Nonequilibrium Casimir–Polder force in non-stationary systems
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Publication:5852386
DOI10.1088/1751-8113/43/1/012001zbMATH Open1180.81124arXiv0907.3212OpenAlexW3125535595MaRDI QIDQ5852386
Author name not available (Why is that?)
Publication date: 27 January 2010
Published in: (Search for Journal in Brave)
Abstract: Recently the Casmir-Polder force felt by an atom near a substrate under nonequilibrium stationary conditions has been studied theoretically with macroscopic quantum electrodyanamics (MQED) and verified experimentally with cold atoms. We give a quantum field theory derivation of the Langevin equation describing the atom's motion based on the influence functional method valid for fully nonequilibrium (nonstationary) conditions. The noise associated with the quantum field derived from first principles is generally colored and nonlocal, which is at variance with the `local source hypothesis' of MQED's generalization to nonequilibrium conditions. Precision measurements on the shape deformation of an atomic gas as a function of its distance from a mirror would provide a direct check of our predictions based on this Langevin equation.
Full work available at URL: https://arxiv.org/abs/0907.3212
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