Casimir repulsion between metallic objects in vacuum

Michael Levin, Alexander P. McCauley, Alejandro W. Rodriguez, M. T.Homer Reid, Steven G. Johnson

Research output: Contribution to journalArticlepeer-review

136 Scopus citations


We give an example of a geometry in which two metallic objects in vacuum experience a repulsive Casimir force. The geometry consists of an elongated metal particle centered above a metal plate with a hole. We prove that this geometry has a repulsive regime using a symmetry argument and confirm it with numerical calculations for both perfect and realistic metals. The system does not support stable levitation, as the particle is unstable to displacements away from the symmetry axis.

Original languageEnglish (US)
Article number090403
JournalPhysical review letters
Issue number9
StatePublished - Aug 26 2010
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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