Stationary states of Bose-Einstein condensed atoms rotating in an asymmetric ring potential

• URL: http://arxiv.org/abs/2107.09291v1
• Date: Tue, 20 Jul 2021 07:19:48 GMT
• Title: Stationary states of Bose-Einstein condensed atoms rotating in an asymmetric ring potential
• Authors: M. \"Ogren, Giannis Drougakis, Giorgos Vasilakis, Wolf von Klitzing, G. M. Kavoulakis
• Abstract summary: We consider a Bose-Einstein condensate, which is confined in a very tight toroidal/annular trap, in the presence of a potential. We investigate the stationary states of the condensate, when its density distribution co-rotates with the symmetry-breaking potential. As the strength of the potential increases, we have a gradual transition from vortex excitation to solid-body-like motion.
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• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We consider a Bose-Einstein condensate, which is confined in a very tight toroidal/annular trap, in the presence of a potential, which breaks the axial symmetry of the Hamiltonian. We investigate the stationary states of the condensate, when its density distribution co-rotates with the symmetry-breaking potential. As the strength of the potential increases, we have a gradual transition from vortex excitation to solid-body-like motion. Of particular importance are states where the system is static and yet it has a nonzero current/circulation, which is a realization of persistent currents/reflectionless potentials.

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