论文标题
通过量子碰撞模型揭示马尔可夫向非马克维亚过渡
Unveiling the Markovian to non-Markovian transition with quantum collision models
论文作者
论文摘要
开放量子系统中非马克维亚性的概念传统上与信息从环境到系统的反流的存在有关。同时，这种反流出现的机制仍然是一个争论的主题。在这项工作中，我们使用碰撞模型来研究与由几个Ancillas组成的热浴的量子系统动力学中的记忆效应，其中考虑了System-Cancilla和Ancilla-Ancilla相互作用。在单齐限限制的情况下，我们表明，系统培训信息流表现出混乱和常规振荡行为的有趣混合物，这取决于相互作用的概率。同时，我们的结果清楚地表明，当将新的Ancillas添加到浴室中时，信息会下降，这阐明了马尔可夫人的性质到非马克维亚过渡的性质。
The concept of non-Markovianity in open quantum systems is traditionally associated with the existence of information backflows from the environment to the system. Meanwhile, the mechanisms through which such backflows emerge are still a subject of debate. In this work, we use collision models to study memory effects in the dynamics of a qubit system in contact with a thermal bath made up of few ancillas, in which system-ancilla and ancilla-ancilla interactions are considered. In the single-ancilla limit case, we show that the system-bath information flow exhibits an interesting mixture of chaotic and regular oscillatory behavior, which depends on the interaction probabilities. In parallel, our results clearly indicate that the information backflows decrease when new ancillas are added to the bath, which sheds light on the nature of the Markovian to non-Markovian transition.
