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Recent investigations of fractal conductance fluctuations (FCF) in electron billiards reveal crucial discrepancies between experimental behavior and the semiclassical Landauer-Buttiker (SLB) theory that predicted their existence. In…

Eigenfunctions of integrable planar billiards are studied - in particular, the number of nodal domains, $\nu$, of the eigenfunctions are considered. The billiards for which the time-independent Schr\"odinger equation (Helmholtz equation) is…

Exactly Solvable and Integrable Systems · Physics 2016-04-25 Rhine Samajdar , Sudhir R. Jain

A "quasiclassical" approximation to the quantum spectrum of the Schroedinger equation is obtained from the trace of a quasiclassical evolution operator for the "hydrodynamical" version of the theory, in which the dynamical evolution takes…

chao-dyn · Physics 2009-10-28 Predrag Cvitanovic , Gabor Vattay , Andreas Wirzba

A new algorithm for determining the eigenstates of n-dimensional billiards is presented. It is based on the application of the Cauchy theorem for the determination of the null space of the boundary overlap matrix. The method is free from…

Computational Physics · Physics 2007-05-23 Aurel Bulgac , Piotr Magierski

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…

Quantum Physics · Physics 2019-12-10 Stefan Giller

We introduce a boundary integral method for two-dimensional quantum billiards subjected to a constant magnetic field. It allows to calculate spectra and wave functions, in particular at strong fields and semiclassical values of the magnetic…

chao-dyn · Physics 2009-10-31 Klaus Hornberger , Uzy Smilansky

We study chaotic eigenfunctions in wedge-shaped and rectangular regions using a generalization of Berry's conjecture. An expression for the two-point correlation function is derived and verified numerically.

Quantum Physics · Physics 2009-11-07 W. E. Bies , N. Lepore , E. J. Heller

The classical mechanics, exact quantum mechanics and semiclassical quantum mechanics of the billiard in the triaxial ellipsoid is investigated. The system is separable in ellipsoidal coordinates. A smooth description of the motion is given…

chao-dyn · Physics 2007-05-23 Holger Waalkens , Jan Wiersig , Holger R. Dullin

In this note, we extend the results on eigenfunction concentration in billiards as proved by the third author in \cite{M1}. There, the methods developed in Burq-Zworski \cite{BZ3} to study eigenfunctions for billiards which have rectangular…

Analysis of PDEs · Mathematics 2008-09-29 Andrew Hassell , Luc Hillairet , Jeremy Marzuola

In billiard systems with a flux line semiclassical approximations for the density of states contain contributions from periodic orbits as well as from diffractive orbits that are scattered on the flux line. We derive a semiclassical…

chao-dyn · Physics 2010-03-09 Martin Sieber

Recently semiclassical approximations have been successfully applied to study the effect of a superconducting lead on the density of states and conductance in ballistic billiards. However, the summation over classical trajectories involved…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 Oleg Zaitsev

We present a semiclassical theory for transport through open billiards of arbitrary convex shape that includes diffractively scattered paths at the lead openings. Starting from a Dyson equation for the semiclassical Green's function we…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 C. Stampfer , L. Wirtz , S. Rotter , J. Burgdoerfer

Semiclassical approximations often involve the use of stationary phase approximations. This method can be applied when $\hbar$ is small in comparison to relevant actions or action differences in the corresponding classical system. In many…

chao-dyn · Physics 2009-10-28 Martin Sieber

For the representation of eigenstates on a Poincar\'e section at the boundary of a billiard different variants have been proposed. We compare these Poincar\'e Husimi functions, discuss their properties and based on this select one…

Chaotic Dynamics · Physics 2009-11-10 A. Bäcker , S. Fürstberger , R. Schubert

In a recent letter [Phys. Rev. Lett. {\bf 100}, 164101 (2008)] and within the context of quantized chaotic billiards, random plane wave and semiclassical theoretical approaches were applied to an example of a relatively new class of…

Mesoscale and Nanoscale Physics · Physics 2013-05-29 Denis Ullmo , Steven Tomsovic , Arnd Baecker

A particular case of the famous quasispecies model - the Crow-Kimura model with a permutation invariant fitness landscape - is investigated. Using the fact that the mutation matrix in the case of a permutation invariant fitness landscape…

Populations and Evolution · Quantitative Biology 2014-08-21 Alexander S. Bratus , Artem S. Novozhilov , Yuri S. Semenov

The validity of the retracing approximation in the semiclassical quantization of Andreev billiards is investigated. The exact energy spectrum and the eigenstates of normal-conducting, ballistic quantum dots in contact with a superconductor…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 F. Libisch , S. Rotter , J. Burgdoerfer

We present a comprehensive semiclassical investigation of the three-dimensional Sinai billiard, addressing a few outstanding problems in "quantum chaos". We were mainly concerned with the accuracy of the semiclassical trace formula in two…

chao-dyn · Physics 2007-05-23 Harel Primack , Uzy Smilansky

We study the quantum fermionic billiard defined by the dynamics of a quantized supersymmetric squashed three-sphere (Bianchi IX cosmological model within D=4 simple supergravity). The quantization of the homogeneous gravitino field leads to…

General Relativity and Quantum Cosmology · Physics 2017-07-05 Thibault Damour , Philippe Spindel

Cosmological billiards arise as a map of the solution of the Einstein equations, when the most general symmetry for the metric tensor is hypothesized, and points are considered as spatially decoupled in the asymptotic limit towards the…

General Relativity and Quantum Cosmology · Physics 2023-10-09 Orchidea Maria Lecian