互动量子系统的自发对称性破坏和在不平衡稳定状态中的定位
1Wilczek Quantum Center and Key Laboratory of Artificial Structures and Quantum Control, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.
Science bulletin
|August 11, 2023
概括
量子电路中的时间离散,与数值错误不同,导致独特的不平衡现象. 测量反与这种离散的时间演变相结合,揭示了新的量子动力学,包括自发的对称性破坏和新的定位机制.
科学领域:
- 量子物理学 量子物理学 是一种量子物理学.
- 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
背景情况:
- 物理系统进化通常是通过通过时空离散数量解决的微分方程来建模的.
- 数字离散通常会引入累积的错误,对模拟产生负面影响.
- 在量子电路中",进化时间"本质上是离散的 (电路深度),使离散成为物理可观测的,而不是人工制造.
研究的目的:
- 为了研究从测量反和时间分离中产生的新型量子动力学.
- 探索这种交互式量子力学的物理后果.
- 识别新的现象,如不平衡稳定状态和独特的局部化机制.
主要方法:
- 使用具有离散时间演变 (电路深度) 的量子电路.
- 在量子电路中实现测量反.
- 分析一个零维 (单量子比特) 系统的稳定状态.
- 检查一个一维的交互式量子系统进行本地化.
主要成果:
- 展示了一种由测量反和时间离散驱动的新型量子动力学.
- 在单量子比特系统中观察到一个不平衡稳定状态,随着自发的对称性破坏.
- 在一维交互量子系统中提出了一个新的局部化机制,与安德森局部化不同.
结论:
- 量子系统中的时间离散是一种物理效应,导致独特的不平衡现象.
- 测量反与离散时间演变相结合,可以创建新的量子动态和状态.
- 这个框架为探索量子现象和设计量子模拟提供了新的途径.
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