Origin of the repulsive Casimir force in giant polarization-interconversion materials

• URL: http://arxiv.org/abs/2210.17285v1
• Date: Mon, 31 Oct 2022 13:12:10 GMT
• Title: Origin of the repulsive Casimir force in giant polarization-interconversion materials
• Authors: Zhou Li and Chinmay Khandekar
• Abstract summary: We exploit Lifshitz theory to identify the requirements for repulsive Casimir forces in gyrotropic media. We show that the origin of repulsive force in media with strong gyrotropy such as Weyl semi-metals arises from the giant interconversion of polarization of vacuum fluctuations.
• Score: 7.8920110069452445
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Achieving strong repulsive Casimir forces through engineered coatings can pave the way for micro- and nano-electromechanical applications where adhesive forces currently cause reliability issues. Here, we exploit Lifshitz theory to identify the requirements for repulsive Casimir forces in gyrotropic media for two limiting cases (ultra-strong gyroelectric and non-gyroelectric). We show that the origin of repulsive force in media with strong gyrotropy such as Weyl semi-metals arises from the giant interconversion of polarization of vacuum fluctuations.

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