Violation of the fluctuation-dissipation theorem in time-dependent mesoscopic heat transport

Details Violation of the fluctuation-dissipation theorem in time-dependent mesoscopic heat transport Violation of the fluctuation-dissipation theorem in time-dependent mesoscopic heat transport

2010-03-10

arxiv.org/abs/1003.2146v1

Phys. Rev. Lett. 104, 220601 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 1 figure

Scientific paper

We have analyzed the spectral density of fluctuations of the energy flux through a mesoscopic constriction between two equilibrium reservoirs. It is shown that at finite frequencies, the fluctuating energy flux is not related to the thermal conductance of the constriction by the standard fluctuation-dissipation theorem, but contains additional noise. The main physical consequence of this extra noise is that the fluctuations do not vanish at zero temperature together with the vanishing thermal conductance.

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