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Shot-Noise Thermometry of the Quantum Hall Edge States

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Published in Physical Review Letters. 2012, vol. 109, no. 24
Abstract We use the nonequilibrium bosonization technique to investigate the effects of the Coulomb interaction on quantum Hall edge states at a filling factor ν=2, partitioned by a quantum point contact (QPC). We find that, due to the integrability of charge dynamics, edge states evolve to a nonequilibrium stationary state with a number of specific features. In particular, the noise temperature Θ of a weak backscattering current between edge channels is linear in voltage bias applied at the QPC, independently of the interaction strength. In addition, it is a nonanalytical function of the QPC transparency T and scales as Θ∝Tln(1/T) at T≪1. Our predictions are confirmed by exact numerical calculations.
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LEVKIVSKYI, Ivan, SUKHORUKOV, Eugene. Shot-Noise Thermometry of the Quantum Hall Edge States. In: Physical Review Letters, 2012, vol. 109, n° 24. doi: 10.1103/PhysRevLett.109.246806 https://archive-ouverte.unige.ch/unige:36328

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Deposited on : 2014-05-05

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