Tangential and quantum frictional forces on a neutral particle moving near a surface

Details Tangential and quantum frictional forces on a neutral particle moving near a surface Tangential and quantum frictional forces on a neutral particle moving near a surface

2011-01-28

arxiv.org/abs/1101.5535v2

J. Comp. Theor. Nanoscience 9(2012)1-5

Physics

Condensed Matter

Other Condensed Matter

12 pages,4 figures, corrected typos and reference list

Scientific paper

10.1166/jtcn.2012.2005

We calculate tangential forces applied to a ground state atom (nanoparticle) moving with nonrelativistic velocity parallel to the surface of Drude -modelled or Lorentz -modelled half -space using the formalism of fluctuation electrodynamics.The obtained formulae assume the nonretarded regime and arbitrary temperatures of the particle and medium. The quantum frictional force is realized at zero temperature of the particle and medium and can reach about 1/3 of the static value of the Casimir -Polder force in the case of ground state atom. In the case of nanoparticles and nonzero temperature, the tangential forces appears to be both frictional and accelerating. Numerical examples are given for atoms of Na above the surface of Au and MgO nanoparticles above the surface of SiC.

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