Decoherence of fermions subject to a quantum bath

Details Decoherence of fermions subject to a quantum bath Decoherence of fermions subject to a quantum bath

2006-04-27

arxiv.org/abs/cond-mat/0604626v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages, 6 figures; invited talk at the German March Meeting 2006; to be published in "Advances in Solid State Physics", Vol.

Scientific paper

The destruction of quantum-mechanical phase coherence by a fluctuating quantum bath has been investigated mostly for a single particle. However, for electronic transport through disordered samples and mesoscopic interference setups, we have to treat a many-fermion system subject to a quantum bath. Here, we review a novel technique for treating this situation in the case of ballistic interferometers, and discuss its application to the electronic Mach-Zehnder setup. We use the results to bring out the main features of decoherence in a many-fermion system, and briefly discuss the same ideas in the context of weak localization.

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