On van der Waals friction. II: Between atom and half-space

Details On van der Waals friction. II: Between atom and half-space On van der Waals friction. II: Between atom and half-space

Nov 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010njph...12k3045b&link_type=abstract

New Journal of Physics, Volume 12, Issue 11, pp. 113045 (2010).

Physics

12

Scientific paper

We calculate the frictional resistance experienced by an atom, modelled as a harmonic oscillator, moving with constant velocity u at a fixed distance ζ outside and parallel to the surface of a Drude-modelled half-space. Our method applies in the nonrelativistic/nonretarded/electrostatic regime, where u is far below c, and u/ζ is far below any important natural frequency of the atom or of the material. For a dissipative (e.g. for an ohmic) half-space and for the low values of u least unlikely to be of practical interest, this force is dominated by a term proportional to u/ζ 8, found perturbatively to fourth order in the interaction between atom and half-space. It appears to depend rather sensitively on how line shapes are handled.

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