Article Dans Une Revue Physical Review Letters Année : 2020

Negative Delta-T Noise in the Fractional Quantum Hall Effect

Résumé

We study the current correlations of fractional quantum Hall edges at the output of a quantum point contact subjected to a temperature gradient. This out-of-equilibrium situation gives rise to a form of temperature-activated shot noise, dubbed delta-T noise. We show that the tunneling of Laughlin quasiparticles leads to a negative delta-T noise, in stark contrast with electron tunneling. Moreover, varying the transmission of the quantum point contact or applying a voltage bias across the Hall bar may flip the sign of this noise contribution, yielding signatures that can be accessed experimentally.

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hal-02919436 , version 1 (22-08-2020)

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Jérôme Rech, T. Jonckheere, B. Grémaud, T. Martin. Negative Delta-T Noise in the Fractional Quantum Hall Effect. Physical Review Letters, 2020, 125 (8), pp.086801. ⟨10.1103/PhysRevLett.125.086801⟩. ⟨hal-02919436⟩
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