Dephasing via stochastic absorption: A case study in Aharonov-Bohm oscillations

Details Dephasing via stochastic absorption: A case study in Aharonov-Bohm oscillations Dephasing via stochastic absorption: A case study in Aharonov-Bohm oscillations

2001-12-10

arxiv.org/abs/cond-mat/0112153v2

Phys. Rev. B 65, 153309 (2002).

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures Minor corrections made and journal reference added

Scientific paper

10.1103/PhysRevB.65.153309

The Aharonov-Bohm ring has been the mainstay of mesoscopic physics research since its inception. In this paper we have dwelt on the problem of dephasing of AB oscillations using a phenomenological model based on stochastic absorption. To calculate the conductance in the presence of inelastic scattering we have used the method due to Brouwer and Beenakker. We have shown that conductance is symmetric under flux reversal and visibility of AB oscillations decay to zero as a function of the incoherence parameter thus signalling dephasing in the system. Some comments are made on the relative merits of stochastic absorption with respect to optical potential model, which have been used to mimic dephasing.

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