Physics – Condensed Matter – Quantum Gases
Scientific paper
2011-03-14
Phys. Rev. A, 83, 063615 (2011)
Physics
Condensed Matter
Quantum Gases
15 pages, 1 figure, 1 table
Scientific paper
10.1103/PhysRevA.83.063615
We study harmonically trapped ultracold Bose gases with attractive interparticle interactions under external rotation in three spatial dimensions and determine the critical value of the attraction strength where the gas collapses as a function of the rotation frequency. To this end we examine the stationary state in the corotating frame with a many-body approach as well as within the Gross-Pitaevskii theory of systems in traps with different anisotropies. In contrast to recently reported results [N. A. Jamaludin, N. G. Parker, and A. M. Martin, Phys. Rev. A \textbf{77}, 051603(R) (2008)], we find that the collapse is not postponed in the presence of rotation. Unlike repulsive gases, the properties of the attractive system remain practically unchanged under rotation in isotropic and slightly anisotropic traps.
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