Absence of Anomalous Tunneling of Bogoliubov Excitations for Arbitrary Potential Barrier under the Critical Condensate Current(General)
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概要
- 論文の詳細を見る
We derive the exact solution of low energy limit of Bogoliubov equations for excitations of Bose-Einstein condensate in the presence of arbitrary potential barrier and maximum current of condensate. Using this solution, we give the explicit expression for the transmission coefficient against the potential barrier, which shows partial transmission in the low energy limit. The wavefunctions of excitations in the low energy limit do not coincide with that of the condensate. The absence of the perfect transmission in the critical current state originates from local enhancement of density fluctuations around the potential barrier.
- 社団法人日本物理学会の論文
- 2009-02-15
著者
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Takahashi Daisuke
Department of Materials Science and Technology, Niigata University
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KATO Yusuke
Department of Chemistry and Chemical Engineering, Niigata University
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Kato Yusuke
Department Of Basic Science University Of Tokyo
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Kato Yusuke
Department Of Applied Biological Chemistry Graduate School Of Agricultural And Life Sciences Univers
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Takahashi Daisuke
Department Of Applied Chemistry Faculty Of Science And Technology Keio University
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TAKAHASHI Daisuke
Department of Basic Science, University of Tokyo
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