论文标题
通过投影测量的双单位量子电路中的确切动力学
Exact dynamics in dual-unitary quantum circuits with projective measurements
论文作者
论文摘要
双重自动回路已成为混沌量子多体动力学的最小模型，其中相关性和纠缠的动力学仍然可以探讨。同时，对测量对多体系统中量子信息动态的影响引起了极大的兴趣。在这项工作中，我们介绍了一类模型，这些模型将双重统一电路与特定的投影测量结果相结合，以确切地计算局部可观察物，纠缠增长和稳态纠缠的动态相关性。我们确定了防止测量引起的相变的对称性，并为中间临界纯化阶段提供了精确的结果。
Dual-unitary circuits have emerged as a minimal model for chaotic quantum many-body dynamics in which the dynamics of correlations and entanglement remains tractable. Simultaneously, there has been intense interest in the effect of measurements on the dynamics of quantum information in many-body systems. In this work we introduce a class of models combining dual-unitary circuits with particular projective measurements that allow the exact computation of dynamical correlations of local observables, entanglement growth, and steady-state entanglement. We identify a symmetry preventing a measurement-induced phase transition and present exact results for the intermediate critical purification phase.
