Comment on "The Casimir effect for the Bose-gas in slabs" by P. A. Martin and V. A. Zagrebnov. Relation between the thermodynamic Casimir effect in Bose-gas slabs and critical Casimir forcesA. Gambassi1, 2 and S. Dietrich1, 2
1 Max-Planck Institut für Metallforschung - Heisenbergstr. 3 D-70569 Stuttgart, Germany
2 Institut für Theoretische und Angewandte Physik, Universität Stuttgart Pfaffenwaldring 57, D-70569 Stuttgart, Germany
received 6 February 2006; accepted 21 March 2006
published online 7 April 2006
In a recent letter, Martin and Zagrebnov (Europhys. Lett., 73 (2006) 15) discussed the thermodynamic Casimir effect for the ideal Bose gas confined in a thin film. We point out that their findings can be expressed in terms of previous general results for the Casimir effect induced by confined critical fluctuations. This highlights the links between the Casimir effect in the contexts of critical phenomena and Bose-Einstein condensation.
05.30.-d - Quantum statistical mechanics.
05.30.Jp - Boson systems.
03.75.Hh - Static properties of condensates; thermodynamical, statistical, and structural properties.
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