title: Periodic orbit description of nonadiabatic quantum dynamics.
abstract: Classical periodic orbits associated with the nonadiabatic dynamics of a spin-boson-type problem are introduced. To facilitate a classical description of spin states, the formulation employs an exact mapping of the discrete quantum variables onto continuous degrees of freedom. Adopting a one-dimensional spin-boson model, the shortest periodic orbits of the problem are identified and used to analyze the nonadiabatic quantum dynamics. The possibility of directly observing these vibronic periodic orbits in femtosecond time-resolved experiments is discussed.
authors.affiliation: Theoretical Quantum Dynamics, Faculty of Physics, University Freiburg, D-79104 Freiburg, Germany.
authors.forename: S
authors.initials: S
authors.lastname: Dilthey
authors.forename: G
authors.initials: G
authors.lastname: Stock