Thermodynamics of Quantum Jump Trajectories

Thermodynamics of Quantum Jump Trajectories
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DOI:
10.1103/physrevlett.104.160601
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发表时间:
2010-04-23
影响因子:
8.6
通讯作者:
Lesanovsky, Igor
Lesanovsky, Igor
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
Garrahan, Juan P.;Lesanovsky, Igor

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我们用大偏差方法研究耗散量子系统的轨迹。我们表明,在长时间范围内,量子跳跃的统计可以从轨道空间中的动力学相和动力学相之间的跃迁的热力学论点来理解。我们用三个简单的例子来说明我们的方法:一个受驱动的二能级系统,其中我们在发射的光子的轨迹集合中找到一个特定的标度不变点;一个闪烁的三能级系统,其中我们认为光子计数中的间歇性与不同的动力学相之间的交叉有关;以及微脉塞,其中我们在轨迹集合中找到实际的一阶相变。
We apply the large-deviation method to study trajectories in dissipative quantum systems. We show that in the long time limit the statistics of quantum jumps can be understood from thermodynamic arguments in terms of dynamical phases and transitions between them in trajectory space. We illustrate our approach with three simple examples: a driven 2-level system where we find a particular scale invariance point in the ensemble of trajectories of emitted photons; a blinking 3-level system, where we argue that intermittency in the photon count is related to a crossover between distinct dynamical phases; and a micromaser, where we find an actual first-order phase transition in the ensemble of trajectories.