SELF-TRAPPING IN AN ASYMMETRIC TWO-SITE HOLSTEIN MODEL

Autor:	C. A. Bustamante, M. I. Molina
Rok vydání:	2003
Předmět:	Physics Semiclassical physics Statistical and Nonlinear Physics Trapping Electron Condensed Matter Physics Electron localization function symbols.namesake Quantum mechanics Principal quantum number symbols Nonlinear Schrödinger equation Quantum Quantum tunnelling
Zdroj:	International Journal of Modern Physics B. 17:2281-2298
ISSN:	1793-6578 0217-9792
DOI:	10.1142/s0217979203018144
Popis:	We examine numerically the long-time average probability in a two-site system, for finding an electron staying at an initially occupied site for an asymmetric quantum Holstein electron-phonon coupled model. The principal finding is the existence of quantum-mechanical resonant tunnelling channels in the electron localization phenomenon. Based on a strong-coupling perturbative analysis, we have explained the presence of the channels as a consequence of a general resonant effect on an effective two-level system. Finally, a comparison of the quantum problem with the semiclassical description given by the Discrete Nonlinear Schrödinger equation is performed.
Databáze:	OpenAIRE
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