在杂的混合量子电路中纠结构和信息保护
Shuo Liu1, Ming-Rui Li1, Shi-Xin Zhang2
1Institute for Advanced Study, <a href="https://ror.org/03cve4549">Tsinghua University</a>, Beijing 100084, China.
Physical review letters
|July 1, 2024
概括
量子噪声在测量诱导的相位转换期间影响纠生成和信息保护. 纠尺度为q^{-1/3},而信息保护时间尺度因噪声类型而异,为量子计算提供了洞察力.
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:
- 在真实量子系统中,量子噪声是不可避免的.
- 了解它们对量子现象的影响对于技术应用至关重要.
- 测量诱导的纠阶段过渡对环境影响很敏感.
研究的目的:
- 从理论上分析时间不相关的和相关的量子噪声对纠生成的影响.
- 调查这些噪音如何影响稳定状态中的信息保护时间表.
- 为了更深入地了解测量诱导的相位转换中的噪声效应.
主要方法:
- 量子噪声效应的理论分析.
- 对纠和信息保护的缩放规律的推导.
- 使用稳定器形式主义的数值模拟.
主要成果:
- 纠生成遵循两种噪声类型的q^{-1/3}扩展,与Kardar-Parisi-Zhang波动相关.
- 信息保护时间表表表现为无关联噪声 (海登-普雷斯基尔协议) 的q^{-1/2}缩放和对相关的噪声 (卡达尔-帕里西-张波动) 的q^{-2/3}缩放.
结论:
- 量子噪声在测量诱导的相位转换中显著影响纠和信息保护.
- 该研究揭示了不同类型噪声的不同扩展行为,为量子错误纠正和计算提供了洞察力.
- 这项工作弥合了对量子系统中马科维安和非马科维安噪声效应的理解.
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