Calculation of nonzero-temperature Casimir forces in the time domain

Kai Pan, Alexander P. McCauley, Alejandro W. Rodriguez, M. T.Homer Reid, Jacob K. White, Steven G. Johnson

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


We show how to compute Casimir forces at nonzero temperatures with time-domain electromagnetic simulations, for example, using a finite-difference time-domain (FDTD) method. Compared to our previous zero-temperature time-domain method, only a small modification is required, but we explain that some care is required to properly capture the zero-frequency contribution. We validate the method against analytical and numerical frequency-domain calculations, and show a surprising high-temperature disappearance of a nonmonotonic behavior previously demonstrated in a pistonlike geometry.

Original languageEnglish (US)
Article number040503
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number4
StatePublished - Apr 29 2011
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


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