Order Parameter at the Boundary of a Trapped Bose Gas

Дата и время публикации : 1996-04-11T14:22:09Z

Авторы публикации и институты :
F. Dalfovo
L. Pitaevskii
S. Stringari

Ссылка на журнал-издание: Phys. Rev. A 54 (1996) 4213
Коментарии к cтатье: 11 pages, REVTEX, 4 figures (uuencoded-gzipped-tar file) also available at http://anubis.science.unitn.it/~dalfovo/papers/papers.html
Первичная категория: cond-mat

Все категории : cond-mat

Краткий обзор статьи: Through a suitable expansion of the Gross-Pitaevskii equation near the classical turning point, we obtain an explicit solution for the order parameter at the boundary of a trapped Bose gas interacting with repulsive forces. The kinetic energy of the system, in terms of the classical radius $R$ and of the harmonic oscillator length $a_{_{HO}}$, follows the law $E_{kin}/N propto R^{-2} [log (R/a_{_{HO}}) + hbox{const.}]$, approaching, for large $R$, the results obtained by solving numerically the Gross-Pitaevskii equation. The occurrence of a Josephson-type current in the presence of a double trap potential is finally discussed.

Category: Physics