Semiclassical Motion of Systems with Internal States |
| S. Stenholm Research Institute for Theoretical Physics and the Academy of Finland, P.O. Box 9 (Siltavuorenpenger 20C), 00014 University Of Helsinki, Finland |
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| In many fields of atomic and molecular physics we need to combine the center-of-mass motion with internal degrees of freedom. In this work, the classical motion in phase space is separated from the quantum processes by a multiple-time-scale approach. The expansion parameter is proportional to Planck's constant. The theory is given and illustrated by examples: the semiclassical description of a particle without internal states, the extraction of a classical trajectory and the derivation of the light-induced force. |
| DOI: 10.12693/APhysPolA.86.51 PACS numbers: 03.65.Sq, 32.80.Pj |