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

Thumbnail Image

Date

Authors

Journal Title

Journal ISSN

Volume Title

Publisher

Abstract

Description

The 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.
7 pages, 6 figures, submitted to Phys. Rev. A

Keywords

Condensed Matter

Citation

URI

http://salesiana.dossiersoluciones.com/handle/123456789/29989

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/9911456
 http://arxiv.org/abs/cond-mat/9911456

Collections

arXiv