Casimir interaction from magnetically coupled eddy currents

Details Casimir interaction from magnetically coupled eddy currents Casimir interaction from magnetically coupled eddy currents

2009-03-27

arxiv.org/abs/0903.4771v2

Phys.Rev.Lett.103:130405,2009

Physics

Quantum Physics

6 pages, 4 figures. This version: Fig.1 improved. Accepted for publication in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.103.130405

We study the quantum and thermal fluctuations of eddy (Foucault) currents in thick metallic plates. A Casimir interaction between two plates arises from the coupling via quasi-static magnetic fields. As a function of distance, the relevant eddy current modes cross over from a quantum to a thermal regime. These modes alone reproduce previously discussed thermal anomalies of the electromagnetic Casimir interaction between good conductors. In particular, they provide a physical picture for the Casimir entropy whose nonzero value at zero temperature arises from a correlated, glassy state.

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