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Mode dynamics of Bose-Einstein condensates in a single-well potential |
| Yaojun Ying(应耀俊), Lizhen Sun(孙李真), and Haibin Li(李海彬)† |
| Department of Applied Physics, Zhejiang University of Technology, Hangzhou 310023, China |
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Abstract We investigate dynamics of Bose-Einstein condensates (BECs) in a single-well potential using the mode-coupling method. Symmetry is shown to play a key role in the coupling between modes. A proper mode-coupling theory of the dynamics of BECs in a single-well potential should include at least four modes. In this context, the ideal BEC system can be decomposed into two independent subsystems when the coupling is caused by external potential perturbation and is linear. The mode dynamics of non-ideal BECs with interaction shows rich behavior. The combination of nonlinear coupling and initial condition leads to the different regimes of mode dynamics, from regularity to non-regularity, which also indicates a change of the dependence of coupling on the symmetry of modes.
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Received: 27 February 2023
Revised: 16 May 2023
Accepted manuscript online: 16 June 2023
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PACS:
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03.75.Lm
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(Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations)
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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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67.85.De
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(Dynamic properties of condensates; excitations, and superfluid flow)
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Corresponding Authors:
Haibin Li
E-mail: hbli@zjut.edu.cn
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Cite this article:
Yaojun Ying(应耀俊), Lizhen Sun(孙李真), and Haibin Li(李海彬) Mode dynamics of Bose-Einstein condensates in a single-well potential 2023 Chin. Phys. B 32 100310
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