在通用量子处理器上测量中心电荷
Nazlı Uğur Köylüoğlu1,2,3,4, Swarnadeep Majumder5,6,7, Mirko Amico8
1IBM Quantum, IBM T.J. Watson Research Center, Yorktown Heights, NY, USA. nazliugurkoyluoglu@g.harvard.edu.
Nature communications
|January 8, 2026
概括
研究人员使用量子处理器实验确定了中心电荷,这是符合性场理论 (CFT) 的一个关键性质. 这一突破允许精确测量1+1D量子自旋链中的关键点.
科学领域:
- 量子信息科学 量子信息科学
- 凝聚物质物理学 凝聚物质物理学
- 高能物理 高能物理
背景情况:
- 中心电荷是合规场理论 (CFT) 中的一个基本量.
- 它决定了二维系统中关键点的普遍性类.
- 实验测量中心电荷一直是具有挑战性的.
研究的目的:
- 通过实验确定量子自旋链的中心电荷.
- 为了证明通用量子处理器对于基本物理测量的能力.
- 验证量子计算用于研究关键现象的使用.
主要方法:
- 使用了具有经典优化的变量量子电路的通用量子处理器.
- 采用先进的错误减轻技术来准备地面状态.
- 使用IBM量子处理器的重六边形结构实现周期性边界条件.
- 从雷尼热量概括的缩放行为中提取的中心电荷.
主要成果:
- 成功准备了1+1D量子自旋链模型在其关键点上的地面状态.
- 对横场Ising (TFI) 链 (c=0.5) 和XXZ链 (c=1) 的实验结果与理论值一致.
- 在确定中心电荷时,达到低至5%的相对误差.
结论:
- 量子自旋链的中心电荷可以通过实验确定,使用量子处理器.
- 这项工作建立了一种新的实验方法,用于探测CFT的基本特性.
- 量子计算为探索关键现象和凝聚物质系统提供了一个强大的工具.
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