Fluctuation theorem in quantum heat conduction

Keiji, Saito ; Abhishek, Dhar (2007) Fluctuation theorem in quantum heat conduction Physical Review Letters, 99 (18). 180601 _1-180601 _4. ISSN 0031-9007

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Official URL: http://prl.aps.org/abstract/PRL/v99/i18/e180601

Related URL: http://dx.doi.org/10.1103/PhysRevLett.99.180601


We consider steady-state heat conduction across a quantum harmonic chain connected to reservoirs modeled by infinite collection of oscillators. The heat, Q, flowing across the oscillator in a time interval τ is a stochastic variable and we study the probability distribution function P(Q). We compute the exact generating function of Q at large τ and the large deviation function. The generating function has a symmetry satisfying the steady-state fluctuation theorem without any quantum corrections. The distribution P(Q) is non-Gaussian with clear exponential tails. The effect of finite τ and nonlinearity is considered in the classical limit through Langevin simulations. We also obtain the prediction of quantum heat current fluctuations at low temperatures in clean wires.

Item Type:Article
Source:Copyright of this article belongs to The American Physical Society.
ID Code:79676
Deposited On:28 Jan 2012 12:10
Last Modified:18 May 2016 21:57

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