nd - m at . m es - h al l ] 1 3 O ct 1 99 9 Mesoscopic Noise Theory : Microscopics , or Phenomenology ? ∗
نویسنده
چکیده
We argue, physically and formally, that existing diffusive models of noise do not yield a faithful microscopic description of nonequilibrum current fluctuations. The theoretical deficit becomes more evident in quantum-confined metallic systems, such as the two-dimensional electron gas. In such systems we propose a specific experimental test of mesoscopic validity for diffusive theory’s central claim: the smooth crossover between thermally induced and shot-noise fluctuations of the current.
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تاریخ انتشار 1999