The stability of Bose--Einstein condensates in a two-dimensional shallow trap |
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Authors: | Zhou Xiao-Yan Mu Ai-Xia and Xue Ju-Kui |
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Institution: | College of Physics and Electronics Engineering, Northwest Normal University, Lanzhou 730070, China |
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Abstract: | The stability of Bose--Einstein condensates (BECs) loaded into a
two-dimensional shallow harmonic potential well is studied. By using
the variational method, the ground state properties for interacting
BECs in the shallow trap are discussed. It is shown that the possible
stable bound state can exist. The depth of the shallow well plays an
important role in stabilizing the BECs. The stability of BECs in the
shallow trap with the periodic modulating of atom interaction by
using the Feshbach resonance is also discussed. The results show that
the collapse and diffusion of BECs in a shallow trap can be
controlled by the temporal modulation of the scattering length. |
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Keywords: | Bose--Einstein condensates shallow harmonic potential well stability |
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