Mechanocaloric and Thermomechanical Effects in Bose-Einstein Condensed Systems

Details Mechanocaloric and Thermomechanical Effects in Bose-Einstein Condensed Systems Mechanocaloric and Thermomechanical Effects in Bose-Einstein Condensed Systems

2005-08-22

arxiv.org/abs/cond-mat/0508505v1

Physical Review A, 69 (5): Art. No. 053808 (May 2004)

Physics

Condensed Matter

Statistical Mechanics

19 pages, RevTex 4

Scientific paper

10.1103/PhysRevA.69.053808

In this paper we extend previous hydrodynamic equations, governing the motion of Bose-Einstein-condensed fluids, to include temperature effects. This allows us to analyze some differences between a normal fluid and a Bose-Einstein-condensed one. We show that, in close analogy with superfluid He-4, a Bose-Einstein-condensed fluid exhibits the mechanocaloric and thermomechanical effects. In our approach we can explain both effects without using the hypothesis that the Bose-Einstein-condensed fluid has zero entropy. Such ideas could be investigated in existing experiments.

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