On the calculation of exact sum rules of rational order for quantum billiards

High energy semiclassical wave functions in rational multi-connected and other (Sinai-like) billiards determined by their periodic orbits

The methods of the high energy semiclassical quantization in the rational polygon billiards used in our earlier papers are generalized to an arbitrary rational multi-connected polygon billiards i.e. to the billiards which is a rational polygon with other rational polygons inside them "rotated" with respect to the "mother" ones by rational angles. The respective procedure is described fully and its most important aspects are discussed. This generalization allows us to apply the method to arbitrary billiards with curved boundaries and with multi-connected areas where the respective semiclassical…

On the calculation of exact sum rules of rational order for quantum billiards (spectrum with a null eigenvalue)

We generalize the calculation of Ref.~\cite{Amore19B} to the case of a spectrum containing a zero mode. Using a renormalization procedure, we express the sum rules in terms of suitable traces and show that the final expressions, calculated up to second order in perturbation theory agree with the results obtained when working directly with the eigenvalues and using Rayleigh-Schrödinger perturbation theory.

Exact sum rules for quantum billiards of arbitrary shape

We have derived explicit expressions for the sum rules of order one of the eigenvalues of the negative Laplacian on two dimensional domains of arbitrary shape. Taking into account the leading asymptotic behavior of these eigenvalues, as given from Weyl's law, we show that it is possible to define sum rules that are finite, using different prescriptions. We provide the explicit expressions and test them on a number of non trivial examples, comparing the exact results with precise numerical results.

有理多边形台球中的混沌动力学

On Chaotic Dynamics in Rational Polygonal Billiards

我们讨论了有理多边形台球中与可积性和混沌特征相关的分段线正则边界效应和顶角奇异边界效应之间的相互作用。多边形中规则和不规则运动的有争议的问题的处理方法是在确定性和随机性的框架内进行的。分析的台球壁碰撞分布和粒子的生存概率，分别在封闭和弱开多边形模拟。在多顶点多边形中，后期的壁碰撞事件导致圆形的规则的周期性轨迹（滑动轨道），这在开放台球的情况下可能被转化为幸存的集体激发（涡）。在弱开多边形中，滑动轨道和涡旋与相应的圆台球中的规则轨道没有拓扑相似性，通过普适和非普适弛豫动力学可以很好地区分滑动轨道和涡旋.

Scarred quasimodes on translation surfaces

Rational polygonal billiards are one of the key models among the larger class of pseudo-integrable billiards. Their billiard flow may be lifted to the geodesic flow on a translation surface. Whereas such classical billiards have been much studied in the literature, the analogous quantum billiards have received much less attention. This paper is concerned with a conjecture of Bogomolny and Schmit who proposed in 2004 that the eigenfunctions of the Laplacian on rational polygonal billiards ought to become localized along a finite number of vectors in momentum space, as the eigenvalue tends to in…

From Classical Periodic Orbits in Integrable $π$-Rational Billiards to Quantum Energy Spectrum

In the present note, we uncover a remarkable connection between the length of periodic orbit of a classical particle enclosed in a class of 2-dimensional planar billiards and the energy of a quantum particle confined to move in an identical region with infinitely high potential wall on the boundary. We observe that the quantum energy spectrum of the particle is in exact one-to-one correspondence with the spectrum of the amplitude squares of the periodic orbits of a classical particle for the class of integrable billiards considered. We have established the results by geometric constructions an…