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Rotating ground states of trapped Bose atoms with arbitrary two-body interactions

O. K. Vorov·M. S. Hussein·P. Van Isacker
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Abstract

In a k-dimensional system of weakly interacting Bose atoms trapped by a spherically symmetric and harmonic external potential, an exact expression is obtained for the rotating ground states at a fixed angular momentum. The result is valid for arbitrary interactions obeying minimal physical requirements. Depending on the sign of a modified scattering length, it reduces to either a collective rotation or a condensed vortex state, with no alternative. The ground state can undergo a kind of quantum phase transition when the shape of the interaction potential is smoothly varied.

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O. K. Vorov, M. S. Hussein, P. Van Isacker. 2002-09-13. Rotating ground states of trapped Bose atoms with arbitrary two-body interactions. https://doi.org/10.1103/physrevlett.90.200402

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