2009年2月
Absence of Anomalous Tunneling of Bogoliubov Excitations for Arbitrary Potential Barrier under the Critical Condensate Current
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
- ,
- 巻
- 78
- 号
- 2
- 開始ページ
- 023001
- 終了ページ
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1143/JPSJ.78.023001
- 出版者・発行元
- PHYSICAL SOC JAPAN
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.
- リンク情報
- ID情報
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- DOI : 10.1143/JPSJ.78.023001
- ISSN : 0031-9015
- ORCIDのPut Code : 33229121
- Web of Science ID : WOS:000263575100001