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Bogoliubov Quasiparticles Carried by Dark Solitonic Excitations in Nonuniform Bose-Einstein Condensates |
HONG Tao;WANG Yu-zhu;HUO Yun-sheng |
Joint Laboratory for Quantum Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800 |
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Cite this article: |
HONG Tao, WANG Yu-zhu, HUO Yun-sheng 1998 Chin. Phys. Lett. 15 550-552 |
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Abstract We consider the noncondensate part of the Bose gas in presence of dark solitons. We get a stationary equation of Bogoliubov quasiparticles and find that these Bogoliubov quasiparticles are confined by a dark soliton and carried to propagate with it. This model of the compound structure of the soliton and Bogoliubov quasiparticles provides more precise description of localized sound excitations in Bose-Einstein condensates.
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Keywords:
03.75.Fi
42.65.Tg
42.81.Dp
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Published: 01 August 1998
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PACS: |
03.75.Fi
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42.65.Tg
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(Optical solitons; nonlinear guided waves)
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42.81.Dp
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(Propagation, scattering, and losses; solitons)
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Abstract
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