冷原子系统中里德堡集体激发态的尺寸缩小效应  

Size-reduction of Rydberg collective excited states in cold atomic system

作　　者：丁冬生[1,2] 于溢琛 刘宗凯 史保森[1,2] 郭光灿[1,2] Dongsheng Ding;Yichen Yu;Zongkai Liu;Baosen Shi;Guangcan Guo(Key Laboratory of Quantum Information,University of Science and Technology of China,Hefei 230026,China;Synergetic Innovation Center of Quantum Information and Quantum Physics,University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]中国科学技术大学中科院量子信息重点实验室,安徽合肥230026 [2]中国科学技术大学量子信息与量子物理协同创新中心,安徽合肥230026

出　　处：《中国科学技术大学学报》2022年第4期1-7,I0002,共8页JUSTC

基　　金：supported by the National Key R&D Program of China (2017YFA0304800);the National Natural Science Foundation of China (U20A20218, 61525504,61435011);Fundamental Research Funds for the Central Universities;the Youth Innovation Promotion Association of C AS(2018490)。

摘　　要：原子的集体效应表现出光和原子之间增强的相互作用,这在量子光学和量子信息领域有重要的研究意义。当原子的状态发生变化时,拉比振荡会表现出丰富的动力学特性。本文报道了在冷原子气体中拉比振荡过程中里德堡原子集体态的尺寸缩小效应。首先通过存储制备了里德堡原子集体激发态,再测量辐射光子的时间变化曲线。观察到振荡频率的降低效应,这表现出啁啾特性,这是由于集体态的衰减和基态原子损失引起的。该结果有助于研究里德堡原子的集体效应的动力学行为以及操纵单光子波包。The collective effect of large amounts of atoms exhibit an enhanced interaction between light and atoms. This holds great interest in quantum optics, and quantum information. When a collective excited state of a group of atoms during Rabi oscillation is varying, the oscillation exhibits rich dynamics. Here, we experimentally observe a size-reduction effect of the Rydberg collective state during Rabi oscillation in cold atomic dilute gases. The Rydberg collective state was first created by the Rydberg quantum memory, and we observed a decreased oscillation frequency effect by measuring the time traces of the retrieved light field amplitude, which exhibited chirped characteristics. This is caused by the simultaneous decay to the overall ground state and the overall loss of atoms. The observed oscillations are dependent on the effective Rabi frequency and detuning of the coupling laser, and the dephasing from inhomogeneous broadening. The reported results show the potential prospects of studying the dynamics of the collective effect of a large amount of atoms and manipulating a single-photon wave-packet based on the interaction between light and Rydberg atoms.

关 键 词：里德堡原子 量子存储 集体激发态 

分 类 号：O431.2[机械工程—光学工程]