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Optical approach for the thermal partition function of photons
Phys. Rev. D 55, 3552 – Published 15 March, 1997
DOI: https://doi.org/10.1103/PhysRevD.55.3552
Abstract
The optical manifold method to compute the one-loop effective action in a static space-time is extended from the massless scalar field to the Maxwell field in any Feynman-like covariant gauge. The method is applied to the case of the Rindler space obtaining the same results as the point-splitting procedure. The result is free from Kabat’s surface terms which instead affect the -function or heat-kernel approaches working directly in the static manifold containing conical singularities. The relation between the optical method and the direct -function approach on the Euclidean Rindler manifold is discussed both in the scalar and the photon cases. Problems with the thermodynamic self-consistency of the results obtained from the stress tensor in the case of the Rindler space are pointed out.
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