title: Semiclassical quantization of nonadiabatic systems with hopping periodic orbits.
abstract: We present a semiclassical quantization condition, i.e., quantum-classical correspondence, for steady states of nonadiabatic systems consisting of fast and slow degrees of freedom (DOFs) by extending Gutzwiller's trace formula to a nonadiabatic form. The quantum-classical correspondence indicates that a set of primitive hopping periodic orbits, which are invariant under time evolution in the phase space of the slow DOF, should be quantized. The semiclassical quantization is then applied to a simple nonadiabatic model and accurately reproduces exact quantum energy levels. In addition to the semiclassical quantization condition, we also discuss chaotic dynamics involved in the classical limit of nonadiabatic dynamics.
authors.affiliation: Department of Chemical System Engineering, School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan.
authors.forename: Mikiya
authors.initials: M
authors.lastname: Fujii
authors.affiliation: Department of Chemical System Engineering, School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan.
authors.forename: Koichi
authors.initials: K
authors.lastname: Yamashita