Maxwell eigenmode approach to the Casimir-Lifshitz torque

Wijnand Broer, John Yuh Han Liow, Bing Sui Lu

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


More than 40 years ago, Barash published a calculation of the full retarded Casimir-Lifshitz torque for planar birefringent media with arbitrary degrees of anisotropy. An independent theoretical confirmation has been lacking since. We report a systematic and transparent derivation of the torque between two media with both electric and magnetic birefringence. Our approach, based on an eigenmode decomposition of Maxwell's equations, generalizes Barash's result for electrically birefringent materials, and can be generalized to a wide range of anisotropic materials and finite thickness effects.

Original languageEnglish
Article number012514
JournalPhysical Review A
Issue number1
Publication statusPublished - 23 Jul 2019
Externally publishedYes


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