Temperature effect in the Casimir attraction of a thin metal film

Details Temperature effect in the Casimir attraction of a thin metal film Temperature effect in the Casimir attraction of a thin metal film

2000-02-24

arxiv.org/abs/cond-mat/0002368v1

Physics

Condensed Matter

LaTeX 2.09, 8 pages, no figures

Scientific paper

10.1088/0305-4470/33/28/101

The Casimir effect for conductors at arbitrary temperatures is theoretically studied. By using the analytical properties of the Green functions and applying the Abel-Plan formula to Lifshitz's equation, the Casimir force is presented as sum of a temperature dependent and vacuum contributions of the fluctuating electromagnetic field. The general results are applied to the system consisting of a bulk conductor and a thin metal film. It is shown that a characteristic frequency of the thermal fluctuations in this system is proportional to the square root of a thickness of the metal film. For the case of the sufficiently high temperatures when the thermal fluctuations play the main role in the Casimir interaction, this leads to the growth of the effective dielectric permittivity of the film and to a disappearance of the dependence of Casimir's force on the sample thickness.

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