Pure Phase Decoherence in a Ring Geometry

Details Pure Phase Decoherence in a Ring Geometry Pure Phase Decoherence in a Ring Geometry

2009-09-22

arxiv.org/abs/0909.4098v3

Physics

Quantum Physics

17 pages, 6 figures, accepted by Phys. Rev. A

Scientific paper

We study the dynamics of pure phase decoherence for a particle hopping around an N-site ring, coupled both to a spin bath and to an Aharonov-Bohm flux which threads the ring. Analytic results are found for the dynamics of the influence functional and of the reduced density matrix of the particle, both for initial single wave-packet states, and for states split initially into 2 separate wave-packets moving at different velocities. We also give results for the dynamics of the current as a function of time.

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