通过 Rényi-1 相对应器有效检测强到弱自发对称性破坏
1University of California, Department of Physics, Berkeley, California 94720, USA.
Physical review letters
|May 2, 2025
概括
研究人员介绍了Rényi-1相关因子,这是一种用于检测量子混合状态中的强到弱自发对称性破坏 (SWSSB) 的新可观测量. 这种方法使得可扩展的实验检测使用标准的两点相关函数在纯化的状态.
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
- 量子计算是一种量子计算.
背景情况:
- 在量子混合状态 (SWSSB) 中自发的对称性破坏是新型量子相的一个关键特征.
- 现有的SWSSB诊断通常很难在量子设备上进行实验性探测.
- 实验验证需要一种可扩展的方法来检测混合状态的SWSSB.
研究的目的:
- 提出一种新的,实验上可访问的可观测物,用于检测量子混合状态中的SWSSB.
- 为了在混合状态下的SWSSB和在纯化状态下的普通自发对称性破坏之间建立联系.
- 为量子硬件上识别SWSSB阶段提供可扩展的路线.
主要方法:
- 介绍Rényi-1相关因子作为SWSSB的新型可观测物.
- 使用混合状态的正典净化 (CP).
- 在CP状态内分析普通的两点相关函数.
主要成果:
- 在混合状态下的SWSSB可以通过测量其正规净化中的相关函数来检测.
- 雷尼-1相关因子提供了SWSSB在混合状态和CP状态中的对称性破坏之间的直接联系.
- 演示可有效准备的CP状态,显示SWSSB,适合量子设备.
结论:
- 雷尼-1相关因子为实验检测SWSSB相提供了一个可扩展和实用的方法.
- 这个可观测值简化了量子混合状态相的表征.
- 该方法利用现有的量子计算能力来探测基本物理.
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