Stable suspension and dispersion-induced transitions from repulsive casimir forces between fluid-separated eccentric cylinders

Alejandro W. Rodriguez, J. N. Munday, J. D. Joannopoulos, Federico Capasso, Diego A.R. Dalvit, Steven G. Johnson

Research output: Contribution to journalArticle

31 Scopus citations

Abstract

We numerically demonstrate a stable mechanical suspension of a silica cylinder within a metallic cylinder separated by ethanol, via a repulsive Casimir force between the silica and the metal. We investigate cylinders with both circular and square cross sections, and show that the latter exhibit a stable orientation as well as a stable position, via a method to compute Casimir torques for finite objects. Furthermore, the stable orientation of the square cylinder undergoes a 45° transition as the separation length scale is varied, which is explained as a consequence of material dispersion.

Original languageEnglish (US)
Article number190404
JournalPhysical review letters
Volume101
Issue number19
DOIs
StatePublished - Nov 7 2008

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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