The heat kernel coefficients for the dielectric cylinder

Details The heat kernel coefficients for the dielectric cylinder The heat kernel coefficients for the dielectric cylinder

2001-02-27

arxiv.org/abs/hep-th/0102193v1

Phys.Rev.D64:025019,2001

Physics

High Energy Physics

High Energy Physics - Theory

14 pages, 1 figure

Scientific paper

10.1103/PhysRevD.64.025019

We calculate the \hkks for the \elm field in the background of a dielectric cylinder with non equal speeds of light inside and outside. The coefficient $a_{2}$ whose vanishing makes the vacuum energy of a massless field unique, turns out to be zero in dilute order, i.e., in order $(\ep-1)^{2}$, and nonzero beyond. As a consequence, the vanishing of the vacuum energy in the presence of a dielectric cylinder found by Casimir-Polder summation must take place irrespectively of the methods by which it might be calculated.

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