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Title:Effects of dissipative environments on some quantum systems
Author(s):Ao, Ping
Doctoral Committee Chair(s):Leggett, Anthony J.
Department / Program:Physics
Subject(s):environmental influence
persistent current
metallic ring
escape rate
helium surface
Landau-Zener crossing
quantum systems
Abstract:The properties of a system coupled to an environment can be dramatically changed compared to those of the isolated case. In this thesis I present a theoretical study of environmental influence on the following physical phenomena: the persistent current of a metallic ring, the escape rate of an electron from a helium surface, and the transition probability of the Landau-Zener level crossing. Chapter one contains a general introduction to these physical systems and a brief review of the theoretical methods I shall use. The study of an equilibrium property, the persistent current of a metallic ring coupled to an environment, is in chapter two. Chapter three describes the effects of an environment on the escape of electrons from a helium surface. In chapter four a detailed study of the Landau-Zener level crossing problem with a dissipative environment is presented. Finally, in chapter five I propose some questions that need further theoretical consideration.
Issue Date:1991
Genre:Dissertation / Thesis
Rights Information:1991 Ping Ao
Date Available in IDEALS:2011-05-12
Identifier in Online Catalog:3476374

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