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Article Dans Une Revue International Journal of Modern Physics A Année : 2022

Universal Casimir interactions in the sphere–sphere geometry

Résumé

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.

Dates et versions

hal-03676511 , version 1 (24-05-2022)

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Citer

Tanja Schoger, Benjamin Spreng, Gert-Ludwig Ingold, Astrid Lambrecht, Paulo A. Maia Neto, et al.. Universal Casimir interactions in the sphere–sphere geometry. International Journal of Modern Physics A, 2022, ⟨10.1142/S0217751X22410056⟩. ⟨hal-03676511⟩
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