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Functional derivation of Casimir energy at non-zero temperature

Avijit K. Ganguly, Palash B. Pal

hep-tharXiv:hep-th/9803009

Abstract

Performing functional integration of the free Lagrangian, we find the vacuum energy of a field. The functional integration is performed in a way which easily generalizes to systems at non-zero temperature. We use this technique to obtain the Casimir energy density and pressure at arbitrary temperatures.

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