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タイトル: | Effective light cone and digital quantum simulation of interacting bosons |
著者: | Kuwahara, Tomotaka Vu, Tan Van https://orcid.org/0000-0001-8184-9433 (unconfirmed) Saito, Keiji |
著者名の別形: | 齊藤, 圭司 |
発行日: | 21-Mar-2024 |
出版者: | Springer Nature |
誌名: | Nature Communications |
巻: | 15 |
号: | 1 |
論文番号: | 2520 |
抄録: | The speed limit of information propagation is one of the most fundamental features in non-equilibrium physics. The region of information propagation by finite-time dynamics is approximately restricted inside the effective light cone that is formulated by the Lieb-Robinson bound. To date, extensive studies have been conducted to identify the shape of effective light cones in most experimentally relevant many-body systems. However, the Lieb-Robinson bound in the interacting boson systems, one of the most ubiquitous quantum systems in nature, has remained a critical open problem for a long time. This study reveals a tight effective light cone to limit the information propagation in interacting bosons, where the shape of the effective light cone depends on the spatial dimension. To achieve it, we prove that the speed for bosons to clump together is finite, which in turn leads to the error guarantee of the boson number truncation at each site. Furthermore, we applied the method to provide a provably efficient algorithm for simulating the interacting boson systems. The results of this study settle the notoriously challenging problem and provide the foundation for elucidating the complexity of many-body boson systems. |
記述: | 量子もつれの伝達速度限界を解明 --ボーズ粒子系における新たな理論的発見と量子計算への応用--. 京都大学プレスリリース. 2024-03-29. |
著作権等: | © The Author(s) 2024 This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. |
URI: | http://hdl.handle.net/2433/287581 |
DOI(出版社版): | 10.1038/s41467-024-46501-7 |
出現コレクション: | 学術雑誌掲載論文等 |
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