Gain/loss effect on bright solitary wave in a cigar-shaped attractive condensate in the presence of expulsive parabolic potential |
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Authors: | Wang Feng-Jiao Ding Jian-Wen Yan Xiao-Hong and Wang Deng-Long |
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Institution: | College of Science, Nanjing University of Aeronautics and
Astronautics, Nanjing 210016, China; Department of Physics {& Institute for Nanophysics and Rare-earth Luminescence, Xiangtan University, Xiangtan 411105, China |
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Abstract: | Taking into account both gain/loss and time-dependent atomic
scattering length, this paper analytically derives an exact bright
solitary wave in a cigar-shaped attractive condensate in the
presence of an expulsive parabolic potential. Due to the balance of the
scattering length and gain/loss, the bright solitary wave is shown
to have constant amplitude. Especially, it is found that the bright
solitary wave is accelerated by expulsive force, whose velocity
can be modulated by changing the axial and transverse angular
frequencies. The results are in good agreement with the experimental
observations by Khaykovich et al (2002 Science 296
1290). |
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Keywords: | Bose--Einstein condensate bright solitary wave gain/loss |
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