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  • Title: Quantum instability of a Bose-Einstein condensate with attractive interaction.
    Author: Berman GP, Smerzi A, Bishop AR.
    Journal: Phys Rev Lett; 2002 Mar 25; 88(12):120402. PubMed ID: 11909432.
    Abstract:
    We study the quantum and the mean-field Gross-Pitaevskii (GP) dynamics of a Bose-Einstein condensate gas confined in a toroidal trap. According to GP, if the interatomic interaction is attractive, the rotational states of the system can be dynamically stable or unstable depending on the strength of the mean-field energy. The full quantum analysis, however, reveals that the condensate is always unstable. Quantum fluctuations are particularly important close to the GP stability borderline, even for systems with a relatively large number of condensate atoms.
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