Cascade Boltzmann - Langevin approach to higher-order current correlations in diffusive metal contacts

Details Cascade Boltzmann - Langevin approach to higher-order current correlations in diffusive metal contacts Cascade Boltzmann - Langevin approach to higher-order current correlations in diffusive metal contacts

2002-03-25

arxiv.org/abs/cond-mat/0203503v2

Phys. Rev. B 66, 075334 (2002)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 2 eps figures, typo corrected, minor changes

Scientific paper

10.1103/PhysRevB.66.075334

The Boltzmann - Langevin approach is extended to calculations of third and fourth cumulants of current in diffusive-metal contacts. These cumulants result from indirect correlations between current fluctuations, which may be considered as "noise of noise". The calculated third cumulant coincides exactly with its quantum-mechanical value. The fourth cumulant tends to its quantum-mechanical value $-e^3I/105$ at high voltages and to a positive value $2e^2T/3R$ at V=0 changing its sign at $eV \sim 20T$.

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