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Dephasing due to a fluctuating fractional quantum Hall edge current

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arxiv 0704.1443 v1 pith:YTFPHFXU submitted 2007-04-11 cond-mat.mes-hall

Dephasing due to a fluctuating fractional quantum Hall edge current

T.K.T Nguyen , A. Crepieux , T. Jonckheere , A.V. Nguyen , Y. Levinson , T. Martin This is my paper
classification cond-mat.mes-hall
keywords quantumfractionalhallcurrentdephasingedgefluctuatingnext
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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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