Detection of finite frequency photo-assisted shot noise with a resonant circuit - Condensed Matter > Mesoscale and Nanoscale PhysicsReportar como inadecuado




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Abstract: Photo-assisted transport through a mesoscopic conductor occurs when anoscillatory AC voltage is superposed to the constant DC bias which isimposed on this conductor. Of particular interest is the photo assisted shotnoise, which has been investigated theoretically and experimentally for severaltypes of samples. For DC biased conductors, a detection scheme for finitefrequency noise using a dissipative resonant circuit, which is inductivelycoupled to the mesoscopic device, was developped recently. We argue that thedetection of the finite frequency photo-assisted shot noise can be achievedwith the same setup, despite the fact that time translational invariance isabsent here. We show that a measure of the photo-assisted shot noise can beobtained through the charge correlator associated with the resonant circuit,where the latter is averaged over the AC drive frequency. We test ourpredictions for a point contact placed in the fractional quantum Hall effectregime, for the case of weak backscattering. The Keldysh elements of thephoto-assisted noise correlator are computed. For simple Laughlin fractions,the measured photo-assisted shot noise displays peaks at the frequencycorresponding to the DC bias voltage, as well as satellite peaks separated bythe AC drive frequency.



Autor: Denis Chevallier CPT, Thibaut Jonckheere CPT, Elisabetta Paladino MATIS, Giuseppe Falci MATIS, Thierry Martin CPT

Fuente: https://arxiv.org/







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