近日，阿联酋阿布扎比技术创新研究所量子研究中心的Luigi Amico课题组与帝国理工学院的Tobias Haug以及意大利比萨大学的Oliver Morsch等人合作，并取得一项新进展。经过不懈努力，他们实现里德伯原子环形网络中激发态的受控流动。相关研究成果已于2023年8月2日在国际知名学术期刊《物理评论A》上发表。

该研究团队提出利用原子环网络来研究里德伯激励的手性电流。电流通过拉曼方案压印的相位模式进行控制，即使在解相存在的情况下也能持续存在。根据里德伯态的拉比耦合和偶极子-偶极子原子相互作用之间的相互影响，电流表现出明显不同的特征。激励以在时间上显示出一个特征峰的速度传播，反映了电流的手性性质。研究人员发现在淬灭中时间平均电流行为与基态电流相似。这一分析为开发在原子网络中传输信息的新方法铺平了道路。

据悉，高激发态里德伯原子能够为量子模拟和信息处理提供强大的平台。

附：英文原文

Title: Controlled flow of excitations in a ring-shaped network of Rydberg atoms

Author: Francesco Perciavalle, Davide Rossini, Tobias Haug, Oliver Morsch, Luigi Amico

Issue&Volume: 2023/08/02

Abstract: Highly excited Rydberg atoms are a powerful platform for quantum simulation and information processing. Here, we propose atomic ring networks to study chiral currents of Rydberg excitations. The currents are controlled by a phase pattern imprinted via a Raman scheme and can persist even in the presence of dephasing. Depending on the interplay between the Rabi coupling of Rydberg states and the dipole-dipole atom interaction, the current shows markedly different features. The excitations propagate with a velocity displaying a characteristic peak in time, reflecting the chiral nature of the current. We find that the time-averaged current in a quench behaves similarly to the ground-state current. This analysis paves the way for the development of new methods to transport information in atomic networks.

DOI: 10.1103/PhysRevA.108.023305

Source: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.108.023305