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Type: Artigo de periódico
Title: Semiclassical approximations to the coherent-state propagator for a particle in a box
Author: Xavier, AL
deAguiar, MAM
Abstract: We compute the semiclassical coherent-state propagator for a particle moving in a one-dimensional box. In this semiclassical approach complex trajectories are stationary paths of the propagator's asymptotic expansion and play a fundamental role. A second semiclassical approximation is also introduced, which makes use of real trajectories only. An application to a seemingly simple system, the infinite well, is carried out completely for the diagonal elements, and a comparison is made among the three possible methods, those based on complex and real trajectories and the 'exact case' that is determined by decomposing the propagator into its eigenstates.
Country: EUA
Editor: American Physical Soc
Citation: Physical Review A. American Physical Soc, v. 54, n. 3, n. 1808, n. 1819, 1996.
Rights: aberto
Identifier DOI: 10.1103/PhysRevA.54.1808
Date Issue: 1996
Appears in Collections:Unicamp - Artigos e Outros Documentos

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