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An Elliptic Solution of the Classical Yang–Baxter Equation Associated with the Queer Lie Superalgebra 与阙列超代数相关的经典杨-巴克斯特方程的椭圆解
IF 1.4 3区 物理与天体物理 Q2 PHYSICS, MATHEMATICAL Pub Date : 2024-05-22 DOI: 10.1007/s00023-024-01449-8
Maxim Nazarov

A solution of the classical Yang–Baxter equation associated with the queer Lie superalgebra is constructed in terms of Hermite theta functions.

用赫米特θ函数构建了与阙烈超代数相关的经典杨-巴克斯特方程的解。
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引用次数: 0
Dually Weighted Multi-matrix Models as a Path to Causal Gravity-Matter Systems 双加权多矩阵模型是通向因果引力物质系统的途径
IF 1.4 3区 物理与天体物理 Q2 PHYSICS, MATHEMATICAL Pub Date : 2024-05-07 DOI: 10.1007/s00023-024-01442-1
Juan L. A. Abranches, Antonio D. Pereira, Reiko Toriumi

We introduce a dually-weighted multi-matrix model that for a suitable choice of weights reproduce two-dimensional Causal Dynamical Triangulations (CDT) coupled to the Ising model. When Ising degrees of freedom are removed, this model corresponds to the CDT-matrix model introduced by Benedetti and Henson (Phys Lett B 678:222, 2009). We present exact as well as approximate results for the Gaussian averages of characters of a Hermitian matrix A and (A^2) for a given representation and establish the present limitations that prevent us to solve the model analytically. This sets the stage for the formulation of more sophisticated matter models coupled to two-dimensional CDT as dually weighted multi-matrix models providing a complementary view to the standard simplicial formulation of CDT-matter models.

我们介绍了一种双权重多矩阵模型,对于合适的权重选择,它可以重现与伊辛模型耦合的二维因果动态三角模型(CDT)。去掉伊辛自由度后,该模型与贝内代蒂和亨森(Phys Lett B 678:222, 2009)提出的 CDT 矩阵模型相对应。我们给出了给定表示法下赫米矩阵 A 和 (A^2)字符的高斯平均值的精确和近似结果,并确定了阻碍我们分析求解模型的现有限制。这为把与二维 CDT 耦合的更复杂的物质模型表述为双重加权多矩阵模型奠定了基础,为 CDT-物质模型的标准简单表述提供了补充视角。
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引用次数: 0
Energy in Fourth-Order Gravity 四阶引力中的能量
IF 1.4 3区 物理与天体物理 Q2 PHYSICS, MATHEMATICAL Pub Date : 2024-05-07 DOI: 10.1007/s00023-024-01440-3
R. Avalos, J. H. Lira, N. Marque

In this paper we make a detailed analysis of conservation principles in the context of a family of fourth-order gravitational theories generated via a quadratic Lagrangian. In particular, we focus on the associated notion of energy and start a program related to its study. We also exhibit examples of solutions which provide intuitions about this notion of energy which allows us to interpret it, and introduce several study cases where its analysis seems tractable. Finally, positive energy theorems are presented in restricted situations.

在本文中,我们详细分析了通过二次拉格朗日产生的四阶引力理论族的守恒原理。我们特别关注相关的能量概念,并启动了与之相关的研究计划。我们还展示了一些解例,这些解例为我们解释能量概念提供了直觉,并介绍了几种对其进行分析似乎比较容易的研究案例。最后,我们还介绍了受限情况下的正能量定理。
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引用次数: 0
Flux Quantization on Phase Space 相空间上的通量量化
IF 1.4 3区 物理与天体物理 Q2 PHYSICS, MATHEMATICAL Pub Date : 2024-05-05 DOI: 10.1007/s00023-024-01438-x
Hisham Sati, Urs Schreiber

While it has become widely appreciated that (higher) gauge theories need, besides their variational phase space data, to be equipped with “flux quantization laws” in generalized differential cohomology, there used to be no general prescription for how to define and construct the resulting flux-quantized phase space stacks. In this short note, we observe that all higher Maxwell-type equations have solution spaces given by flux densities on a Cauchy surface subject to a higher Gauß law and no further constraint: The metric duality-constraint is all absorbed into the evolution equation away from the Cauchy surface. Moreover, we observe that the higher Gauß law characterizes the Cauchy data as flat differential forms valued in a characteristic (L_infty )-algebra. Using the recent construction of the non-abelian Chern–Dold character map, this implies that compatible flux quantization laws on phase space have classifying spaces whose rational Whitehead (L_infty )-algebra is this characteristic one. The flux-quantized higher phase space stack of the theory is then simply the corresponding (generally non-abelian) differential cohomology moduli stack on the Cauchy surface. We show how this systematic prescription reproduces existing proposals for flux-quantized phase spaces of vacuum Maxwell theory and of the chiral boson and its higher siblings, but reveals that there are other choices of (non-abelian) flux quantization laws even in these basic cases, further discussed in a companion article (Sati and Schreiber in Quantum observables on quantized fluxes. arXiv:2312.13037). Moreover, for the case of NS/RR-fields in type II supergravity/string theory, the traditional “Hypothesis K” of flux quantization in topological K-theory is naturally implied, without the need, on phase space, of the notorious further duality constraint. Finally, as a genuinely non-abelian example we consider flux quantization of the C-field in 11d supergravity/M-theory given by unstable differential 4-Cohomotopy (“Hypothesis H”) and emphasize again that, implemented on Cauchy data, this qualifies as the full phase space without the need for a further duality constraint.

虽然人们已经普遍认识到,(高等)规规理论除了其变分相空间数据之外,还需要广义微分同调中的 "通量量化定律",但对于如何定义和构造由此产生的通量量化相空间堆栈,过去却没有通用的规定。在这篇短文中,我们观察到所有高阶麦克斯韦方程的解空间都是由考希曲面上的通量密度给出的,受高阶高斯定律的约束,没有进一步的约束:度量对偶约束全部被吸收到远离考希曲面的演化方程中。此外,我们观察到高Gauß定律将Cauchy数据表征为在特(L_infty )代数中估值的平微分形式。利用最近构建的非阿贝尔切恩-道尔德特征映射,这意味着相空间上兼容的通量量化定律有其有理怀特海(Whitehead)(L_infty)-代数就是这个特征的分类空间。理论的通量量化高阶相空间堆栈就是考奇面上相应的(一般是非阿贝尔的)微分同调模数堆栈。我们展示了这一系统处方如何再现了真空麦克斯韦理论和手性玻色子及其高阶同胞的通量量化相空间的现有建议,但同时也揭示了即使在这些基本情况下也存在其他(非阿贝尔)通量量化定律的选择,这将在另一篇文章中进一步讨论(萨提和施雷伯在《量子化通量上的量子可观测性》中,arXiv:2312.13037)。此外,对于 II 型超引力/弦理论中的 NS/RR 场,拓扑 K 理论中通量量子化的传统 "假说 K "是自然隐含的,而不需要相空间上臭名昭著的进一步对偶约束。最后,作为一个真正非阿贝尔的例子,我们考虑了不稳定微分 4-同调("假设 H")给出的 11d 超引力/弦理论中 C 场的通量量子化,并再次强调,在考奇数据上实现的这一假设是完整的相空间,无需进一步的对偶约束。
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引用次数: 0
Lightcone Modular Bootstrap and Tauberian Theory: A Cardy-Like Formula for Near-Extremal Black Holes 光锥模块化引导和陶伯理论:近极端黑洞的卡迪式公式
IF 1.4 3区 物理与天体物理 Q2 PHYSICS, MATHEMATICAL Pub Date : 2024-05-03 DOI: 10.1007/s00023-024-01441-2
Sridip Pal, Jiaxin Qiao

We show that for a unitary modular invariant 2D CFT with central charge (c>1) and having a nonzero twist gap in the spectrum of Virasoro primaries, for sufficiently large spin J, there always exist spin-J operators with twist falling in the interval ((frac{c-1}{12}-varepsilon ,frac{c-1}{12}+varepsilon )) with (varepsilon =O(J^{-1/2}log J)). We establish that the number of Virasoro primary operators in such a window has a Cardy-like, i.e., (exp left( 2pi sqrt{frac{(c-1)J}{6}}right) ) growth. A similar result is proven for a family of holographic CFTs with the twist gap growing linearly in c and a uniform boundedness condition, in the regime (Jgg c^3gg 1). From the perspective of near-extremal rotating BTZ black holes (without electric charge), our result is valid when the Hawking temperature is much lower than the “gap temperature.”

我们证明,对于中心电荷为 (c>;1)并且在Virasoro原初谱中具有非零扭转间隙的情况下,对于足够大的自旋J,总是存在扭转落在区间((frac{c-1}{12}-varepsilon ,frac{c-1}{12}+varepsilon ))内的自旋-J算子,并且(varepsilon =O(J^{-1/2}log J))。我们证明,在这样一个窗口中,维拉索罗主算子的数目具有类似于卡迪的增长,即(exp left( 2pi sqrtfrac{(c-1)J}{6}right) )增长。类似的结果也被证明适用于全息CFT家族,其扭转间隙在c中线性增长,并且在(Jgg c^3gg 1) 机制下具有均匀约束条件。从近极旋转BTZ黑洞(不带电荷)的角度来看,当霍金温度远低于 "间隙温度 "时,我们的结果是有效的。
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引用次数: 0
The Small-N Series in the Zero-Dimensional O(N) Model: Constructive Expansions and Transseries 零维 O(N) 模型中的小 N 序列:构造展开与跨序列
IF 1.4 3区 物理与天体物理 Q2 PHYSICS, MATHEMATICAL Pub Date : 2024-04-30 DOI: 10.1007/s00023-024-01437-y
Dario Benedetti, Razvan Gurau, Hannes Keppler, Davide Lettera

We consider the zero-dimensional quartic O(N) vector model and present a complete study of the partition function Z(gN) and its logarithm, the free energy W(gN), seen as functions of the coupling g on a Riemann surface. We are, in particular, interested in the study of the transseries expansions of these quantities. The point of this paper is to recover such results using constructive field theory techniques with the aim to use them in the future for a rigorous analysis of resurgence in genuine quantum field theoretical models in higher dimensions. Using constructive field theory techniques, we prove that both Z(gN) and W(gN) are Borel summable functions along all the rays in the cut complex plane (mathbb {C}_{pi } =mathbb {C}{setminus } mathbb {R}_-). We recover the transseries expansion of Z(gN) using the intermediate field representation. We furthermore study the small-N expansions of Z(gN) and W(gN). For any (g=|g| e^{imath varphi }) on the sector of the Riemann surface with (|varphi |<3pi /2), the small-N expansion of Z(gN) has infinite radius of convergence in N, while the expansion of W(gN) has a finite radius of convergence in N for g in a subdomain of the same sector. The Taylor coefficients of these expansions, (Z_n(g)) and (W_n(g)), exhibit analytic properties similar to Z(gN) and W(gN) and have transseries expansions. The transseries expansion of (Z_n(g)) is readily accessible: much like Z(gN), for any n, (Z_n(g)) has a zero- and a one-instanton contribution. The transseries of (W_n(g)) is obtained using Möbius inversion, and summing these transseries yields the transseries expansion of W(gN). The transseries of (W_n(g)) and W(gN) are markedly different: while W(gN) displays contributions from arbitrarily many multi-instantons, (W_n(g)) exhibits contributions of only up to n-instanton sectors.

我们考虑了零维四元 O(N) 矢量模型,并对作为黎曼曲面上耦合 g 的函数的分割函数 Z(g, N) 及其对数自由能 W(g, N) 进行了完整的研究。我们尤其有兴趣研究这些量的跨序列展开。本文的重点是利用构造场论技术恢复这些结果,目的是将来用它们来严格分析真正的量子场论模型在更高维度上的恢复。利用构造场论技术,我们证明了Z(g, N)和W(g, N)都是沿着切复数平面上所有射线的伯累尔可求和函数(mathbb {C}_{pi } =mathbb {C}{setminus } mathbb {R}_-)。我们利用中间场表示恢复了 Z(g, N) 的跨序列展开。我们还将进一步研究 Z(g, N) 和 W(g, N) 的小 N 展开。对于黎曼曲面扇形上任意具有 (g=|g| e^{imath varphi }) 的 (|varphi |<3pi /2),Z(g, N)的小-N展开在N内具有无限收敛半径,而对于同一扇形的子域中的g,W(g, N)的展开在N内具有有限收敛半径。这些展开的泰勒系数((Z_n(g))和(W_n(g)))表现出与 Z(g,N)和 W(g,N)类似的解析性质,并且具有跨序列展开。(Z_n(g)) 的跨序列展开很容易获得:与 Z(g,N)很相似,对于任意 n,(Z_n(g)) 有一个零和一个单斯坦顿贡献。使用莫比乌斯反演可以得到 (W_n(g)) 的跨序列,将这些跨序列相加就得到了 W(g, N) 的跨序列展开。W(g,N)和W(g,N)的跨序列有明显的不同:W(g,N)显示了来自任意多个多量子的贡献,而(W_n(g))只显示了多达n个量子扇区的贡献。
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引用次数: 0
CLT for (beta )-Ensembles at High Temperature and for Integrable Systems: A Transfer Operator Approach 用于高温下 $$beta $$ 组合和可积分系统的 CLT:转移算子方法
IF 1.4 3区 物理与天体物理 Q2 PHYSICS, MATHEMATICAL Pub Date : 2024-04-26 DOI: 10.1007/s00023-024-01435-0
G. Mazzuca, R. Memin

In this paper, we prove a polynomial central limit theorem for several integrable models and for the (beta )-ensembles at high temperature with polynomial potential. Furthermore, we connect the mean values, the variances and the correlations of the moments of the Lax matrices of these integrable systems with the ones of the (beta )-ensembles. Moreover, we show that the local functions’ space-correlations decay exponentially fast for the considered integrable systems. For these models, we also established a Berry–Esseen-type bound.

在本文中,我们证明了几种可积分模型的多项式中心极限定理,以及高温下具有多项式势的(beta )-符号的多项式中心极限定理。此外,我们将这些可积分系统的 Lax 矩阵的均值、方差和相关性与 (β)-ensembles 矩阵的均值、方差和相关性联系起来。此外,我们还证明,对于所考虑的可积分系统,局部函数的空间相关性呈指数级快速衰减。对于这些模型,我们还建立了贝里-埃森型约束。
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引用次数: 0
Uniqueness of Maximal Spacetime Boundaries 最大时空边界的唯一性
IF 1.4 3区 物理与天体物理 Q2 PHYSICS, MATHEMATICAL Pub Date : 2024-04-26 DOI: 10.1007/s00023-024-01436-z
Melanie Graf, Marco van den Beld-Serrano

Given an extendible spacetime one may ask how much, if any, uniqueness can in general be expected of the extension. Locally, this question was considered and comprehensively answered in a recent paper of Sbierski [22], where he obtains local uniqueness results for anchored spacetime extensions of similar character to earlier work for conformal boundaries by Chruściel [2]. Globally, it is known that non-uniqueness can arise from timelike geodesics behaving pathologically in the sense that there exist points along two distinct timelike geodesics which become arbitrarily close to each other interspersed with points which do not approach each other. We show that this is in some sense the only obstruction to uniqueness of maximal future boundaries: Working with extensions that are manifolds with boundary we prove that, under suitable assumptions on the regularity of the considered extensions and excluding the existence of such “intertwined timelike geodesics”, extendible spacetimes admit a unique maximal future boundary extension. This is analogous to results of Chruściel for the conformal boundary.

给定一个可扩展的时空,我们可能会问,如果有唯一性的话,扩展的唯一性一般有多大。斯比尔斯基(Sbierski)最近发表的一篇论文[22]从局部考虑并全面回答了这个问题,他在论文中得到了锚定时空扩展的局部唯一性结果,其性质与克鲁希塞尔(Chruściel)[2]早先针对共形边界所做的工作相似。从全局来看,众所周知,非唯一性可能源于时间似大地线的病态行为,即沿着两条不同的时间似大地线存在着一些点,这些点任意地相互靠近,其中还夹杂着一些互不靠近的点。我们证明,这在某种意义上是最大未来边界唯一性的障碍:对于有边界的流形的扩展,我们证明,在对所考虑的扩展的规则性作适当假设并排除这种 "交织的时间似大地线 "的存在的情况下,可扩展的时空承认一个唯一的最大未来边界扩展。这与克鲁希塞尔(Chruściel)关于共形边界的结果类似。
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引用次数: 0
Good Inducing Schemes for Uniformly Hyperbolic Flows, and Applications to Exponential Decay of Correlations 均匀双曲流动的良好诱导方案及其在相关性指数衰减中的应用
IF 1.4 3区 物理与天体物理 Q2 PHYSICS, MATHEMATICAL Pub Date : 2024-04-25 DOI: 10.1007/s00023-024-01439-w
Ian Melbourne, Paulo Varandas

Given an Axiom A attractor for a (C^{1+alpha }) flow ((alpha >0)), we construct a countable Markov extension with exponential return times in such a way that the inducing set is a smoothly embedded unstable disk. This avoids technical issues concerning irregularity of boundaries of Markov partition elements and enables an elementary approach to certain questions involving exponential decay of correlations for SRB measures.

给定一个(C^{1+alpha } )流((alpha >0))的公理A吸引子,我们以诱导集是平滑嵌入的不稳定盘的方式构造一个具有指数返回时间的可数马尔可夫扩展。这避免了有关马尔可夫分区元素边界不规则性的技术问题,并使我们能够用一种基本方法来解决涉及 SRB 度量相关性指数衰减的某些问题。
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引用次数: 0
A Mathematical Framework for Quantum Hamiltonian Simulation and Duality 量子哈密顿模拟与对偶的数学框架
IF 1.4 3区 物理与天体物理 Q2 PHYSICS, MATHEMATICAL Pub Date : 2024-04-10 DOI: 10.1007/s00023-024-01432-3
Harriet Apel, Toby Cubitt

Analogue Hamiltonian simulation is a promising near-term application of quantum computing and has recently been put on a theoretical footing alongside experiencing wide-ranging experimental success. These ideas are closely related to the notion of duality in physics, whereby two superficially different theories are mathematically equivalent in some precise sense. However, existing characterisations of Hamiltonian simulations are not sufficiently general to extend to all dualities in physics. We give a generalised duality definition encompassing dualities transforming a strongly interacting system into a weak one and vice versa. We characterise the dual map on operators and states and prove equivalence ofduality formulated in terms of observables, partition functions and entropies. A building block is a strengthening of earlier results on entropy preserving maps—extensions of Wigner’s celebrated theorem- –to maps that are entropy preserving up to an additive constant. We show such maps decompose as a direct sum of unitary and antiunitary components conjugated by a further unitary, a result that may be of independent mathematical interest.

类比哈密顿模拟是量子计算的一个前景广阔的近期应用,最近在取得广泛实验成功的同时,也在理论上得到了证实。这些想法与物理学中的对偶性概念密切相关,即两个表面上不同的理论在某种精确意义上是数学等价的。然而,现有的汉密尔顿模拟特征描述还不够普遍,无法扩展到物理学中的所有对偶性。我们给出了一个广义的对偶性定义,其中包括将强相互作用系统转化为弱相互作用系统的对偶性,反之亦然。我们描述了关于算子和状态的对偶映射的特征,并证明了用观测值、分区函数和熵来表述的对偶的等价性。我们将早先关于熵守恒映射的结果--维格纳著名定理的扩展--强化为熵守恒映射,直至一个加常数。我们表明,这种映射分解为由另一个单元共轭的单元和反单元成分的直接和,这一结果可能具有独立的数学意义。
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引用次数: 0
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Annales Henri Poincaré
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