Noise through Quantum Pumps

Details Noise through Quantum Pumps Noise through Quantum Pumps

2002-02-14

arxiv.org/abs/cond-mat/0202241v1

Phys. Rev. B 65, 245314 (2002)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

10 pages, 5 Postscript figures

Scientific paper

10.1103/PhysRevB.65.245314

We study the current noise through an unbiased quantum electron pump and its mesoscopic fluctuations for arbitrary temperatures and beyond the bilinear response. In the bilinear regime, we find the full distributions of the noise power and the current-to-noise ratio for a chaotic quantum dots with single-channel and many-channel ballistic point contacts. For a dot with many-channel point contacts we also calculate the ensemble-averaged noise at arbitrary temperature and pumping strength. In the limit of strong pumping, a new temperature scale appears that corresponds to the broadening of the electron distribution function in the dot as a result of the time-dependent perturbations.

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