Mesoscopic noise theory: Microscopics, or phenomenology?

Green, F.; Das, M. P.
March 2000
AIP Conference Proceedings;2000, Vol. 511 Issue 1, p422
Academic Journal
We argue, physically and formally, that existing diffusive models of noise yield inaccurate microscopic descriptions of nonequilibrium current fluctuations. The theoretical shortfall becomes pronounced in quantum-confined metallic systems, such as the two-dimensional electron gas. In such systems we propose a simple experimental test of mesoscopic validity for diffusive theory’s central claim: the smooth crossover between Johnson-Nyquist noise and shot noise. © 2000 American Institute of Physics.


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