Dephasing due to a fluctuating fractional quantum Hall edge current

Details Dephasing due to a fluctuating fractional quantum Hall edge current Dephasing due to a fluctuating fractional quantum Hall edge current

2007-04-11

arxiv.org/abs/0704.1443v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Proceedings of the 6th Rencontres du Vietnam (2006)

Scientific paper

The dephasing rate of an electron level in a quantum dot, placed next to a fluctuating edge current in the fractional quantum Hall effect, is considered. Using perturbation theory, we first show that this rate has an anomalous dependence on the bias voltage applied to the neighboring quantum point contact, because of the Luttinger liquid physics which describes the fractional Hall fluid. Next, we describe exactly the weak to strong backscattering crossover using the Bethe-Ansatz solution.

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