Dephasing of a particle in a dissipative environment

Abstract

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.

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

References in corpus (13)

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Cited by in corpus (6)

• Particle renormalizations in presence of dissipative environments
• Persistent current noise and electron-electron interactions
• Persistent currents in nanorings and quantum decoherence by Coulomb interaction
• Renormalization of the dephasing by zero point fluctuations
• The dephasing rate formula in the many body context
• Persistent current noise in normal and superconducting nanorings