Physics – Quantum Physics
Scientific paper
2008-07-25
Physics
Quantum Physics
Published in Physical Review Letters. Vol. 101, page, 190404 (2008)
Scientific paper
10.1103/PhysRevLett.101.190404
Using an exact numerical method for finite nonplanar objects, we 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 is shown to undergo an unusual 45 degrees transition as a function of the separation lengthscale, which is explained as a consequence of material dispersion.
Capasso Federico
Dalvit Diego A. R.
Joannopoulos John D.
Johnson Steven G.
Munday Jeremy N.
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