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Small Amplitude Solitons in Bose--Einstein Condensates with External Perturbation |
| WANG Feng-Jiao1;YAN Xiao-Hong2;WANG Deng-Long 1,2 |
| 1Department of Physics and Key Laboratory of Low Dimensional Materials and Application Technology of Ministry of Education, Xiangtan University, Xiangtan 4111052College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing 210016 |
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| Cite this article: |
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WANG Feng-Jiao, YAN Xiao-Hong, WANG Deng-Long 2008 Chin. Phys. Lett. 25 4-7 |
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Abstract By developing a small amplitude soliton approximation method, we study analytically weak nonlinear excitations in cigar-shaped condensates with repulsive interatomic interaction under consideration of external perturbation potential. It is shown that matter wave solitons may exist and travel over a
long distance without attenuation and change in shape by properly adjusting the strength of interatomic interaction to compensate for the effect of external perturbation potential.
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| Keywords:
02.30.Mv
03.75.Lm
02.75.Kk
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Received: 14 September 2007
Published: 27 December 2007
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| PACS: |
02.30.Mv
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(Approximations and expansions)
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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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02.75.Kk
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