Tuesday, August 6, 2013

1308.0712 (F. Intravaia et al.)

Quantum friction and non-equilibrium fluctuation theorems    [PDF]

F. Intravaia, R. O. Behunin, D. A. R. Dalvit
We use general concepts of non-equilibrium statistical mechanics to compute the quantum frictional force on an atom in steady motion above a surface. We derive the frictional force using a non-equilibrium fluctuation-dissipation relation, and compare with that computed with the quantum regression theorem. We show that beyond the weak coupling limit, quantum regression fails to predict the correct stationary atom-surface interaction as given by fluctuation-dissipation, both in and out of equilibrium, mainly due to the broadband nature of fluctuation-induced interactions.
View original: http://arxiv.org/abs/1308.0712

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