Kinetic theory of fluctuations in conducting systems

Details Kinetic theory of fluctuations in conducting systems Kinetic theory of fluctuations in conducting systems

2004-03-17

arxiv.org/abs/cond-mat/0403436v2

Phys. Rev. B 71, 085118 (2005)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 2 figures

Scientific paper

10.1103/PhysRevB.71.085118

We propose an effective field theory describing the time dependent fluctuations of electrons in conducting systems, generalizing the well known kinetic theory of fluctuations. On several examples, we show its equivalence, (when quantum corrections are neglected) to a microscopic quantum mechanical non-linear $\sigma$-model theory. We apply then the theory to analyze the effects of strong electron-electron and electron-phonon scattering on the statistics of current fluctuations. We find that if the electron-electron scattering length is much shorter than the transport mean free path the higher cumulants of current are parametrically enhanced.

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