Repulsive Casimir forces

Details Repulsive Casimir forces Repulsive Casimir forces

2002-02-20

arxiv.org/abs/quant-ph/0202114v1

Phys.Rev.Lett. 89 (2002) 033001

Physics

Quantum Physics

Scientific paper

10.1103/PhysRevLett.89.033001

We discuss repulsive Casimir forces between dielectric materials with non trivial magnetic susceptibility. It is shown that considerations based on naive pair-wise summation of Van der Waals and Casimir Polder forces may not only give an incorrect estimate of the magnitude of the total Casimir force, but even the wrong sign of the force when materials with high dielectric and magnetic response are involved. Indeed repulsive Casimir forces may be found in a large range of parameters, and we suggest that the effect may be realized in known materials. The phenomenon of repulsive Casimir forces may be of importance both for experimental study and for nanomachinery applications.

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