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arXiv · 0812.3193

Symmetry Breaking and Self-trapping of a Dipolar Bose-Einstein Condensate in a Double-well Potential

Bo Xiong·Jiangbin Gong·Han Pu·Weizhu Bao·Baowen Li
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Abstract

The quantum self-trapping phenomenon of a Bose-Einstein condensate (BEC) represents a remarkable nonlinear effect of wide interest. By considering a purely dipolar BEC in a double-well potential, we study how the dipole orientation affects the ground state structure and the transition between self-trapping and Josephson oscillation in dynamics. Three-dimensional numerical results and an effective two-mode model demonstrate that the onset of self-trapping of a dipolar BEC can be radically modified by the dipole orientation. We also analyze the failure of the two-mode model in predicting the rate of Josephson oscillations. We hope that our results can motivate experimental work as well as future studies of self-trapping of ultracold dipolar gases in optical lattices.

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Bo Xiong, Jiangbin Gong, Han Pu, Weizhu Bao, Baowen Li. 2009-01-15. Symmetry Breaking and Self-trapping of a Dipolar Bose-Einstein Condensate in a Double-well Potential. https://doi.org/10.1103/physreva.79.013626

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