Interaction-Induced Quantum Dephasing in Mesoscopic Rings
Dmitri S. Golubev, Carlos P. Herrero, Andrei D. Zaikin
Abstract
Combining nonperturbative techniques with Monte Carlo simulations we demonstrate that quantum coherence effects for a particle on a ring are suppressed beyond a finite length Lϕ even at zero temperature if the particle is coupled to a diffusive electron gas by means of long range Coulomb interaction. This length is consistent with Lϕ derived from weak-localization-type of analysis.
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