Repulsive Casimir force in Bose–Einstein Condensate. (6th April 2018)

• Record Type: Journal Article
• Authors: Faruk, Mir Mehedi; Biswas, Shovon
• Is Part Of: Journal of statistical mechanics. (2018:Apr.)
• Publication Date: 2018-04-06
• Subjects: 3 -- 5 -- 2; Statistical mechanics -- Periodicals; Mechanics -- Statistical methods -- Periodicals; 530.1305
• DOI: 10.1088/1742-5468/aab01b
• Languages: English
• ISSNs: 1742-5468

Abstract

Abstract: We study the Casimir effect for a three dimensional system of ideal free massive Bose gas in a slab geometry with Zaremba and anti-periodic boundary conditions. It is found that for these type of boundary conditions the resulting Casimir force is repulsive in nature, in contrast with usual periodic, Dirichlet or Neumann boundary condition where the Casimir force is attractive (Martin and Zagrebnov 2006 Europhys. Lett. 73 15). Casimir forces in these boundary conditions also maintain a power law decay function below condensation temperature and exponential decay function above the condensation temperature albeit with a positive sign, identifying the repulsive nature of the force.