STABILITY OF BOSE CONDENSED ATOMIC LI-7

Citation
M. Houbiers et Htc. Stoof, STABILITY OF BOSE CONDENSED ATOMIC LI-7, Physical review. A, 54(6), 1996, pp. 5055-5066
Citations number
19
Categorie Soggetti
Physics
Journal title
ISSN journal
10502947
Volume
54
Issue
6
Year of publication
1996
Pages
5055 - 5066
Database
ISI
SICI code
1050-2947(1996)54:6<5055:SOBCAL>2.0.ZU;2-Q
Abstract
We study the stability of a Bose condensate of atomic Li-7 in a (harmo nic oscillator) magnetic trap at nonzero temperatures. In analogy to t he stability criterion for a neutron star, we conjecture that the gas becomes unstable if the free energy as a function of the central densi ty of the cloud has a local extremum which conserves the number of par ticles. Moreover, we show that the number of condensate particles at t he point of instability decreases with increasing temperature, and tha t for the temperature interval considered, the normal part of the gas is stable against density fluctuations at this point.