An effective theory for conductance by symmetry breaking

2000/01/05 by Sebastiao Correia, Correia, Sebastiao, János Polonyi +5
Computer Science · Physics and Astronomy · #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum many-body systems #cond-mat.dis-nn #cond-mat.str-el #hep-th

paper · pdf · doi:10.48550/arxiv.cond-mat/0001053

18 pages, more explanation added

arxiv created 2000/10/16 · arxiv updated 2009/11/30

Abstract

An effective theory is suggested for the particle-anti particle and the particle-particle modes of strongly disordered electron systems. The effective theory is studied in the framework of the saddle point expansion and found to support a vacuum which is not invariant under translations in imaginary time. The Goldstone bosons of this symmetry breaking generate a pole in the density-density correlation function. The condensate of the auxiliary field corresponding to the particle-particle channel produces conductivity without relying on the long range fluctuations. The results are obtained for d>1.

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