Electromagnetic Casimir densities for a wedge with a coaxial cylindrical shell |
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Authors: | AA Saharian |
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Institution: | (1) Department of Physics, Yerevan State University, 1 Alex Manoogian Street, 375025 Yerevan, Armenia |
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Abstract: | Vacuum expectation values of the field square and the energy-momentum tensor for the electromagnetic field are investigated
for the geometry of a wedge with a coaxial cylindrical boundary. All boundaries are assumed to be perfectly conducting, and
both regions inside and outside the shell are considered. By using the generalized Abel–Plana formula, the vacuum expectation
values are presented in the form of the sum of two terms. The first one corresponds to the geometry of the wedge without the
cylindrical shell, and the second term is induced by the presence of the shell. The vacuum energy density induced by the shell
is negative for the interior region and positive for the exterior region. The asymptotic behavior of the vacuum expectation
values are investigated in various limiting cases. It is shown that the vacuum forces acting on the wedge sides due to the
presence of the cylindrical boundary are always attractive.
PACS 03.70.+k |
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Keywords: | |
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