美国罗切斯特大学Gabriel T. Landi团队提出了排队量子碰撞模型。相关论文发表在2025年3月26日出版的《物理评论A》杂志上。

碰撞模型描述了系统与独立子系统的顺序相互作用。受中性原子阵列最新进展的启发，课题组在这里研究了一个模型，在这个模型中，辅助设备由一个经典控制器控制，该控制器允许它们在等待与系统交互时排队。辅助设备在等待时可以经历个体开放动力学，这可能会导致它们偏离，例如，去相干。

该系统在队列中扮演服务器的角色，在空闲时也可以经历自己的开放动态。研究组证明，该框架极大地推广了量子碰撞模型的现有方法，在适当的范围内恢复了确定性和随机性公式。接下来，他们将展示排队动力学与量子碰撞的结合如何引入丰富的动力学现象，包括相变和对排队统计的强烈依赖。

附：英文原文

Title: Queued quantum collision models

Author: Guilherme Fiusa, Gabriel T. Landi

Issue&Volume: 2025/03/26

Abstract: Collision models describe the sequential interactions of a system with independent ancillas. Motivated by recent advances in neutral atom arrays, here we investigate a model where the ancillas are governed by a classical controller that allows them to queue up while they wait for their turn to interact with the system. The ancillas can undergo individual open dynamics while they wait, which could cause them to, e.g., decohere. The system, which plays the role of the server in the queue, can also undergo its own open dynamics whenever it is idle. We show that this framework greatly generalizes existing approaches for quantum collision models, recovering the deterministic and stochastic formulations in the appropriate limits. Next, we show how the combination of queueing dynamics with quantum collisions introduces rich dynamical phenomena, including phase transitions and a sharp dependence on the queue statistics.

DOI: 10.1103/PhysRevA.111.032220

Source: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.111.032220