摘要
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）.
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）.
基金
supported by the National Natural Science Foundation of China(Grant Nos 10674070 and 10674113)
the Program for New Century Excellent Talents in University of China(NCET-06-0707)
the Foundation for the Author of National Excellent Doctoral Dissertation of China(Grant No 200726)
the Natural Science Foundation of Hunan Province of China(Grant No 006JJ50006)
the Program for Changjiang Scholars and Innovative Team in University of China(Grant No IRT0534)
