Quantum non-equilibrium dynamics of Rydberg gases in the presence of dephasing noise of different strengths
Quantum non-equilibrium dynamics of Rydberg gases in the presence of dephasing noise of different strengths
复制标题
存在不同强度的相移噪声时里德伯气体的量子非平衡动力学
DOI：
10.1088/0953-4075/49/18/184003
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
I. Lesanovsky
中科院分区：
文献类型：
--
作者：
E. Levi;R. Gutiérrez;I. Lesanovsky
在强退相噪声的存在下，由于原子能级之间的量子叠加的快速衰减，里德伯气体的动力学变得有效地经典。最近大量的注意力已经投入到随机动力学，出现在该限制，揭示了一些有趣的功能，包括动力学约束的玻璃态行为，自相似性和聚集效应。然而，这些系统的非平衡物理学，特别是在相干过程和耗散过程同等作用的情况下，还远未被理解。为了探索这一点，我们研究了一个小的一维里德堡晶格气体的动力学受到退相噪声的量子主方程的数值积分。我们插值之间的连贯性和强烈的disphased制度，通过定义一个概括的概念的封锁长度。我们发现的迹象表明，在强耗散极限观察到的主要特征持续时，耗散是不是足够强，湮灭量子相干在动态相关的时间尺度。这些功能包括一个依赖于时间的里德伯封锁半径的存在，和增长的密度的激发，这是兼容的幂律行为预期在经典的限制。
In the presence of strong dephasing noise the dynamics of Rydberg gases becomes effectively classical, due to the rapid decay of quantum superpositions between atomic levels. Recently a great deal of attention has been devoted to the stochastic dynamics that emerges in that limit, revealing several interesting features, including kinetically constrained glassy behaviour, self-similarity and aggregation effects. However, the non-equilibrium physics of these systems, in particular in the regime where coherent and dissipative processes contribute on equal footing, is yet far from being understood. To explore this we study the dynamics of a small one-dimensional Rydberg lattice gas subject to dephasing noise by numerically integrating the quantum master equation. We interpolate between the coherent and the strongly dephased regime by defining a generalised concept of a blockade length. We find indications that the main features observed in the strongly dissipative limit persist when the dissipation is not strong enough to annihilate quantum coherences at the dynamically relevant time scales. These features include the existence of a time-dependent Rydberg blockade radius, and a growth of the density of excitations which is compatible with the power-law behaviour expected in the classical limit.
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影响因子：
8.6
作者：
H. Weimer;R. Löw;T. Pfau;H. Büchler
通讯作者：
H. Weimer;R. Löw;T. Pfau;H. Büchler
影响因子：
8.6
作者：
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通讯作者：
Weatherill, K. J.
影响因子：
8.6
作者：
C. Ates;J. P. Garrahan;Igor Lesanovsky
通讯作者：
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影响因子：
8.6
作者：
S. Ji;C. Ates;I. Lesanovsky
通讯作者：
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