Nonmonotonic thermal Casimir force from geometry-temperature interplay

• Verfasst von: Weber, Alexej [VerfasserIn]
• Verfasst von: Gies, Holger [VerfasserIn]
• Titel: Nonmonotonic thermal Casimir force from geometry-temperature interplay
• Verf.angabe: Alexej Weber and Holger Gies
• E-Jahr: 2010
• Jahr: 23 July 2010
• Umfang: 4 S.
• Illustrationen: Diagramme
• Fussnoten: Gesehen am 11.10.2023
• Titel Quelle: Enthalten in: Physical review letters
• Ort Quelle: College Park, Md. : APS, 1958
• Jahr Quelle: 2010
• Band/Heft Quelle: 105(2010), 4, Artikel-ID 040403, Seite 1-4
• ISSN Quelle: 1079-7114
• DOI: doi:10.1103/PhysRevLett.105.040403
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1861522460

Abstract

The geometry dependence of Casimir forces is significantly more pronounced in the presence of thermal fluctuations due to a generic geometry-temperature interplay. We show that the thermal force for standard sphere-plate or cylinder-plate geometries develops a nonmonotonic behavior already in the simple case of a fluctuating Dirichlet scalar. In particular, the attractive thermal force can increase for increasing distances below a critical temperature. This anomalous behavior is triggered by a reweighting of relevant fluctuations on the scale of the thermal wavelength. The essence of the phenomenon becomes transparent within the worldline picture of the Casimir effect.