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Transforming Stäckel Hamiltonians of Benenti type to polynomial form 将Stäckel的Benenti型哈密顿变换为多项式形式
IF 1.5 4区 物理与天体物理 Q1 Mathematics Pub Date : 2021-01-02 DOI: 10.4310/atmp.2022.v26.n3.a5
Jean de Dieu Maniraguha, K. Marciniak, C'elestin Kurujyibwami
In this paper we discuss two canonical transformations that turn St"{a}ckel separable Hamiltonians of Benenti type into polynomial form: transformation to Vi`ete coordinates and transformation to Newton coordinates. Transformation to Newton coordinates has been applied to these systems only very recently and in this paper we present a new proof that this transformation indeed leads to polynomial form of St"{a}ckel Hamiltonians of Benenti type. Moreover we present all geometric ingredients of these Hamiltonians in both Vi`ete and Newton coordinates.
本文讨论了将Benenti型可分离哈密顿量转化为多项式形式的两种正则变换:到Vi′e坐标的变换和到牛顿坐标的变换。到牛顿坐标系的变换直到最近才被应用到这些系统中,在本文中,我们给出了一个新的证明,证明了这种变换确实导致了贝尼蒂型St {{a}克尔哈密顿量的多项式形式。此外,我们给出了这些哈密顿量在牛顿和牛顿坐标系下的所有几何成分。
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引用次数: 0
Advening to adynkrafields: Young tableaux to component fields of the 10D, $mathcal{N}=1$ scalar superfield 逼近标量超场:$mathcal{N}=1$标量超场,年轻的表格到10D的分量场
IF 1.5 4区 物理与天体物理 Q1 Mathematics Pub Date : 2021-01-01 DOI: 10.4310/atmp.2021.v25.n6.a3
S. Gates, Yangrui Hu, S.-N. Hazel Mak
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引用次数: 0
The $mathcal{N}=2$ supersymmetric Calogero–Sutherland model and its eigenfunctions $mathcal{N}=2$超对称Calogero-Sutherland模型及其特征函数
IF 1.5 4区 物理与天体物理 Q1 Mathematics Pub Date : 2021-01-01 DOI: 10.4310/atmp.2021.v25.n3.a1
L. Alarie-Vézina, L. Lapointe, P. Mathieu
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引用次数: 0
Calabi–Yau threefolds in $mathbb{P}^n$ and Gorenstein rings $mathbb{P}^n$和Gorenstein环中的Calabi-Yau三倍
IF 1.5 4区 物理与天体物理 Q1 Mathematics Pub Date : 2020-11-21 DOI: 10.4310/atmp.2022.v26.n3.a7
H. Schenck, M. Stillman, Beihui Yuan
A projectively normal Calabi-Yau threefold $X subseteq mathbb{P}^n$ has an ideal $I_X$ which is arithmetically Gorenstein, of Castelnuovo-Mumford regularity four. Such ideals have been intensively studied when $I_X$ is a complete intersection, as well as in the case where $X$ is codimension three. In the latter case, the Buchsbaum-Eisenbud theorem shows that $I_X$ is given by the Pfaffians of a skew-symmetric matrix. A number of recent papers study the situation when $I_X$ has codimension four. We prove there are 16 possible betti tables for an arithmetically Gorenstein ideal $I$ with $mathrm{codim}(I)=4=mathrm{reg}(I)$, and that exactly 8 of these occur for smooth irreducible nondegenerate threefolds. We investigate the situation in codimension five or more, obtaining examples of $X$ with $h^{p,q}(X)$ not among those appearing for $I_X$ of lower codimension or as complete intersections in toric Fano varieties. A key tool in our approach is the use of inverse systems to identify possible betti tables for $X$.
一个射射正规的Calabi-Yau三倍$X subseteq mathbb{P}^n$具有理想$I_X$,它在算术上是Castelnuovo-Mumford正则性4的Gorenstein。当$I_X$是一个完全相交时,以及$X$是余维三的情况下,这些理想已经被深入研究。在后一种情况下,Buchsbaum-Eisenbud定理表明$I_X$是由偏对称矩阵的Pfaffians给出的。最近的一些论文研究了$I_X$具有余维四的情况。我们证明了$mathrm{codim}(I)=4=mathrm{reg}(I)$的算术Gorenstein理想$I$有16个可能的betti表,而对于光滑不可约非退化三折,正好有8个可能的betti表。我们研究了余维数大于等于5的情况,得到了$X$具有$h^{p,q}(X)$的例子,这些例子不属于低余维数$I_X$出现的例子,也不属于环型Fano变体中的完全交点。我们的方法中的一个关键工具是使用逆系统来识别$X$可能的betti表。
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引用次数: 2
The family of confluent Virasoro fusion kernels and a non-polynomial $q$-Askey scheme 收敛Virasoro融合核族和非多项式$q$-Askey格式
IF 1.5 4区 物理与天体物理 Q1 Mathematics Pub Date : 2020-11-16 DOI: 10.4310/atmp.2021.v25.n6.a5
J. Lenells, J. Roussillon
We study the recently introduced family of confluent Virasoro fusion kernels $mathcal{C}_k(b,boldsymbol{theta},sigma_s,nu)$. We study their eigenfunction properties and show that they can be viewed as non-polynomial generalizations of both the continuous dual $q$-Hahn and the big $q$-Jacobi polynomials. More precisely, we prove that: (i) $mathcal{C}_k$ is a joint eigenfunction of four different difference operators for any positive integer $k$, (ii) $mathcal{C}_k$ degenerates to the continuous dual $q$-Hahn polynomials when $nu$ is suitably discretized, and (iii) $mathcal{C}_k$ degenerates to the big $q$-Jacobi polynomials when $sigma_s$ is suitably discretized. These observations lead us to propose the existence of a non-polynomial generalization of the $q$-Askey scheme. The top member of this non-polynomial scheme is the Virasoro fusion kernel (or, equivalently, Ruijsenaars' hypergeometric function), and its first confluence is given by the $mathcal{C}_k$.
我们研究了最近引入的汇合Virasoro融合核族$mathcal{C}_k(b,boldsymbol{theta},sigma_s,nu)$。我们研究了它们的特征函数性质,并证明它们可以看作是连续对偶$q$ -Hahn多项式和大的$q$ -Jacobi多项式的非多项式推广。更准确地说,我们证明了:(i) $mathcal{C}_k$是任意正整数$k$的四种不同差分算子的联合特征函数,(ii) $mathcal{C}_k$在$nu$适当离散时退化为连续对偶$q$ -Hahn多项式,(iii) $mathcal{C}_k$在$sigma_s$适当离散时退化为大$q$ -Jacobi多项式。这些观察结果使我们提出$q$ -Askey方案的非多项式推广的存在性。该非多项式格式的顶层成员是Virasoro融合核(或等价的rujsenaars的超几何函数),其第一次汇合由$mathcal{C}_k$给出。
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引用次数: 1
Asymptotics of the Banana Feynman amplitudes at the large complex structure limit 大型复杂结构极限下香蕉费曼振幅的渐近性
IF 1.5 4区 物理与天体物理 Q1 Mathematics Pub Date : 2020-11-11 DOI: 10.4310/ATMP.2022.v26.n5.a5
H. Iritani
Recently Bonisch-Fischbach-Klemm-Nega-Safari discovered, via numerical computation, that the leading asymptotics of the l-loop Banana Feynman amplitude at the large complex structure limit can be described by the Gamma class of a degree (1,...,1) Fano hypersurface F in (P^1)^{l+1}. We confirm this observation by using a Gamma-conjecture type result for F.
最近,Bonisch-Fischbach-Klemm-Nega-Safari通过数值计算发现,l-环Banana Feynman振幅在大复杂结构极限处的领先渐近性可以用(1,…,1)次Fano超曲面F in (P^1)^{1 +1}的Gamma类来描述。我们用F的伽玛猜想型结果证实了这一观察。
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引用次数: 3
Topological recursion for the extended Ooguri–Vafa partition function of colored HOMFLY-PT polynomials of torus knots 环面结的有色HOMFLY-PT多项式的扩展Ooguri-Vafa配分函数的拓扑递归
IF 1.5 4区 物理与天体物理 Q1 Mathematics Pub Date : 2020-10-21 DOI: 10.4310/ATMP.2022.v26.n4.a1
P. Dunin-Barkowski, M. Kazarian, A. Popolitov, S. Shadrin, A. Sleptsov
We prove that topological recursion applied to the spectral curve of colored HOMFLY-PT polynomials of torus knots reproduces the n-point functions of a particular partition function called the extended Ooguri-Vafa partition function. This generalizes and refines the results of Brini-Eynard-Marino and Borot-Eynard-Orantin. We also discuss how the statement of spectral curve topological recursion in this case fits into the program of Alexandrov-Chapuy-Eynard-Harnad of establishing the topological recursion for general weighted double Hurwitz numbers partition functions (a.k.a. KP tau-functions of hypergeometric type).
我们证明了将拓扑递归应用于环面结的彩色HOMFLY-PT多项式的谱曲线上,可以再现一种特定配分函数的n点函数,即扩展的Ooguri-Vafa配分函数。这概括和完善了Brini-Eynard-Marino和Borot-Eynard-Orantin的结果。我们还讨论了这种情况下谱曲线拓扑递推的表述如何与Alexandrov-Chapuy-Eynard-Harnad建立一般加权双Hurwitz数配分函数(又称超几何型KP τ函数)拓扑递推的方案相适应。
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引用次数: 11
New structures in gravitational radiation 引力辐射的新结构
IF 1.5 4区 物理与天体物理 Q1 Mathematics Pub Date : 2020-10-14 DOI: 10.4310/atmp.2022.v26.n3.a1
L. Bieri
We investigate the Einstein vacuum equations as well as the Einstein-null fluid equations describing neutrino radiation. We find new structures in gravitational waves and memory for asymptotically-flat spacetimes of slow decay. It has been known that for stronger decay of the data, including data being stationary outside a compact set, gravitational wave memory is finite and of electric parity only. In this article, we investigate general spacetimes that are asymptotically flat in a rough sense. That is, the decay of the data to Minkowski space towards infinity is very slow. As a main new feature, we prove that there exists diverging magnetic memory sourced by the magnetic part of the curvature tensor (a) in the Einstein vacuum and (b) in the Einstein-null-fluid equations. The magnetic memory occurs naturally in the Einstein vacuum setting (a) of pure gravity. In case (b), in the ultimate class of solutions, the magnetic memory contains also a curl term from the energy-momentum tensor for neutrinos also diverging at the aforementioned rate. The electric memory diverges too, it is generated by the electric part of the curvature tensor and in the Einstein-null-fluid situation also by the corresponding energy-momentum component. In addition, we find a panorama of finer structures in these manifolds. Some of these manifest themselves as additional contributions to both electric and magnetic memory. Our theorems hold for any type of matter or energy coupled to the Einstein equations as long as the data decays slowly towards infinity and other conditions are satisfied. The new results have a multitude of applications ranging from mathematical general relativity to gravitational wave astrophysics, detecting dark matter and other topics in physics.
我们研究了描述中微子辐射的爱因斯坦真空方程和爱因斯坦零流体方程。我们在缓慢衰减的渐近平坦时空的引力波和记忆中发现了新的结构。众所周知,对于数据的更强衰减,包括在紧集之外的静止数据,引力波记忆是有限的,并且只有电宇称。在这篇文章中,我们研究了在粗略意义上渐近平坦的一般时空。也就是说,数据向闵可夫斯基空间的无穷衰减是非常缓慢的。作为一个主要的新特征,我们证明了在爱因斯坦真空中(a)和在爱因斯坦-零流体方程中(b)曲率张量的磁性部分存在发散磁记忆。磁记忆在纯重力的爱因斯坦真空环境(a)中自然发生。在情形(b)中,在终极解类中,磁记忆也包含一个旋度项,它来自中微子的能量动量张量,也以上述速率发散。电记忆也是发散的,它是由曲率张量的电部分产生的,在爱因斯坦-零流体情况下,它也是由相应的能量-动量分量产生的。此外,我们还在这些流形中发现了更精细的结构全景。其中一些表现为对电记忆和磁记忆的额外贡献。我们的定理适用于与爱因斯坦方程耦合的任何类型的物质或能量,只要数据缓慢地向无限衰减并且满足其他条件。新的结果有大量的应用,从数学广义相对论到引力波天体物理学,探测暗物质和其他物理学主题。
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引用次数: 3
Lorentz Meets Lipschitz 洛伦兹和利普希兹相遇
IF 1.5 4区 物理与天体物理 Q1 Mathematics Pub Date : 2020-09-18 DOI: 10.4310/ATMP.2021.v25.n8.a4
Christian Lange, A. Lytchak, Clemens Samann
We show that maximal causal curves for a Lipschitz continuous Lorentzian metric admit a $mathcal{C}^{1,1}$-parametrization and that they solve the geodesic equation in the sense of Filippov in this parametrization. Our proof shows that maximal causal curves are either everywhere lightlike or everywhere timelike. Furthermore, the proof demonstrates that maximal causal curves for an $alpha$-Holder continuous Lorentzian metric admit a $mathcal{C}^{1,frac{alpha}{4}}$-parametrization.
我们证明了Lipschitz连续洛伦兹度规的最大因果曲线允许$mathcal{C}^{1,1}$ -参数化,并在该参数化中解出了Filippov意义上的测地方程。我们的证明表明,最大因果曲线要么处处是类光曲线,要么处处是类时曲线。进一步证明了$alpha$ -Holder连续洛伦兹度量的最大因果曲线允许$mathcal{C}^{1,frac{alpha}{4}}$ -参数化。
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引用次数: 9
Convergence of eigenstate expectation values with system size 特征态期望值随系统大小的收敛性
IF 1.5 4区 物理与天体物理 Q1 Mathematics Pub Date : 2020-09-10 DOI: 10.4310/ATMP.2022.v26.n6.a5
Yichen Huang
Understanding the asymptotic behavior of physical quantities in the thermodynamic limit is a fundamental problem in statistical mechanics. In this paper, we study how fast the eigenstate expectation values of a local operator converge to a smooth function of energy density as the system size diverges. In translationally invariant systems in any spatial dimension, we prove that for all but a measure zero set of local operators, the deviations of finite-size eigenstate expectation values from the aforementioned smooth function are lower bounded by $1/O(N)$, where $N$ is the system size. The lower bound holds regardless of the integrability or chaoticity of the model, and is tight in systems satisfying the eigenstate thermalization hypothesis.
理解物理量在热力学极限下的渐近行为是统计力学中的一个基本问题。本文研究了局部算子的特征态期望值随系统大小的发散收敛到能量密度光滑函数的速度。在任意空间维度的平移不变系统中,我们证明了对于除测度零外的所有局部算子集,有限大小的特征态期望值与上述光滑函数的偏差下界为$1/O(N)$,其中$N$为系统大小。无论模型的可积性还是混沌性,下界都成立,并且在满足本征态热化假设的系统中是紧的。
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引用次数: 1
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Advances in Theoretical and Mathematical Physics
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