Driving-Induced Symmetry Breaking in the Spin-Boson System

A symmetric dissipative two-state system is asymptotically completely delocalized independent of the initial state. We show that driving-induced localization at long times can take place when both the bias and tunneling coupling energy are harmonically modulated. Dynamical symmetry breaking on avera...

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Bibliographic Details
Main Authors Adam, Holger, Winterstetter, Manfred, Grifoni, Milena, Weiss, Ulrich
Format Journal Article
LanguageEnglish
Published 04.06.1999
Subjects
Physics - Statistical Mechanics
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Summary:A symmetric dissipative two-state system is asymptotically completely delocalized independent of the initial state. We show that driving-induced localization at long times can take place when both the bias and tunneling coupling energy are harmonically modulated. Dynamical symmetry breaking on average occurs when the driving frequencies are odd multiples of some reference frequency. This effect is universal, as it is independent of the dissipative mechanism. Possible candidates for an experimental observation are flux tunneling in the variable barrier rf SQUID and magnetization tunneling in magnetic molecular clusters.
DOI:10.48550/arxiv.cond-mat/9906062