Electromagnetic Casimir energy of a disk opposite a plane
Name
PhysRevA.94.032509.pdf
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316.65 KB
Format
Adobe PDF
Checksum (MD5)
69c963901bab8076ba33ab0ba644584a
Author(s)
Emig, Thorsten
Graham, Noah
Date Issued
September 2016
Journal
Physical Review A
Publisher
American Physical Society
Citation
Emig, Thorsten, and Noah Graham. “Electromagnetic Casimir Energy of a Disk Opposite a Plane.” Physical Review A 94.3 (2016): n. pag. © 2016 American Physical Society
Version
Final published version
Abstract
Building on work by J. Meixner [Z. Naturforschung 3a, 506 (1948)], we show how to compute the exact scattering amplitude (or T-matrix) for electromagnetic scattering from a perfectly conducting disk. This calculation is a rare example of a nondiagonal T-matrix that can nonetheless be obtained in a semianalytic form. We then use this result to compute the electromagnetic Casimir interaction energy for a disk opposite a plane, for arbitrary orientation angle of the disk, for separations greater than the disk radius. We find that the proximity force approximation (PFA) significantly overestimates the Casimir energy, in the case of both the ordinary PFA, which applies when the disk is parallel to the plane, and the “edge PFA”, which applies when the disk is perpendicular to the plane.
MIT Department
Massachusetts Institute of Technology. Department of Physics
MultiScale Materials Science for Energy and Environment, Joint MIT-CNRS Laboratory
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1103/PhysRevA.94.032509
