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Casimir pressure at two loops and soft boundaries at finite temperature

Luiz C. de Albuquerque

  • Instituto de Física, Universidade de São Paulo, P.O. Box 66318, 05389-970 São Paulo, SP, Brazil

Phys. Rev. D 55, 7754 – Published 15 June, 1997

DOI: https://doi.org/10.1103/PhysRevD.55.7754

Abstract

The first order Casimir pressure is computed in the λφD4 theory. Some peculiar results in odd space-times dimensions are noticed. Namely, the first-order pressure is beset by a divergence, proportional to the inverse of the distance between the plates. Hence, Dirichlet boundary conditions render the λφ34 theory nonrenormalizable at two loops. In order to understand this peculiar feature of odd dimensions we generalize a recent proposal to “soften” the hard Dirichlet walls. However, in its simplest form it does not solve the renormalization problem found in D=3.

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