Negative Delta-T Noise in the Fractional Quantum Hall Effect.

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