Influence Functional for Decoherence of Interacting Electrons in Disordered Conductors

Jan von Delft

doi:10.1142/s0217979208039083

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Influence Functional for Decoherence of Interacting Electrons in Disordered Conductors

Jan von Delft

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Abstract

We have rederived the controversial influence functional approach of Golubev and Zaikin (GZ) for interacting electrons in disordered metals in a way that allows us to show its equivalence, before disorder averaging, to diagrammatic Keldysh perturbation theory. By representing a certain Pauli factor (1-2 rho) occuring in GZ's effective action in the frequency domain (instead of the time domain, as GZ do), we also achieve a more accurate treatment of recoil effects. With this change, GZ's approach reproduces, in a remarkably simple way, the standard, generally accepted result for the decoherence rate. -- The main text and appendix A.1 to A.3 of the present paper have already been published previously; for convenience, they are included here again, together with five additional, lengthy appendices containing relevant technical details.

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Jan von Delft. 2008-04-10. Influence Functional for Decoherence of Interacting Electrons in Disordered Conductors. https://doi.org/10.1142/s0217979208039083

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