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

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.

9 pages, 5 figures, corrected a missing factor of two in one equation, to be published in Physical Review A

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Cited by in corpus (13)

• Pinning of Hidden Vortices in Bose-Einstein Condensate
• Numerical method for evolving the dipolar projected Gross-Pitaevskii equation
• Dynamics in asymmetric double-well condensates
• Self trapping of a dipolar Bose-Einstein condensate in a double well
• Effects of quantum fluctuations on macroscopic quantum tunneling and self-trapping of BEC in a double well trap
• Blocked populations in ring-shaped optical lattices
• Two-mode dipolar bosonic junctions
• Hyperchaos in a Bose-Hubbard chain with Rydberg-dressed interactions
• Interaction-modulated tunneling dynamics in a mixture of Bose-Einstein condensates
• Anisotropic acoustics in dipolar Fermi gases
• Expansion of strongly interacting dipolar bosons in 1D optical lattices
• Quantum action of the Josephson dynamics
• On the different Floquet Hamiltonians in a periodic-driven Bose-Josephson junction