Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2007-11-05
Phys.Rev.D77:045005,2008
Physics
High Energy Physics
High Energy Physics - Theory
5 pages, 4 eps figures; expanded discussion of previous work and additional references added, minor typos corrected
Scientific paper
10.1103/PhysRevD.77.045005
A multiple scattering formulation is used to calculate the force, arising from fluctuating scalar fields, between distinct bodies described by $\delta$-function potentials, so-called semitransparent bodies. (In the limit of strong coupling, a semitransparent boundary becomes a Dirichlet one.) We obtain expressions for the Casimir energies between disjoint parallel semitransparent cylinders and between disjoint semitransparent spheres. In the limit of weak coupling, we derive power series expansions for the energy, which can be exactly summed, so that explicit, very simple, closed-form expressions are obtained in both cases. The proximity force theorem holds when the objects are almost touching, but is subject to large corrections as the bodies are moved further apart.
Milton Kimball A.
Wagner Jef
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