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arXiv 2107.01692quant-phcond-mat.stat-mech
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一类可解的非马尔可夫量子多体动力学

A solvable class of non-Markovian quantum multipartite dynamics

Adrián A. Budini, Juan P. Garrahan

摘要:

研究了一类任意数量量子比特系统的多体开放量子动力学。非马尔可夫量子主方程可以包含任意的单粒子或多粒子以及依赖于时间的耗散耦合机制,用泡利算符的弦表示。我们制定的一般约束,保证这种动态的完全积极性。我们详细描述了导致记忆效应的潜在机制,以及相关系统速率中编码的动态特性。我们具体推导出多部“永恒的”非马尔可夫主方程,我们长期的双曲和三角由于其速率的时间依赖性。对于这些模型,我们确定了一个过渡之间的积极和周期性的分歧率。我们还研究了非马尔可夫效应,通过操作(测量为基础的)记忆证人的方法。

英文摘要:

We study a class of multipartite open quantum dynamics for systems of arbitrary number of qubits. The non-Markovian quantum master equation can involve arbitrary single or multipartite and time-dependent dissipative coupling mechanisms, expressed in terms of strings of Pauli operators. We formulate the general constraints that guarantee the complete positivity of this dynamics. We characterize in detail underlying mechanisms that lead to memory effects, together with properties of the dynamics encoded in the associated system rates. We specifically derive multipartite "eternal" non-Markovian master equations that we term hyperbolic and trigonometric due to the time dependence of their rates. For these models we identify a transition between positive and periodically divergent rates. We also study non-Markovian effects through an operational (measurement-based) memory witness approach.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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