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タイトル: | Energy redistribution and spatiotemporal evolution of correlations after a sudden quench of the Bose-Hubbard model |
著者: | Takasu, Yosuke https://orcid.org/0000-0001-7458-8933 (unconfirmed) Yagami, Tomoya Asaka, Hiroto Fukushima, Yoshiaki Nagao, Kazuma Goto, Shimpei Danshita, Ippei Takahashi, Yoshiro |
著者名の別形: | 高須洋介 八神, 智哉 浅賀, 洋人 福島, 由章 長尾一馬 後藤慎平 段下一平 高橋義朗 |
発行日: | 30-Sep-2020 |
出版者: | American Association for the Advancement of Science (AAAS) |
誌名: | Science Advances |
巻: | 6 |
号: | 40 |
論文番号: | eaba9255 |
抄録: | An optical lattice quantum simulator is an ideal experimental platform to investigate nonequilibrium dynamics of a quantum many-body system, which is, in general, hard to simulate with classical computers. Here, we use our quantum simulator of the Bose-Hubbard model to study dynamics far from equilibrium after a quantum quench. We successfully confirm the energy conservation law in the one- and three-dimensional systems and extract the propagation velocity of the single-particle correlation in the one- and two-dimensional systems. We corroborate the validity of our quantum simulator through quantitative comparisons between the experiments and the exact numerical calculations in one dimension. In the computationally hard cases of two or three dimensions, by using the quantum-simulation results as references, we examine the performance of a numerical method, namely, the truncated Wigner approximation, revealing its usefulness and limitation. This work constitutes an exemplary case for the usage of analog quantum simulators. |
記述: | 非局所相関の伝搬の観測とエネルギー保存則の検証に成功 --冷却原子を用いた量子多体ダイナミクスの量子シミュレーション--. 京都大学プレスリリース. 2020-10-09. |
著作権等: | © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). |
URI: | http://hdl.handle.net/2433/255484 |
DOI(出版社版): | 10.1126/sciadv.aba9255 |
PubMed ID: | 32998897 |
関連リンク: | https://www.kyoto-u.ac.jp/ja/research-news/2020-10-09-0 |
出現コレクション: | 学術雑誌掲載論文等 |
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