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Dispersion forces in inhomogeneous planarly layered media: A one-dimensional model for effective polarizabilities

: Fiedler, J.; Spallek, F.; Thiyam, P.; Persson, C.; Boström, M.; Walter, M.; Buhmann, S.Y.

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Physical review. A 99 (2019), Nr.6, Art. 062512, 10 S.
ISSN: 2469-9926
ISSN: 2469-9934
Deutsche Forschungsgemeinschaft DFG
Zeitschriftenaufsatz, Elektronische Publikation
Fraunhofer IWM ()
casimir effect & related phenomena; geometrical & wave optics; light propagation, transmission & absorption; quantum fluctuations & noise; Van der Waals interaction

Dispersion forces such as van der Waals forces between two microscopic particles, the CasimirPolder forces between a particle and a macroscopic object or the Casimir force between two dielectric objects are well studied in vacuum. However, in realistic situations the interacting objects are often embedded in an environmental medium. Such a solvent influences the induced dipole interaction. With the framework of macroscopic quantum electrodynamics, these interactions are mediated via an exchange of virtual photons. Via this method the impact of a homogeneous solvent medium can be expressed as local-field corrections leading to excess polarisabilities which have previously been derived for hard boundary conditions. In order to develop a more realistic description, we investigate on a one-dimensional analog system illustrating the influence of a continuous dielectric profile.