Journal
JOURNAL OF PHYSICS-CONDENSED MATTER
Volume 27, Issue 21, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0953-8984/27/21/214020
Keywords
quantum friction; non-equilibrium; atom-surface interaction
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Funding
- German Research Council [BU 1803/3-1]
- Freiburg Institute for Advanced Studies
- European Union Marie Curie People program through the Career Integration [631571]
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The aim of this paper is to revisit the calculation of atom-surface quantum friction in the quantum field theory formulation put forward by Barton (2010 New J. Phys. 12 113045). We show that the power dissipated into field excitations and the associated friction force depend on how the atom is boosted from being initially at rest to a configuration in which it is moving at constant velocity (nu) parallel to the planar interface. In addition, we point out that there is a subtle cancellation between the one-photon and part of the two-photon dissipating power, resulting in a leading order contribution to the frictional power which goes as nu(4). These results are also confirmed by an alternative calculation of the average radiation force, which scales as nu(3).
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