论文标题
在竞争监控方案下的纠缠熵尺度过渡
Entanglement entropy scaling transition under competing monitoring protocols
论文作者
论文摘要
耗散通常会导致量子状态的破坏。相比之下,最近的许多提案表明,耗散也可以量身定制以稳定多体纠缠量子状态。尽管这些作品的重点主要是在工程上进行非平衡稳态,但我们调查了量子轨迹中纠缠的积累。具体而言,我们分析了两个不兼容的连续监测协议引起的两个不同耗散通道之间的竞争。第一个协议在注册量子跳跃时锁定了相邻站点的阶段,从而通过系统产生了远距离的纠缠,而第二个则通过Dephasing机制破坏了连贯性。通过研究与连续监测方案相关的随机量子轨迹的解开,我们提出了从临界缩放到区域法律行为的平均轨迹纠缠熵的缩放的过渡。我们的工作提供了关于测量引起的相变的替代观点:可以将测量视为监视和注册量子跳跃,从而通过量子量的量子量型量子范围进行了有趣的扩展。
Dissipation generally leads to the decoherence of a quantum state. In contrast, numerous recent proposals have illustrated that dissipation can also be tailored to stabilize many-body entangled quantum states. While the focus of these works has been primarily on engineering the non-equilibrium steady state, we investigate the build-up of entanglement in the quantum trajectories. Specifically, we analyze the competition between two different dissipation channels arising from two incompatible continuous monitoring protocols. The first protocol locks the phase of neighboring sites upon registering a quantum jump, thereby generating a long-range entanglement through the system, while the second destroys the coherence via a dephasing mechanism. By studying the unraveling of stochastic quantum trajectories associated with the continuous monitoring protocols, we present a transition for the scaling of the averaged trajectory entanglement entropies, from critical scaling to area-law behavior. Our work provides an alternative perspective on the measurement-induced phase transition: the measurement can be viewed as monitoring and registering quantum jumps, offering an intriguing extension of these phase transitions through the long-established realm of quantum optics.