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Anderson localization of a spin-orbit coupled Bose-Einstein condensate in disorder potential |
| Huan Zhang(张欢), Sheng Liu(刘胜), and Yongsheng Zhang(张永生)† |
| CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China |
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Abstract We present numerical results of a one-dimensional spin-orbit coupled Bose-Einstein condensate expanding in a speckle disorder potential by employing the Gross-Pitaevskii equation. Localization properties of a spin-orbit coupled Bose-Einstein condensate in zero-momentum phase, magnetic phase and stripe phase are studied. It is found that the localizing behavior in the zero-momentum phase is similar to the normal Bose-Einstein condensate. Moreover, in both magnetic phase and stripe phase, the localization length changes non-monotonically as the fitting interval increases. In magnetic phases, the Bose-Einstein condensate will experience spin relaxation in disorder potential.
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Received: 18 October 2021
Revised: 27 January 2022
Accepted manuscript online: 10 February 2022
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PACS:
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03.75.Kk
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(Dynamic properties of condensates; collective and hydrodynamic excitations, superfluid flow)
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73.20.Fz
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(Weak or Anderson localization)
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71.70.Ej
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(Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect)
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| Fund: Y. S. Zhang thanks Professor Chuanwei Zhang for drawing our attention to the topic of Anderson localization of BECs. This work was supported by the National Natural Science Foundation of China (Grant No. 92065113) and the National Key R&D Program. The calculation on GPU was performed on the supercomputing system in the Supercomputing Center of University of Science and Technology of China. |
Corresponding Authors:
Yongsheng Zhang
E-mail: yshzhang@ustc.edu.cn
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Cite this article:
Huan Zhang(张欢), Sheng Liu(刘胜), and Yongsheng Zhang(张永生) Anderson localization of a spin-orbit coupled Bose-Einstein condensate in disorder potential 2022 Chin. Phys. B 31 070305
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