Tuesday, July 30, 2013

1307.7535 (Yasuhiro Yamada et al.)

Universal departure from Johnson-Nyquist relation caused by limited

Yasuhiro Yamada, Masatoshi Imada
We show theoretically that limited resolutions cause a deviation from the Johnson-Nyquist relation. This is demonstrated by examining electronic transport of a resonant level model. We also find that the deviation is described by a universal single-parameter scaling: The deviation prominent at low temperatures or for low-conductance systems disappears exponentially at high temperatures/conductance through an intermediate algebraic decrease, which invalidates a naive account of the resolution effects. Our findings offer an explanation for experimental puzzles in Johnson noise thermometry.
View original: http://arxiv.org/abs/1307.7535

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