Universal Casimir interactions in the sphere–sphere geometry

  • 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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Author:Tanja SchogerORCiD, Benjamin SprengORCiD, Gert-Ludwig IngoldORCiDGND, Astrid LambrechtORCiD, Paulo A. Maia NetoORCiD, Serge ReynaudORCiD
Frontdoor URLhttps://opus.bibliothek.uni-augsburg.de/opus4/98064
Parent Title (English):International Journal of Modern Physics A
Publisher:World Scientific
Place of publication:Singapore
Year of first Publication:2022
Release Date:2022/09/12
First Page:2241005
Institutes:Mathematisch-Naturwissenschaftlich-Technische Fakultät
Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik
Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik / Lehrstuhl für Theoretische Physik I
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik