,给出这些对象及其可达性的基于不变量的视角。基于不变量的方法提供了识别李代数和轨道的高效算法,以及分析结构化泡利生成集的简单框架。我们还以初等方式证明,由转导生成的克利福德子群为相应的泡利李群提供3-设计。我们通过来自变分量子算法、受限量子计算、多体系统和随机电路的结构化示例来说明该框架。

英文摘要

Understanding the dynamical properties of quantum systems is an essential task in quantum computing, quantum control, and many-body physics. Tools such as representation theory and Lie theory provide crucial information on reachability and computational power. However, this information can be difficult to access exactly or compute efficiently for arbitrary generating sets. Here we focus on the setting of Pauli strings, which satisfy numerous exceptional properties that simplify the problem. We find deep connections between Pauli Lie algebras and certain subgroups of the Clifford group generated by transvections, through the symplectic properties of the Pauli strings. This allows us to give an invariant-based perspective on these objects and their reachability, in the language of Pauli orbits, symmetries, and invariant subspaces. The invariant-based approach provides efficient algorithms for identifying Lie algebras and orbits, as well as a simple framework for analyzing structured Pauli generating sets. We also show in an elementary way that Clifford subgroups generated by transvections provide 3-designs for the corresponding Pauli Lie groups. We illustrate the framework through structured examples from variational quantum algorithms, restricted quantum computation, many-body systems, and random circuits.

2606.09771 2026-06-09 physics.plasm-ph physics.app-ph physics.comp-ph 新提交

Fully-implicit Particle-in-Cell model of a Magnetic Nozzle with electromagnetic power deposition

电磁功率沉积的磁喷嘴全隐式粒子网格模型

Mario Merino, Juan Martín-Hernández, Pedro Jiménez-Jiménez, Luis Chacón

AI总结 采用1D3V全隐式Vlasov-Darwin粒子网格模型,研究右旋极化波在收敛-发散磁喷嘴中的传播,分析波加热对等离子体电势降和离子加速的影响。

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AI中文摘要

用于在螺旋波源和无电极等离子体推进器中产生和加热等离子体的电磁功率的一部分可能泄漏到外部膨胀区域,与磁喷嘴中的等离子体相互作用,影响装置性能。本文分析了当不同振幅的右旋极化波传播到收敛-发散磁喷嘴中等离子体的特性。通过一个1D3V全隐式、Vlasov-Darwin粒子网格模型,对磁管中的无碰撞离子和电子等离子体进行模拟。该代码精确地局部守恒电荷和全局守恒能量。它采用非均匀网格和增强的子步进程序来处理粒子轨迹。通过注入和下游边界条件上的线性闭环控制器,满足膨胀无电流的要求。波加热增加了电子垂直温度,尤其是在电子回旋共振表面附近,该表面始终存在于螺旋波装置的磁喷嘴内部。与无波情况相比,被激发的电子变得各向异性,并驱动更显著的电势降和更高的离子加速,但以消耗波功率为代价。计算的离子和电子分布矩揭示了动量方程和能量方程中电子热项、静电项和离子惯性项的主导平衡。波加热有助于填充原本不可及的电子相空间区域,并改变了纯静电情况下发现的双重俘获电子群体。

英文摘要

A fraction of the electromagnetic power used to generate and heat the plasma in helicon sources and electrodeless plasma thrusters can leak into the outer expansion region, interacting with the plasma in the magnetic nozzle and affecting the performance of the device. This work analyzes the properties of the plasma in a convergent-divergent magnetic nozzle when right-hand polarized waves of varying amplitude propagate into it. This is accomplished with a 1D3V fully-implicit, Vlasov-Darwin particle-in-cell model of the collisionless ion and electron plasma in a magnetic tube. The code exactly conserves charge locally and energy globally. It features a nonuniform grid and an enhanced substepping routine for the particle trajectories. The requirement that the expansion be current-free is satisfied thanks to linear closed-loop controllers on the injection and downstream boundary conditions. Wave heating increases the electron perpendicular temperature, especially in the vicinity of an electron cyclotron resonance surface, always present inside the magnetic nozzle of a helicon device. The energized electrons become anisotropic, and drive a more pronounced potential drop and a higher ion acceleration than in the absence of waves, at the expense of the wave power. The computed moments of the ion and electron distributions reveal the dominant balance of the electron thermal terms, electrostatic terms, and ion inertial terms in the momentum and energy equations. Wave heating helps populate otherwise-inaccessible regions of the electrons phase space and modifies the doubly-trapped electron population found in the purely electrostatic case...

2606.09769 2026-06-09 hep-th math-ph math.MP 新提交

All-multiplicity monodromy and KLT relations for AdS string integrals

全多重单值性与AdS弦积分KLT关系

Maria Nocchi, Rodrigo Schmidt Pitombo, Aurélie Strömholm Sangaré, Yi-Xiao Tao

AI总结 提出全多重AdS树级弦振幅构建块,通过多变量多重多对数及其单值类比修饰平面积分,推导开弦单值性关系与闭弦KLT分解,将低点平面对偶非对易AdS提升推广至一般n点运动学。

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AI中文摘要

我们提出并研究了AdS中树级弦振幅的全多重构建块。这些是世界sheet积分,通过分别用多变量多重多对数及其单值类比修饰相应的平面积分(圆盘和球面)得到。我们推导了开弦构建块的单值性关系以及闭弦构建块的KLT分解。这将低点平面对偶结构的非对易AdS提升推广到一般的$n$点运动学。

英文摘要

We propose and study all-multiplicity building blocks for tree-level string amplitudes in AdS. These are worldsheet integrals obtained by dressing the corresponding flat-space disc and sphere integrals with multivariable multiple polylogarithms and their single-valued analogues, respectively. We derive monodromy relations for the open-string building blocks and a KLT factorisation for their closed-string counterparts. This extends the non-commutative AdS uplift of lower-point flat-space structures to general $n$-point kinematics.

2606.09768 2026-06-09 hep-ph hep-ex hep-lat nucl-th 新提交

Dispersive analysis of the $\boldsymbol{J/ψ\to γπ^0 π^0}$ process

$\oldsymbol{J/ψ\ o γπ^0 π^0}$ 过程的色散分析

Bai-Long Hoid, Igor Danilkin, Anna Testa, Marc Vanderhaeghen

AI总结 利用色散振幅分析,结合BESIII数据,通过耦合道Muskhelishvili-Omnès表示描述$π^0π^0$系统的$S$波和$D$波,解决了$0^{++}-2^{++}$相位歧义,为引力形状因子中的双π贡献提供了输入。

Comments 28 pages, 6 figures

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AI中文摘要

我们提出了对辐射衰变$J/ψ\ oγπ^0π^0$中低能$π^0π^0$系统的色散振幅分析,使用了与质量无关的BESIII $0^{++}$和$2^{++}$强度、总谱以及测量的$0^{++}-2^{++}$ $E1$相位差。同位旋标量$S$波由耦合道$ππ/K\ar K$ Muskhelishvili-Omnès表示描述,该表示实现了与$f_0(500)$和$f_0(980)$相关的强末态相互作用。$D$波用单道$ππ$ Muskhelishvili-Omnès表示处理,在将其转换为实验$E1$、$M2$和$E3$多极子之前,我们识别了螺旋度振幅的所有运动学约束。赝标量介子对的平滑短距离产生通过减法多项式编码,而左-hand-cut效应被估计并发现数值上可忽略。我们识别出BESIII $0^{++}-2^{++}$ $E1$相位歧义的负解(在使用产生振幅的模$π$自由度后)作为与幺正性约束兼容的相位解,表明测量的相位信息可以通过Omnès相位运动容纳,而不需要大的额外相位。通过用提取的分支比归一化BESIII强度,我们固定了拟合振幅的绝对标度,使其适合作为未来双π贡献对引力形状因子的色散研究的输入。

英文摘要

We present a dispersive amplitude analysis of the low-energy $π^0π^0$ system in the radiative decay $J/ψ\toγπ^0π^0$, using the mass-independent BESIII $0^{++}$ and $2^{++}$ intensities, the total spectrum, and the measured $0^{++}-2^{++}$ $E1$ phase difference. The isoscalar $S$-wave is described by a coupled-channel $ππ/K\bar K$ Muskhelishvili-Omnès representation, which implements the strong final-state interactions associated with the $f_0(500)$ and $f_0(980)$. The $D$-wave is treated with a single-channel $ππ$ Muskhelishvili-Omnès representation, where we identify all kinematic constraints of helicity amplitudes before transforming them to the experimental $E1$, $M2$, and $E3$ multipoles. Smooth short-distance production of a pseudoscalar-meson pair is encoded in subtraction polynomials, while left-hand-cut effects are estimated and found to be numerically subleading. We identify the negative solution of the BESIII $0^{++}-2^{++}$ $E1$ phase ambiguity, after using the modulo-$π$ freedom of production amplitudes, as the phase solution compatible with unitarity constraints, showing that the measured phase information can be accommodated with the Omnès phase motion without requiring large additional phases. By normalizing the BESIII intensities with the extracted branching fraction, we fix the absolute scale of the fitted amplitudes, making them suitable as input for future dispersive studies of two-pion contributions to gravitational form factors.

2606.09766 2026-06-09 gr-qc 新提交

Modified Teukolsky Formalism for Extreme Mass-Ratio Inspirals in Higher-Derivative Gravity

修正的Teukolsky形式用于高阶导数引力中的极端质量比旋近

Chaoyi Yang, Neev Khera, Dongjun Li, Huan Yang

AI总结 针对高阶导数引力理论中质点旋入非旋转黑洞的问题,发展了修正的Teukolsky形式,计算了立方引力理论中黑洞视界和无穷远处的通量,为构建极端质量比旋近波形奠定基础。

Comments 25 pages, 5 figures

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AI中文摘要

在这项工作中,我们研究了一个模型问题,涉及在高阶导数引力理论中一个点粒子旋入非旋转黑洞。在这种理论中,背景时空以及引力波的产生和传播都与广义相对论不同。我们发展了一个修正的Teukolsky形式来描述由点粒子激发的引力波,并作为一个说明性示例,计算了立方引力理论中到黑洞视界和零无穷远的通量。该形式的构建方式可以自然地扩展到旋转黑洞。这些结果代表了在修正引力理论中构建极端质量比旋近波形的关键步骤,也可以缩放以近似等质量双黑洞系统的波形,类似于广义相对论中的现有方法。

英文摘要

In this work, we study a model problem involving a point particle inspiraling into a non-rotating black hole in higher-derivative theories of gravity. In such theories, both the background spacetime and the generation and propagation of gravitational waves differ from those in General Relativity. We develop a modified Teukolsky formalism to describe gravitational waves sourced by the point particle and, as an illustrative example, compute the resulting fluxes to the black hole horizon and null infinity for a cubic gravity theory. The formalism is constructed in a way that can be naturally extended to rotating black holes. These results represent essential steps to build extreme mass-ratio-inspiral waveforms in modified gravity theories, which may also be rescaled to approximate waveforms from comparable-mass binary black hole systems, analogous to existing approaches in General Relativity.

2606.09765 2026-06-09 quant-ph 新提交

Complexity-driven transitions in quantum observation

量子观测中的复杂性驱动转变

Zhenyu Du, Siyuan Cheng, Han Ye, Junjie Chen, Xiao Yuan, Xiongfeng Ma

AI总结 研究量子测量中信息损失与测量复杂度的关系,发现临界深度阈值下可观测性突然涌现,并证明随机测量可恢复恒定比例量子Fisher信息。

Comments 39 pages, 3 figures, comments are welcome!

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AI中文摘要

观察物理世界是科学的基础追求。然而,在量子领域,观察需要基本的量子到经典转换:破坏性测量将量子态不可逆地投影到经典数据,不可避免地导致信息损失。什么物理原理支配这种信息损失,我们如何构建最优测量以最大化读出?在这里,我们通过建立读出能力(由可访问的经典Fisher信息与总量子Fisher信息(QFI)之比量化)与测量复杂度(定义为投影前所需的量子电路深度)之间的内在关系来解决这些问题。值得注意的是,我们揭示了可观测性的突然涌现:一种完全由测量复杂度驱动的尖锐的隐藏到可见的转变。我们严格证明,在临界深度阈值以下——对于$δ$维架构为$Θ((\log n)^{1/δ})$,对于全连接为$Θ(\log\log n)$——读出能力随系统大小$n$指数衰减,使得量子信息根本不可访问。令人惊讶的是,刚好超过此阈值,系统进入可见区域:我们证明,使用近似酉3-设计,随机测量普遍恢复恒定比例的QFI,为此我们明确开发了针对有限维架构的最优深度电路构造。通过揭示支配量子观测的基本标度律和转变,我们的结果为量子学习、状态认证和量子计量学划定了明确的资源边界。

英文摘要

Observing the physical world is a foundational pursuit in science. In the quantum realm, however, observation necessitates a fundamental quantum-to-classical conversion: destructive measurements irreversibly project quantum states into classical data, inevitably incurring a loss of information. What physical principles govern this information loss, and how can we construct optimal measurements to maximize the readout? Here, we address these questions by establishing an intrinsic relationship between readout capability--quantified by the ratio of accessible classical Fisher information to the total quantum Fisher information (QFI), and measurement complexity--defined as the quantum circuit depth required prior to projection. Remarkably, we uncover a sudden emergence of observability: a sharp hidden-to-visible transition driven entirely by measurement complexity. We rigorously prove that below critical depth thresholds--$Θ((\log n)^{1/δ})$ for $δ$-dimensional architectures and $Θ(\log\log n)$ for all-to-all connectivity--readout capability decays exponentially with system size $n$, rendering the quantum information fundamentally inaccessible. Surprisingly, immediately above this threshold, the system enters a visible regime: we demonstrate that randomized measurements universally recover a constant fraction of the QFI using approximate unitary 3-designs, for which we explicitly develop optimal-depth circuit constructions tailored to finite-dimensional architectures. By unveiling the fundamental scaling laws and transitions that govern quantum observation, our results delineate definitive resource boundaries for quantum learning, state certification, and quantum metrology.

2606.09761 2026-06-09 math.LO math.CO 新提交

$\mathbb Z$-Ramsey ultrafilters

$\mathbb Z$-Ramsey 超滤子

José Antonio Corona-García, David José Fernández-Bretón, Ulises Ariet Ramos-García

AI总结 研究Z-Ramsey超滤子,证明其不存在的一致性,并揭示其选择性性质,同时构造反例解决Petrenko和Protasov的开放问题。

Comments 15 pages

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AI中文摘要

我们研究 $\mathbb{Z}$-Ramsey 超滤子,即包含 Ramsey 定理每个平移不变实例的见证者的超滤子。我们证明不存在 $\mathbb Z$-Ramsey 超滤子是一致的。我们还证明每个 $(\mathbb{Z},3)$-Ramsey 超滤子以及每个 $\mathbb{Z}$-Ramsey P-点都是选择性的。此外,我们展示了一个泛型扩张——使用形如 \\(\mathcal{P}(\mathbb{Z})/\mathcal{I}\\) 的商代数,其中 \\(\mathcal{I}\\) 是某些 \\(F_{\sigma}\\)-理想——该扩张包含不是 \\(\mathbb{Z}\\)-Ramsey 超滤子的 P-点,从而解决了 Petrenko 和 Protasov 提出的开放问题。

英文摘要

We study $\mathbb{Z}$-Ramsey ultrafilters, ultrafilters containing witnesses to every shift-invariant instance of Ramsey's theorem. We prove that it is consistent that there are no $\mathbb Z$-Ramsey ultrafilters. We also prove that every $(\mathbb{Z},3)$-Ramsey ultrafilter, as well as every $\mathbb{Z}$-Ramsey P-point, is selective. Further, we exhibit a generic extension -- using quotient algebras of the form \(\mathcal{P}(\mathbb{Z})/\mathcal{I}\) for certain \(F_{σ}\)-ideals -- that contains P-points that are not \(\mathbb{Z}\)-Ramsey ultrafilters, thereby addressing open questions raised by Petrenko and Protasov.

2606.09760 2026-06-09 hep-ph hep-th nucl-th 新提交

Einstein-de Haas effect and induced rotation in an evolving magnetized QCD matter

爱因斯坦-德哈斯效应与演化中的磁化QCD物质中的诱导旋转

Dushmanta Sahu, Captain R. Singh

AI总结 研究在动态膨胀的夸克-胶子等离子体中,利用准粒子模型计算爱因斯坦-德哈斯效应诱导的角速度,发现其随固有时增长并在高温下被抑制,揭示了自旋主导与惯性主导的磁场诱导旋转区域之间的交叉。

Comments 10 pages and 5 captioned figures

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AI中文摘要

爱因斯坦-德哈斯(EdH)效应描述了在外磁场下由自旋排列驱动的集体旋转的出现。我们使用准粒子模型(QPM)在动态膨胀的夸克-胶子等离子体(QGP)中研究这一效应。我们计算了EdH诱导的角速度$ω_{\mathrm{EdH}}$作为温度、固有时和火球半径的函数。我们的结果表明,$ω_{\mathrm{EdH}}$随固有时增长,因此在较高温度下被抑制。在QGP交叉温度附近,$ω_{\mathrm{EdH}}$达到一个显著且不可忽略的量级。我们识别出强磁场和弱磁场区域之间的一个非平凡交叉,反映了自旋排列与维持轨道运动所需能量之间的竞争。这个非平凡交叉温度将磁场诱导旋转的自旋主导区域与惯性主导区域分开。这些发现确立了EdH效应作为磁化QCD物质中角动量守恒的一种表现。

英文摘要

The Einstein-de Haas (EdH) effect describes the emergence of collective rotation driven by spin alignment under an external magnetic field. We investigate this effect in a dynamically expanding quark-gluon plasma (QGP) using a quasiparticle model (QPM). We compute the EdH-induced angular velocity $ω_{\mathrm{EdH}}$ as a function of temperature, proper time, and fireball radius. Our results show that $ω_{\mathrm{EdH}}$ grows with proper time and is consequently suppressed at higher temperatures. Near the QGP crossover temperature, $ω_{\mathrm{EdH}}$ attains a substantial, non-negligible magnitude. We identify a nontrivial crossing between the strong and weak magnetic field regimes that reflects the competition between spin alignment and the energy required to sustain orbital motion. This nontrivial crossing temperature separates a spin-dominated regime from an inertia-dominated regime of magnetic field-induced rotation. These findings establish the EdH effect as a manifestation of angular momentum conservation in magnetized QCD matter.

2606.09759 2026-06-09 physics.atom-ph quant-ph 新提交

Suppressing the Motion of Rydberg Atoms in Inhomogeneous Electric Fields via Stark Echo

通过斯塔克回波抑制非均匀电场中里德伯原子的运动

Dominik Jakab, Manuel Kaiser, Conny Glaser, David Petrosyan, József Fortágh, Andreas Günther

AI总结 针对表面非均匀电场导致里德伯原子运动及能级偏移的问题,提出斯塔克回波序列动态反转力,抑制原子运动并保持共振,适用于芯片耦合架构。

Comments 9 pages, 7 figures

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AI中文摘要

里德伯原子具有强电偶极跃迁和可调能级,使其成为集成超导原子芯片上微波到光学转换的有前途的候选者。实现原子与片上谐振器微波场等的强耦合需要将原子放置在距芯片表面几十微米以内。然而,源自表面的非均匀杂散电场会产生位置依赖的斯塔克力,导致原子运动并引起里德伯能级的时间依赖偏移。我们使用飞行时间和光谱技术实验研究了这些效应,观察到归因于场致原子运动的显著能级偏移和信号损失。包含指数衰减表面场和叠加偏置的理论模型准确再现了观察到的动力学。为了减轻能级偏移,我们引入了一种斯塔克回波序列,动态反转力。该方法抑制了原子运动并维持了原子共振。该方法仅依赖于全局场控制,与原子-谐振器耦合架构兼容,为在表面附近的非均匀电场中保持里德伯原子的相干性提供了一种鲁棒策略。

英文摘要

Rydberg atoms possess strong electric dipole transitions and tunable energy levels, making them promising candidates for microwave to optical conversion on integrated superconducting atom chips. Achieving strong coupling of the atoms to e.g. the microwave field of an on-chip resonator requires placing the atoms within tens of micrometers from the chip surface. However, inhomogeneous stray electric fields originating from the surface can induce position-dependent Stark forces, resulting in atomic motion and leading to time-dependent shifts of the Rydberg energy levels. We experimentally investigate these effects using time-of-flight and spectroscopic techniques, observing substantial level shifts and signal loss attributable to field-induced atomic motion. A theoretical model incorporating an exponentially decaying surface field with a superimposed bias accurately reproduces the observed dynamics. To mitigate the level shift, we introduce a Stark echo sequence that dynamically reverses the force. This approach suppresses the atomic motion and maintains the atomic resonance. The method relies solely on global field control and is compatible with atom-resonator coupling architectures, providing a robust strategy for preserving coherence of Rydberg atoms in inhomogeneous electric fields near surfaces.

2606.09757 2026-06-09 hep-ph hep-lat nucl-th 新提交

Partial Pressure Contributions of Hadron Families to the QCD Equation of State

强子族对QCD状态方程的分压贡献

Jonathan Gonzales, Alejandro Florez, Johannes Jahan, Angel R. Nava Acuna, Naman Mehndiratta, Claudia Ratti

AI总结 通过重子数、电荷和奇异数的线性组合从晶格QCD中提取不同强子族对压强的贡献,并在HRG模型中验证其有效性。

Comments 9 pages, 14 figures

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AI中文摘要

晶格模拟提供了量子色动力学(QCD)的热力学性质,作为温度的函数,在重子化学势为零到中等值的情况下。然而,单个强子种类的贡献无法直接从晶格计算中分离出来。在这项工作中,我们找到了高达四阶磁化率的线性组合,这些组合根据强子的重子数$B$、电荷$Q$和奇异数$S$含量将强子对QCD压强的贡献分离出来。这些组合是有效的,前提是低温区域强相互作用气体的热力学可以建模为非相互作用强子及其共振的气体。最后,我们在强子共振气体(HRG)模型中测试了这些线性组合的有效性,并使用连续极限估计的磁化率将其与现有的晶格QCD结果进行比较。

英文摘要

Lattice simulations provide the thermodynamics of quantum chromodynamics (QCD) as a function of the temperature, at zero-to-moderate values of the baryonic chemical potential. However, the contribution of single hadronic species cannot be directly isolated from lattice calculations. In this work, we find linear combinations of up to fourth order susceptibilities which isolate the contribution of hadrons to the QCD pressure according to their baryon number $B$, electric charge $Q$ and strangeness $S$ content. These combinations are valid, provided that the thermodynamics of a strongly-interacting gas in the low-temperature regime can be modeled as a gas of non-interacting hadrons and their resonances. Finally, we test the validity of these linear combinations in the Hadron Resonance Gas (HRG) model and compare them to available lattice QCD results, using continuum-estimated susceptibilities.

2606.09755 2026-06-09 cond-mat.mes-hall 新提交

Radiowave-induced Resistance Oscillations

无线电波诱导的电阻振荡

E. Bell, C. Hnatovsky, K. W. Baldwin, L. N. Pfeiffer, K. W. West, S. Studenikin, M. A. Zudov

AI总结 实验发现一种新型辐射诱导磁电阻振荡,发生在回旋频率远大于辐射频率时,振幅与辐射功率无关,周期由辐射电场控制,可呈现1/B或1/B²周期性,并用短程无序位移模型解释。

Comments 5 pages, 5 figures

详情
AI中文摘要

微波诱导电阻振荡(MIROs)\cite{zudov:2001a}发生在二维电子气受到频率$ω= 2πf$的辐射和变化的磁场$B$时。MIROs在$1/B$中呈周期性,周期由辐射频率$ω$决定,其振幅与辐射功率成比例。从朗道能级间的单光子跃迁出发,MIROs出现在回旋共振的低场侧,即$ω_c \lesssim ω$,其中$ω_c$是回旋频率。这里,我们报告了另一类磁电阻振荡的实验观测,它们也由辐射诱导,但处于射频(UHF波段)范围。这些振荡在以下方面与MIROs不同:(i)它们发生在$ω_c \gg ω$时,(ii)它们的振幅与辐射功率无关,(iii)它们的周期由辐射电场控制,而非$ω$,以及(iv)它们可以是$1/B$或$1/B^2$周期性的,取决于$B$。我们进一步表明,这些振荡可以用短程无序极限下的位移模型来解释。

英文摘要

Microwave-induced resistance oscillations (MIROs) \cite{zudov:2001a} occur when a 2D electron gas is subjected to radiation of frequency $ω= 2 πf$ and varying magnetic field $B$. MIROs are periodic in $1/B$, with the period determined by the radiation frequency $ω$, and their amplitude scales with the radiation power. Stepping from single-photon transitions between Landau levels, MIROs are found on the lower-field side of the cyclotron resonance, $ω_c \lesssim ω$, where $ω_c$ is the cyclotron frequency. Here, we report on experimental observation of another class of magneto resistance oscillations, which are also induced by radiation, but in the radio frequency (UHF band) range. These oscillations are distinct from MIROs in the following aspects: (i) they occur at $ω_c \gg ω$, (ii) their amplitude is independent of radiation power, (iii) their period is controlled by the radiation electric field, rather than by $ω$, and (iv) they can be either $1/B$ or $1/B^2$-periodic, depending on $B$. We further show that these oscillations can be explained by a displacement model in the limit of short-range disorder.

2606.09754 2026-06-09 cs.CY cs.CR cs.SI 新提交

Human-Centred Risk Mitigation for AI-Mediated Information Manipulation: A SOCMINT Framework Based on Information Manipulation Sets

以人为中心的AI中介信息操纵风险缓解:基于信息操纵集的SOCMINT框架

Antonio Scala

AI总结 提出基于信息操纵集(IMS)的SOCMINT框架,作为事件级分析与归因优先分析之间的中间操作单元,实现结构化推理与风险缓解。

Comments 15 pages; supplementary material available as ancillary file

详情
AI中文摘要

AI中介的信息操纵日益表现为针对信任、注意力、可信度、声誉和决策的社会网络攻击,而不仅仅是技术基础设施或孤立的虚假内容。现有的防御方法常常在事件级分析(将操纵碎片化为弱信号)和归因优先分析(可能延迟缓解直至责任确定)之间摇摆。本文提出一个基于信息操纵集(IMS)的SOCMINT框架,作为单个事件与战略归因之间的中间操作单元。基于VIGINUM/EEAS在反FIMI分析中使用IMS的经验,该框架将操纵视为一个连贯的过程,涉及叙事、账户、基础设施、时间模式、跨平台迁移、合成放大和认知目标。所提出的流程从信号检测和诊断分类,到IMS假设构建、置信度/严重性评估、缓解选择,再到迭代更新。一个紧凑的场景说明了基于IMS的分析如何捕捉内容级和归因优先方法遗漏的内容。本文还提出一个桌面评估协议,用于评估决策质量、置信度校准和缓解比例性。主要启示是,以人为中心的风险缓解不仅需要更好的检测,还需要在不确定性下进行结构化推理、可审计的决策制定,以及防止过度安全化合法异议的保障措施。

英文摘要

AI-mediated information manipulation increasingly takes the form of social cyber attacks that target trust, attention, credibility, reputation, and decision-making rather than only technical infrastructures or isolated false contents. Existing defensive approaches often oscillate between incident-level analysis, which fragments campaigns into weak signals, and attribution-first analysis, which may delay mitigation until responsibility is established. This paper proposes a SOCMINT framework based on Information Manipulation Sets (IMS) as an intermediate operational unit between individual incidents and strategic attribution. Building on the VIGINUM/EEAS use of IMS in counter-FIMI analysis, the framework treats manipulation as a coherent process involving narratives, accounts, infrastructures, temporal patterns, cross-platform migration, synthetic amplification, and cognitive targeting. The proposed pipeline moves from signal detection and diagnostic triage to IMS hypothesis construction, confidence/severity assessment, mitigation selection, and iterative update. A compact scenario illustrates how IMS-based analysis captures what content-level and attribution-first approaches miss. The paper also proposes a tabletop evaluation protocol to assess decision quality, confidence calibration, and mitigation proportionality. The main implication is that human-centred risk mitigation requires not only better detection, but also structured reasoning under uncertainty, auditable decision-making, and safeguards against over-securitising legitimate dissent.