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Open Quantum Systems Decoherence

Casimir Self-Entropy of a Spherical Electromagnetic δ-Function Shell

arXiv

Authors: K. A. Milton, Pushpa Kalauni, Prachi Parashar, Yang Li

Year

2017

Paper ID

44300

Status

Preprint

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~2 min

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Abstract

In this paper we continue our program of computing Casimir self-entropies of idealized electrical bodies. Here we consider an electromagnetic δ-function sphere ("semitransparent sphere") whose electric susceptibility has a transverse polarization with arbitrary strength. Dispersion is incorporated by a plasma-like model. In the strong coupling limit, a perfectly conducting spherical shell is realized. We compute the entropy for both low and high temperatures. The TE self-entropy is negative as expected, but the TM self-entropy requires ultraviolet and infrared subtractions, and, surprisingly, is only positive for sufficiently strong coupling. Results are robust under different regularization schemes.

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In this paper we continue our program of computing Casimir self-entropies of idealized electrical bodies.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1707.09840 [2] arXiv https://arxiv.org/abs/1707.09840 [3] Publisher https://arxiv.org/abs/1707.09840

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