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arXiv 1705.03215quant-ph
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复合量子碰撞模型

Composite quantum collision models

Salvatore Lorenzo, Francesco Ciccarello, G. Massimo Palma

摘要:

碰撞模型(CM)是描述开放量子动力学的框架。在它的{ \it无记忆}版本中,它将储层$\mathcal R$模拟为由大量基本附属物组成:开放系统$\mathcal{S}$的动力学是由$\mathcal{S}$与$\mathcal R$的附属物连续“碰撞”产生的。在这里,我们提出了一个一般的配方无记忆{ \it复合} CM,其中$\mathcal S$被分割成非常开放的系统研究$S$耦合到一个或多个辅助系统$\{S_i\}$。它们的复合动力学通过内部$S$碰撞发生,其中散布着涉及$\{S_i\}$和储层$\mathcal R$的外部碰撞。我们表明,重要的已知实例的量子{ \it非马尔可夫}动力学的$S$ -如发射到一个水库具有洛伦兹,或多洛伦兹,频谱密度或量子比特随机电报噪声-可以映射到这样的{ \it无记忆}复合CM。

英文摘要:

A collision model (CM) is a framework to describe open quantum dynamics. In its {\it memoryless} version, it models the reservoir $\mathcal R$ as consisting of a large collection of elementary ancillas: the dynamics of the open system $\mathcal{S}$ results from successive "collisions" of $\mathcal{S}$ with the ancillas of $\mathcal R$. Here, we present a general formulation of memoryless {\it composite} CMs, where $\mathcal S$ is partitioned into the very open system under study $S$ coupled to one or more auxiliary systems $\{S_i\}$. Their composite dynamics occurs through internal $S$-$\{S_i\}$ collisions interspersed with external ones involving $\{S_i\}$ and the reservoir $\mathcal R$. We show that important known instances of quantum {\it non-Markovian} dynamics of $S$ -- such as the emission of an atom into a reservoir featuring a Lorentzian, or multi-Lorentzian, spectral density or a qubit subject to random telegraph noise -- can be mapped on to such {\it memoryless} composite CMs.

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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