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SU(3) spin-orbit-coupled Bose-Einstein condensate confined in a harmonic plus quartic trap |
| Hao Li(李昊)1, Fanglin Chen(陈方林)2 |
1 School of Mechanical and Electrical Engineering and Information Engineering, University of Mining and Technology, Beijing 100083, China;
2 College of Physics and Electronic Engineering, Chongqing Normal University, Chongqing 401331, China |
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Abstract We consider a SU(3) spin-orbit coupled Bose-Einstein condensate confined in a harmonic plus quartic trap. The ground-state wave functions of such a system are obtained by minimizing the Gross-Pitaevskii energy functional, and the effects of the spin-dependent interaction and spin-orbit coupling are investigated in detail. For the case of ferromagnetic spin interaction, the SU(3) spin-orbit coupling induces a threefold-degenerate plane wave ground state with nontrivial spin texture. For the case of antiferromagnetic spin interaction, the system shows phase separation for weak SU(3) spin-orbit coupling, where three discrete minima with unequal weights in momentum space are selected, while hexagonal honeycomb lattice structure for strong SU(3) SOC, where three discrete minima with equal weights are selected.
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Received: 13 June 2019
Accepted manuscript online:
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PACS:
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03.75.Mn
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(Multicomponent condensates; spinor condensates)
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05.45.Yv
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(Solitons)
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05.30.Jp
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(Boson systems)
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05.30.Rt
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(Quantum phase transitions)
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Corresponding Authors:
Fanglin Chen
E-mail: fanglin-4444@163.com
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Cite this article:
Hao Li(李昊), Fanglin Chen(陈方林) SU(3) spin-orbit-coupled Bose-Einstein condensate confined in a harmonic plus quartic trap 2019 Chin. Phys. B 28 070302
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| [42] |
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| [47] |
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| [48] |
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Arfken G B, Weber H J and Harris F E 2000 Mathematical Methods for Physicists (Elsevier: Academic Press)
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Press W H, Teukolsky S A, Vetterling W T and Flannery B P 1992 Numerical Recipes in Fortran 77 (Cambridge: Cambridge University Press)
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| [51] |
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