Indications of Universal Excess Fluctuations in Nonequilibrium Systems

Details Indications of Universal Excess Fluctuations in Nonequilibrium Systems Indications of Universal Excess Fluctuations in Nonequilibrium Systems

2008-08-07

arxiv.org/abs/0808.0993v2

Physics

Condensed Matter

Statistical Mechanics

4 pages, 4 figures; title changed, major revision; to appear in J. Phys. Soc. Jpn

Scientific paper

The fluctuation in electric current in nonequilibrium steady states is investigated by molecular dynamics simulation of macroscopically uniform conductors. At low frequencies, appropriate decomposition of the spectral intensity of current into thermal and excess fluctuations provides a simple picture of excess fluctuations behaving as shot noise. This indicates that the fluctuation-dissipation relation may be violated in a universal manner by the appearance of shot noise for a wide range of systems with particle or momentum transport.

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