Interaction and Quantum Decoherence in Disordered Conductors

Details Interaction and Quantum Decoherence in Disordered Conductors Interaction and Quantum Decoherence in Disordered Conductors

1999-11-19

arxiv.org/abs/cond-mat/9911316v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages. Invited talk at LT-22 (Helsinki, August 4-11, 1999). To be published in Physica B (March/April 2000). The paper provi

Scientific paper

10.1016/S0921-4526(99)01834-7

We present a nonperturbative approach which allows to evaluate the weak localization correction to the conductivity of disordered conductors in the presence of interactions. The effect of the electron-electron interaction on the magnetoconductance is described by the function A(t)\exp (-f(t)). The dephasing time is determined only by f(t), and this time remains finite down to T=0 due to the electron-electron interactions. In order to establish the relation between our nonperturbative analysis and the perturbative results the effect of interaction on the pre-exponent A(t) should be taken into account. The dephasing time cannot be unambiguously determined from a perturbative calculation.

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