量子旋转器用于全面计数统计数据的可靠测量.
Rhine Samajdar1,2, Ewan McCulloch3,4, Vedika Khemani5
1Department of Physics, <a href="https://ror.org/00hx57361">Princeton University</a>, Princeton, New Jersey 08544, USA.
Physical review letters
|January 3, 2025
概括
我们开发了一种可扩展的旋转协议,用于测量量子系统中的全计数统计 (FCS). 这种方法准确地从各种初始状态和噪音动态捕获FCS,使稳定的张量网络模拟成为可能.
科学领域:
- 量子物理学的量子物理学
- 凝聚物质理论 凝聚物质理论
- 量子信息科学是一种量子信息科学.
背景情况:
- 完整计数统计 (FCS) 对于理解量子传输现象至关重要.
- 像量子气体显微镜这样的现有方法在某些初始状态和噪音动态方面存在局限性.
- 准确的FCS测量对于描述量子系统和模拟它们的行为至关重要.
研究的目的:
- 为测量全计数统计 (FCS) 引入一种新的,可扩展的协议.
- 为了克服现有的FCS测量技术的局限性.
- 为了使用张量网络方法实现FCS的稳定数值计算.
主要方法:
- 一个可扩展的协议,利用一个辅助量子位作为一个"旋转"来跟踪时间集成的粒子流.
- 该协议从数量不确定的初始状态和在有噪音动态的情况下捕获FCS.
- 将FCS映射到一个可观测的单体中,以使用张量网络方法进行稳定的数值计算.
主要成果:
- 旋转协议忠实地捕获FCS,即使在具有挑战性的实验条件下.
- 演示了在Floquet海森伯格旋转链中转移磁化的FCS计算.
- 在随机电路中计算了电荷转移的FCS,展示了该方法的多功能性.
结论:
- 提出的旋转协议为测量完整计数统计数据提供了一个可扩展和强大的方法.
- 这种方法显著提高了研究量子运输和模拟复杂量子系统的能力.
- 该方法对实验和数值研究的适用性在量子科学中开辟了新的途径.
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