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Conical intersections in laboratory coordinates with ultracold molecules.

Wallis, A. O. G. and Gardiner, S. A. and Hutson, J. M. (2009) 'Conical intersections in laboratory coordinates with ultracold molecules.', Physical review letters., 103 (8). 083201.


For two states of opposite parity that cross as a function of an external magnetic field, the addition of an electric field will break the symmetry and induce an avoided crossing. A suitable arrangement of fields may be used to create a conical intersection as a function of external spatial coordinates. We consider the effect of the resulting geometric phase for ultracold polar molecules. For a Bose-Einstein condensate in the mean-field approximation, the geometric phase effect induces stable states of persistent superfluid flow that are characterized by half-integer quantized angular momentum.

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Publisher statement:© 2009 by The American Physical Society. All rights reserved.
Record Created:09 Oct 2009 15:35
Last Modified:19 Oct 2010 10:56

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