Monte Carlo study of particle renormalizations in the presence of dissipative environments

Victor Kagalovsky, Baruch Horovitz

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9 Scopus citations

Abstract

We study the Aharonov-Bohm oscillations of a charged particle on a ring of radius R coupled to a dirty metal environment. With Monte Carlo methods we evaluate the curvature of these oscillations which has the form 1/M* R2, where M* is an effective mass. We find that at low temperatures T the curvature approaches at large R>l an R independent M* >M, where l is the mean free path in the metal. This behavior is also consistent with perturbation theory in the particle-metal coupling parameter. At finite temperature T we identify dephasing lengths that scale as T-1 at R≳l and as T-1/4 at R≪l.

Original languageEnglish
Article number125322
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume78
Issue number12
DOIs
StatePublished - 25 Sep 2008

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