Casimir spring and compass: Stable levitation and alignment of compact objects

Details Casimir spring and compass: Stable levitation and alignment of compact objects Casimir spring and compass: Stable levitation and alignment of compact objects

2009-09-24

arxiv.org/abs/0909.4510v1

Phys. Rev. Lett. 104, 070405 (2010)

Physics

Condensed Matter

Statistical Mechanics

5 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.104.070405

We investigate a stable Casimir force configuration consisting of an object contained inside a spherical or spheroidal cavity filled with a dielectric medium. The spring constant for displacements from the center of the cavity and the dependence of the energy on the relative orientations of the inner object and the cavity walls are computed. We find that the stability of the force equilibrium can be predicted based on the sign of the force, but the torque cannot be.

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