Proposal to measure the Casimir Effect Across the Superconducting Transition

• URL: http://arxiv.org/abs/2502.04950v1
• Date: Fri, 07 Feb 2025 14:15:08 GMT
• Title: Proposal to measure the Casimir Effect Across the Superconducting Transition
• Authors: Giuseppe Bimonte,
• Abstract summary: We exploit the first-order superconducting transition induced in a thick film by a parallel magnetic field. By periodically modulating the magnetic field, we induce a corresponding modulation of the Casimir force. A successful measurement of this effect would provide crucial insights into the fundamental nature of the Casimir force.
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• Abstract: The influence of the superconducting transition on the Casimir effect remains experimentally elusive. We propose a novel approach to address this challenge, exploiting the first-order superconducting transition induced in a thick film by a parallel magnetic field. Our calculations for a Au sphere opposite a Pb film, based on the Mattis-Bardeen theory, predict a jump in the Casimir force across the transition. By periodically modulating the magnetic field, we induce a corresponding modulation of the Casimir force that should be readily detectable with existing micro-torsional oscillator technology, opening a promising pathway to finally observe the long-sought Casimir-superconductivity coupling. A successful measurement of this effect would provide crucial insights into the fundamental nature of the Casimir force and its interaction with macroscopic quantum phenomena.

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