Phys. Rev. Lett. 87, 140404 (2001) [4 pages]Periodic Orbit Description of Nonadiabatic Quantum Dynamics |
Stefan Dilthey and Gerhard Stock *
Theoretical Quantum Dynamics, Faculty of Physics, University Freiburg, D-79104 Freiburg, Germany
Received 20 February 2001; published 14 September 2001
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.
©2001 The American Physical Society
URL: http://link.aps.org/abstract/PRL/v87/e140404
DOI: 10.1103/PhysRevLett.87.140404
PACS: 03.65.Sq, 05.45.Mt, 24.60.Lz, 31.15.Gy
* Present address: Institute of Physical and Theoretical Chemistry, J. W. Goethe University, Marie-Curie-Strasse 11, D-60439 Frankfurt, Germany.
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