Nonlocal microscopic theory of Casimir forces at finite temperature

Despoja, Vito and Šunjić, Marijan and Marušić, Leonardo (2011) Nonlocal microscopic theory of Casimir forces at finite temperature. Physical Review B, 83 (16). pp. 165421-13. ISSN 1098-0121

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The interaction energy between two metallic slabs in the retarded limit at finite temperature is expressed in terms of surface polariton propagators for separate slabs, avoiding the usual matching procedure, with both diamagnetic and paramagnetic excitations included correctly. This enables appropriate treatment of arbitrary electron density profiles and fully nonlocal electronic response, including both collective and single-particle excitations. The results are verified by performing the nonretarded and long-wavelength (local) limits and showing that they reduce to the previously obtained expressions. Possibilities for practical use of the theory are explored by applying it to calculation of various contributions to the Casimir energy between two silver slabs.

Item Type: Article
Keywords: Casimir energy, retarded interaction, surface polariton propagators, nonlocal theory, diamagnetic and paramagnetic excitations
Date: April 2011
Subjects: NATURAL SCIENCES > Physics
Additional Information: Copyright (2011) by the American Physical Society.
Divisions: Faculty of Science > Department of Physics
Project code: 119-1191458-1011
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 03 Jun 2014 11:59
Last Modified: 03 Jun 2014 11:59

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