Casimir Interaction from Magnetically Coupled Eddy Currents

Francesco Intravaia and Carsten Henkel
Phys. Rev. Lett. 103, 130405 – Published 24 September 2009
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Abstract

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 quasistatic 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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  • Received 30 March 2009

DOI:https://doi.org/10.1103/PhysRevLett.103.130405

©2009 American Physical Society

Authors & Affiliations

Francesco Intravaia and Carsten Henkel

  • Institut für Physik und Astronomie, Universität Potsdam, 14476 Potsdam, Germany

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Issue

Vol. 103, Iss. 13 — 25 September 2009

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