Rodriguez, Alejandro W.Munday, J. N.Joannopoulos, J. D.Capasso, FedericoDalvit, Diego A. R.Johnson, Steven G.2019-09-172008Rodriguez, Alejandro W., J. N. Munday, J. D. Joannopoulos, Federico Capasso, Diego A. R. Dalvit, and Steven G. Johnson. 2008. “Stable Suspension and Dispersion-Induced Transitions from Repulsive Casimir Forces Between Fluid-Separated Eccentric Cylinders.” Physical Review Letters 101 (19). https://doi.org/10.1103/physrevlett.101.190404.0031-90071079-71141092-0145http://nrs.harvard.edu/urn-3:HUL.InstRepos:41371468We 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 degrees transition as the separation length scale is varied, which is explained as a consequence of material dispersion.en-USJournal Article2019-09-1710.1103/PhysRevLett.101.190404