Worldline approach for numerical computation of electromagnetic Casimir energies. I. Scalar field coupled to magnetodielectric media

Abstract

We present a worldline method for the calculation of Casimir energies for scalar fields coupled to magnetodielectric media. The scalar model we consider may be applied in arbitrary geometries, and it corresponds exactly to one polarization of the electromagnetic field in planar layered media. Starting from the field theory for electromagnetism, we work with the two decoupled polarizations in planar media and develop worldline path integrals, which represent the two polarizations separately, for computing both Casimir and Casimir-Polder potentials. We then show analytically that the path integrals for the transverse-electric (TE) polarization coupled to a dielectric medium converge to the proper solutions in certain special cases, including the Casimir-Polder potential of an atom near a planar interface, and the Casimir energy due to two planar interfaces. We also evaluate the path integrals numerically via Monte-Carlo path-averaging for these cases, studying the convergence and performance of the resulting computational techniques. While these scalar methods are only exact in particular geometries, they may serve as an approximation for Casimir energies for the vector electromagnetic field in other geometries.

22 pages, 8 figures

References in corpus (11)

• Casimir forces between arbitrary compact objects
• The Casimir effect within scattering theory
• Worldline algorithms for Casimir configurations
• Casimir edge effects
• Casimir-Polder interaction between an atom and a cavity wall under the influence of real conditions
• Casimir energy between a plane and a sphere in electromagnetic vacuum
• Trapped Atoms in One-Dimensional Photonic Crystals
• Virtual photons in imaginary time: Computing exact Casimir forces via standard numerical-electromagnetism techniques
• Interplay between geometry and temperature for inclined Casimir plates
• Geothermal Casimir Phenomena
• Numerical methods for fluctuation driven interactions between dielectrics

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