从噪声中保护测量诱导的相位过渡
Dongheng Qian1,2, Jing Wang1,2,3,4
1Fudan University, State Key Laboratory of Surface Physics and Department of Physics, Shanghai 200433, China.
Physical review letters
|February 6, 2025
概括
量子增强操作保护测量诱导的相位过渡 (MIPT) 免受噪声的影响. 这允许实验检测MIPT,即真正的纠相过渡,即使在杂的量子系统中.
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
- 统计力学 统计力学
背景情况:
- 测量诱导的相位转换 (MIPT) 产生于保护量子信息免受测量的混动态.
- 不相干噪声通常会扰乱体积定律阶段,阻碍当前量子设备上的MIPT观测.
- 量子增强操作为减轻噪声影响提供了一个潜在的解决方案.
研究的目的:
- 为了证明量子增强操作可以保护MIPT免受环境噪音的影响.
- 为了使MIPT在存在噪声的情况下进行实验检测.
- 为了使MIPT在噪音条件下成为真正的纠阶段过渡.
主要方法:
- 使用条件纠变的特征.
- 模拟系统与竞争的外部随机场,代表噪声和量子增强.
- 在移相噪声下对 (2+1) 维量子电路的数值模拟.
- 为实验实现提出一种估计噪声率的方法.
主要成果:
- 量子增强操作有效地保护MIPT免受脱凝噪声的影响.
- 在零净场条件下可以观察到MIPT,通过平衡噪声和量子增强来实现.
- 条件纠 Entropy 在这些条件下作为纠过渡的有效探针.
- 数字证据证实MIPT在一个杂的 (2+1) D量子电路中.
结论:
- 量子增强是保护像MIPT这样的量子现象在杂环境中的强大工具.
- 拟议的协议为实验观察MIPT提供了一个可行的途径.
- 这项工作突出了量子增强运算在推动量子信息处理和理解基本量子动态方面的潜力.
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