论文标题
在受监视的自由费米链中的纠缠过渡 - 从扩展的批判性到区域法
Entanglement transition in a monitored free fermion chain -- from extended criticality to area law
论文作者
论文摘要
我们分析了经受连续监测的自由费米子的量子轨迹动力学。对于较弱的监测，我们确定了一个新型的覆盖纠缠生长的动力学状态，让人联想到具有紧急保形不变性的关键阶段。但是，对于强烈的监测，动力学有利于过渡到类似量子的Zeno样区域法律。接近临界点，我们观察到对数有限尺寸的校正，表明过渡基础的berezinskii-kosterlitz-无尽的机制。这揭示了一个非常规的纠缠转变，用于弱连续测量的基础，物理现实的模型。此外，我们证明了动力学中的测量方面对于是否发生相转换至关重要。
We analyze the quantum trajectory dynamics of free fermions subject to continuous monitoring. For weak monitoring, we identify a novel dynamical regime of subextensive entanglement growth, reminiscent of a critical phase with an emergent conformal invariance. For strong monitoring, however, the dynamics favors a transition into a quantum Zeno-like area-law regime. Close to the critical point, we observe logarithmic finite size corrections, indicating a Berezinskii-Kosterlitz-Thouless mechanism underlying the transition. This uncovers an unconventional entanglement transition in an elementary, physically realistic model for weak continuous measurements. In addition, we demonstrate that the measurement aspect in the dynamics is crucial for whether or not a phase transition takes place.
