Thursday, December 6, 2012

1212.1092 (Matteo Colangeli et al.)

Fluctuations in quantum one-dimensional thermostatted systems with
off-diagonal disorder

Matteo Colangeli, Lamberto Rondoni
We analyze a one dimensional quantum model with off-diagonal disorder, consisting of a sequence of potential energy barriers whose width is a random variable either uniformly or normally distributed. We investigate how the disorder and the energy distribution (due to a thermostat at room temperature) affect the resulting value of the transmission coefficient, and discuss the structure of the fluctuations of such coefficient at different length scales and the onset of different size-dependent regimes. Our analysis suggests an efficient way to detect tunneling resonances in a regime of off-diagonal disorder.
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