Two-time correlations probing the dynamics of dissipative many-body quantum systems: aging and fast relaxation.
Two-time correlations probing the dynamics of dissipative many-body quantum systems: aging and fast relaxation.
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DOI：
10.1103/physrevlett.114.170401
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发表时间：
2014-07
影响因子：
8.6
通讯作者：
B. Sciolla;D. Poletti;C. Kollath
中科院分区：
文献类型：
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作者：
B. Sciolla;D. Poletti;C. Kollath
我们利用两时间关联函数研究了耗散多体量子系统的复杂动力学。为了测量，理解和分类这些相关性，我们扩展了绝热消除方法的框架。我们发现，对于相同的参数和时间，两个时间的相关性可以显示两个不同的行为，这取决于所考虑的观察：一个快速的指数衰减或一个慢得多的动态。我们通过研究强相互作用玻色子在双井相位噪声。虽然单粒子相关性随时间呈指数快速衰减，但密度-密度相关性显示缓慢的老化动力学。我们还表明，这种缓慢的弛豫制度是强大的粒子损失。此外，我们使用开发的框架表明，耗散工程状态的动力学特性可以从他们的哈密顿对应物有很大的不同。
We use two-time correlation functions to study the complex dynamics of dissipative many-body quantum systems. In order to measure, understand, and categorize these correlations we extend the framework of the adiabatic elimination method. We show that, for the same parameters and times, two-time correlations can display two distinct behaviors depending on the observable considered: a fast exponential decay or a much slower dynamics. We exemplify these findings by studying strongly interacting bosons in a double well subjected to phase noise. While the single-particle correlations decay exponentially fast with time, the density-density correlations display slow aging dynamics. We also show that this slow relaxation regime is robust against particle losses. Additionally, we use the developed framework to show that the dynamic properties of dissipatively engineered states can be drastically different from their Hamiltonian counterparts.