2015年12月
Entanglement pre-thermalization in a one-dimensional Bose gas
NATURE PHYSICS
- ,
- ,
- ,
- 巻
- 11
- 号
- 12
- 開始ページ
- 1050
- 終了ページ
- +
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1038/NPHYS3478
- 出版者・発行元
- NATURE PUBLISHING GROUP
An isolated quantum system often shows relaxation to a quasi-stationary state before reaching thermal equilibrium. Such a pre-thermalized state was observed in recent experiments in a one-dimensional Bose gas after it had been coherently split into two. Although the existence of local conserved quantities is usually considered to be the key ingredient of pre-thermalization, the question of whether non-local correlations between the subsystems can influence pre-thermalization of the entire system has remained unanswered. Here we study the dynamics of coherently split one-dimensional Bose gases and find that the initial entanglement combined with energy degeneracy due to parity and translation invariance strongly affects the long-term behaviour of the system. The mechanism of this entanglement prethermalization is quite general and not restricted to one-dimensional Bose gases. In view of recent experiments with a small and well-defined number of ultracold atoms, our predictions based on exact few-body calculations could be tested in experiments.
- リンク情報
- ID情報
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- DOI : 10.1038/NPHYS3478
- ISSN : 1745-2473
- eISSN : 1745-2481
- Web of Science ID : WOS:000365898400023