Universal Casimir interactions in the sphere-sphere geometry
- URL: http://arxiv.org/abs/2205.10812v1
- Date: Sun, 22 May 2022 13:04:24 GMT
- Title: Universal Casimir interactions in the sphere-sphere geometry
- Authors: Tanja Schoger, Benjamin Spreng, Gert-Ludwig Ingold, Astrid Lambrecht,
Paulo A. Maia Neto, Serge Reynaud
- Abstract summary: We study universal Casimir interactions in two configurations which appear as dual to each other.
The long-distance limit, equivalently the high-temperature limit, is dominated by the effect of low-frequency transverse magnetic thermal fluctuations.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: We study universal Casimir interactions in two configurations which appear as
dual to each other. The first involves spheres described by the Drude model and
separated by vacuum while the second involves dielectric spheres immersed in a
salted solution at distances larger than the Debye screening length. In both
cases, the long-distance limit, equivalently the high-temperature limit, is
dominated by the effect of low-frequency transverse magnetic thermal
fluctuations. They are independent of the details of dielectric functions of
materials, due to the finite conductivity of metals in the former case and of
salted water in the latter one. They also show universality properties in their
dependence on geometric dimensions, in relation to an approximate conformal
invariance of the reduced free energy.
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