对于局部量子哈密尔顿人的平衡状态的认证算法
Hamza Fawzi1, Omar Fawzi2, Samuel O Scalet3
1Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Cambridge, United Kingdom.
Nature communications
|August 27, 2024
概括
本研究介绍了经过认证的算法,以准确预测在平衡状态下的量子系统属性. 这些方法提供了严格的边界,使得可观测的有限时间近似,克服了量子多体系统中以前的不可分辨性挑战.
科学领域:
- 量子多体物理学 量子多体物理学
- 计算量子物理 计算量子物理
- 理论计算机科学 理论计算机科学
背景情况:
- 在量子多体系统中预测平衡状态在计算上具有挑战性.
- 现有的方法在热力学极限的收方面扎,导致无法确定性.
- 有限尺寸的缩放通常缺乏可靠预测的认证边界.
研究的目的:
- 开发用于计算量子系统中可观测物预期值的认证算法.
- 为这些预期值提供严格的下限和上限.
- 为了证明在有限时间内近似可观测的可行性.
主要方法:
- 设计用于预期值计算的认证算法.
- 在零和正温度下对局部量子哈密尔顿的应用.
- 在二维网格上进行通勤哈密尔顿式的收分析.
主要成果:
- 算法对预期值提供了严格的界限.
- 在有限时间内证明了局部可观测的近似值,对比了不可分辨性结果.
- 在高温下证明了快速收,用于通勤的二维格子哈密尔顿.
结论:
- 开发的算法为量子多体问题的预测提供了一种经过认证的方法.
- 局部可观测值可以通过对特定系统的凸式优化高效地近似.
- 这项工作弥合了理论未决性和实际计算之间的差距.
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