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Boson-boson mixtures and triplet correlations

descriptionPublicationkeyboard_double_arrow_right Article 01 Aug 1984 Spain Publisher:American Physical Society (APS)Journal:Physical Review B, volume 30, pages 1,200-1,204 (issn: 0163-1829,

Authors: Fabrocini, A.; Polls Martí, Artur;

doi: 10.1103/physrevb.30.1200

handle: 2445/9735

Boson-boson mixtures and triplet correlations

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Abstract

The hypernetted-chain formalism for boson-boson mixtures described by an extended Jastrow correlated wave function is derived, taking into account elementary diagrams and triplet correlations. The energy of an ideal boson 3He-4He mixture is computed for low values of the 3He concentration. The zero-3He-concentration limit provides a 3He chemical potential in good agreement with the experimental value, when a McMillan two-body correlation factor and the Lennard-Jones potential are adopted. If the Euler equations for the two-body correlation factors are solved in presence of triplet correlations, the agreement is again improved. At the experimental 4He equilibrium density, the 3He chemical potential turns out to be -2.58 K, to be compared with the experimental value, -2.79 K.

Country

Spain

Related Organizations

University of Barcelona
Spain
National Institute for Nuclear Physics
Italy

Keywords

Estadística quàntica, Statistique quantique, Condensed matter, Matèria condensada, Bosons

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