Energy barriers for vortex nucleation in dipolar condensates |
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Authors: | M Abad M Guilleumas R Mayol M Pi D M Jezek |
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Institution: | 1. Departament d’Estructura i Constituents de la Matèria, Facultat de Física, and IN2UB, Universitat de Barcelona, E-08028, Barcelona, Spain 2. Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, RA-1428, Buenos Aires, Argentina 3. Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina
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Abstract: | We consider singly-quantized vortex states in a condensate of 52Cr atoms in a pancake trap. We obtain the vortex solutions by numerically solving the Gross-Pitaevskii equation in the rotating frame with no further approximations. The behavior of the condensate is studied under three different situations concerning the interactions: only s-wave, s-wave plus dipolar and only dipolar. The energy barrier for the nucleation of a vortex is calculated as a function of the vortex displacement from the rotation axis in the three cases. These results are compared to those obtained for contact interaction condensates in the Thomas-Fermi approximation, and to a pseudo-analytical model, showing this latter a very good agreement with the numerical calculation. |
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