S-wave Scattering Length from Effective Positronium-Positronium Interaction for Bose-Einstein Condensates

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dc.creatorOda, K.
dc.creatorMiyakawa, T.
dc.creatorYabu, H.
dc.creatorSuzuki, T.
dc.date1999-11-29
dc.date.accessioned2026-07-07T03:15:20Z
dc.date.available2026-07-07T03:15:20Z
dc.descriptionThe s-wave scattering length for the Positronium-Positronium interaction is estimated semi-phenomenologically with the long-range van der Waals force and the short-range repulsive potential that represents the hard core between two positronium. The obtained value of the scattering length is $a \sim 0.44{\rm nm}$, and its stability is also checked for different parametrizations. Using this value, the Gross-Pitaevskii equation can be fixed for the Positronium Bose-Einstein condensates (Ps BEC). The static properties of Ps BEC are studied from the solutions of that equation. The phase-transition temperature shift of the Ps BEC due to the Ps-Ps interaction is also evaluated with the mean-field approximation.
dc.description7 pages, 6 figures, submitted to Phys. Rev. A
dc.identifierhttps://arxiv.org/abs/cond-mat/9911456
dc.identifierhttp://arxiv.org/abs/cond-mat/9911456
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/29989
dc.subjectCondensed Matter
dc.titleS-wave Scattering Length from Effective Positronium-Positronium Interaction for Bose-Einstein Condensates
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