Dephasing of a particle in a dissipative environment

Details Dephasing of a particle in a dissipative environment Dephasing of a particle in a dissipative environment

2007-08-07

arxiv.org/abs/0708.0965v2

J. Phys. A 40 12281 (2007).

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

18 pages, 2 figures, some textual improvements, to be published in JPA

Scientific paper

10.1088/1751-8113/40/41/002

The motion of a particle in a ring of length L is influenced by a dirty metal environment whose fluctuations are characterized by a short correlation distance $\ell << L$. We analyze the induced decoherence process, and compare the results with those obtained in the opposing Caldeira-Leggett limit ($\ell >> L$). A proper definition of the dephasing factor that does not depend on a vague semiclassical picture is employed. Some recent Monte-Carlo results about the effect of finite temperatures on "mass renormalization" in this system are illuminated.

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