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Title:First-Principles Study of Electronic Structure and Optical Properties of Semiconductor Surfaces Unified Approach for Exact Calculation of Coupling Coefficients of Quantum Angular Momenta
Author(s):Wei, Liqiang
Doctoral Committee Chair(s):Y.-C. Chang
Department / Program:Chemistry
Degree Granting Institution:University of Illinois at Urbana-Champaign
Subject(s):Physics, Elementary Particles and High Energy
Abstract:We present accurate results for the dynamics of an initially localized two-level (TLS) system coupled to a generic dissipative environment and driven by a periodic force which in the semiclassical limit is equivalent to a continuous-wave electromagnetic field. The time evolution is calculated via iterative evaluation of the path integral. We show that in the case where the temperature of the environment is high with respect to the energy splitting of the tunneling doublet, the delocalization rate is largely independent of the friction of the environment and of the specifics of the driving force, depending only on its overall strength. This robust behavior implies that localized states can be stabilized in these systems without much finetuning of external conditions. Our numerical results are interpreted in light of non-adiabatic rate theory.
Issue Date:1998
Description:170 p.
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1998.
Other Identifier(s):(MiAaPQ)AAI9921751
Date Available in IDEALS:2015-09-25
Date Deposited:1998

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