Universality of Entanglement Transitions from Stroboscopic to Continuous Measurements.

Universality of Entanglement Transitions from Stroboscopic to Continuous Measurements.
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纠缠从频闪测量到连续测量转变的普遍性。

DOI:
10.1103/physrevlett.125.210602
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发表时间:
2020
影响因子:
8.6
通讯作者:
H. Schomerus
H. Schomerus
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
M. Szyniszewski;A. Romito;H. Schomerus

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测量驱动的纠缠熵的大规模和次大规模标度之间的转变引起了人们的兴趣,因为它们阐明了开放相互作用量子系统中热化和控制的复杂物理。虽然这种转变对于随机量子电路中的频闪测量是很好的建立的,但与物理环境的一个关键联系是它扩展到连续观察,其中对于一个可积模型,已经证明这种转变改变了它的性质,并成为即时的。在这里,我们证明了如果连续测量的系统是随机不可积的,那么有限耦合下的纠缠相变是持续的,并且证明了它与频闪模型中的相变是光滑地相连的。这在广泛的实验环境和为后一种系统积累的丰富知识之间提供了一座桥梁。
Measurement-driven transitions between extensive and subextensive scaling of the entanglement entropy receive interest as they illuminate the intricate physics of thermalization and control in open interacting quantum systems. While this transition is well established for stroboscopic measurements in random quantum circuits, a crucial link to physical settings is its extension to continuous observations, where for an integrable model it has been shown that the transition changes its nature and becomes immediate. Here, we demonstrate that the entanglement transition at finite coupling persists if the continuously measured system is randomly nonintegrable, and show that it is smoothly connected to the transition in the stroboscopic models. This provides a bridge between a wide range of experimental settings and the wealth of knowledge accumulated for the latter systems.
随机量子电路中测量引起的跃迁的关键特性
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