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Article Dans Une Revue Physical Review Letters Année : 1997

Critical Temperature of Bose-Einstein condensation of hard sphere gases

Franck Laloë
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Peter Grüter
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Résumé

We determine the critical temperature of hard-sphere Bosons in a cubic box by path-integral Monte Carlo simulations and finite-size scaling. We obtain an enhancement compared to the ideal gas at low densities in the form of a power law in density with exponent $1/3$. At high densities the result for liquid helium, namely a lower critical temperature than in the non-interacting case, is recovered. We give a microscopic explanation for the observed behavior.

Dates et versions

hal-00001410 , version 1 (03-04-2004)

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Franck Laloë, David M. Ceperley, Peter Grüter. Critical Temperature of Bose-Einstein condensation of hard sphere gases. Physical Review Letters, 1997, 79, pp.3549. ⟨hal-00001410⟩
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