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The Journal of Chemical Physics

Bound and Efimov states for 4He2 and 4He3 and Bose–Einstein condensation

Norman Henry March

Published Jul 1, 1983• 12 citations
Publisher

Abstract

The existence of a Bose–Einstein condensate at absolute zero is disputed. Superfluidity without a condensate is implied. Bound state of helium dimers and trimers are discussed. (AIP)
DOI
10.1063/1.445510

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Abstract We have shown that a simple model based on pairwise deltafunction potentials can, with an appropriate choice of parameters, represent the general behavior of ultra‐low temperature helium dimers and trimers, including all possible isotopomers. The species 4He2, 4He3, and 4He23He are stable, with binding energies of approximately 1.3, 100, and 10 mK, respectively. An Efimov state for 4He23He is also predicted, bound by 2.4 mK. The remaining dimers and trimers, 4He 3He, 3He2, 4He 3He2, and 3He3, are evidently unstable. © 2001 John Wiley & Sons, Inc. Int J Quantum Chem, 2001