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2013
Impact Factor

# Semen Shlosman

CNRS, CPT, Marseille, France
Aix Marseille Univ, Universite de Toulon

## Publications:

 Dobrokhotov S. Y., Minenkov D. S., Neishtadt A. I., Shlosman S. B. Classical and Quantum Dynamics of a Particle in a Narrow Angle 2019, vol. 24, no. 6, pp.  704-716 Abstract We consider the 2D Schrödinger equation with variable potential in the narrow domain diffeomorphic to the wedge with the Dirichlet boundary condition. The corresponding classical problem is the billiard in this domain. In general, the corresponding dynamical system is not integrable. The small angle is a small parameter which allows one to make the averaging and reduce the classical dynamical system to an integrable one modulo exponential small correction. We use the quantum adiabatic approximation (operator separation of variables) to construct the asymptotic eigenfunctions (quasi-modes) of the Schr¨odinger operator. We discuss the relation between classical averaging and constructed quasi-modes. The behavior of quasi-modes in the neighborhood of the cusp is studied. We also discuss the relation between Bessel and Airy functions that follows from different representations of asymptotics near the cusp. Keywords: potential well, stationary Schrödinger equation, KAM theory, operator separation of variables, semiclassical asymptotics, Airy function, Bessel function Citation: Dobrokhotov S. Y., Minenkov D. S., Neishtadt A. I., Shlosman S. B.,  Classical and Quantum Dynamics of a Particle in a Narrow Angle, Regular and Chaotic Dynamics, 2019, vol. 24, no. 6, pp. 704-716 DOI:10.1134/S156035471906008X