On the corrections beyond proximity force approximation (PFA)

Details On the corrections beyond proximity force approximation (PFA) On the corrections beyond proximity force approximation (PFA)

2011-10-24

arxiv.org/abs/1110.5100v2

Physics

High Energy Physics

High Energy Physics - Theory

9 pages. Some changes in the conclusion

Scientific paper

We recalculate the first analytic correction beyond PFA for a sphere in front of a plane for a scalar field and for the electromagnetic field. We use the method of Bordag and Nikolaev [J.Phys.A, {\bf 41} (2008) p.164002]. We confirm their result for Dirichlet boundary conditions whereas we find a different one for Robin, Neumann and conductor boundary conditions. The difference can be traced back to a sign error. As a result, the corrections depend on the Robin parameter. Agreement is found with a very recent method of derivative expansion.

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