Mechanocaloric and thermomechanical effects in Bose-Einstein-condensed systems

Journal Article · Sat May 01 00:00:00 EDT 2004 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.69.053808· OSTI ID:20643678

Marques, G C; Bagnato, V S; Muniz, S R; Spehler, D ^[1]

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1. Instituto de Fisica, Universidade de Sao Paulo, Caixa Postal 66318, 05389-970 Sao Paulo, SP (Brazil)

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 {sup 4}He, 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.

• OSTI ID: 20643678
• Journal Information: Physical Review. A, Vol. 69, Issue 5; Other Information: DOI: 10.1103/PhysRevA.69.053808; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
BOSE-EINSTEIN CONDENSATION
ENTROPY
FLUIDS
HELIUM 4
HYDRODYNAMICS
SUPERFLUIDITY
TEMPERATURE DEPENDENCE