里德伯原子辅助光力系统的完美光力诱导透明及慢光效应  

Perfect optomechanically induced transparency and slow light in an Rydberg atom-assisted optomechanical system

作　　者：王鑫 任飞帆 韩嵩 韩海燕[1] 严冬[1] Wang Xin;Ren Fei-Fan;Han Song;Han Hai-Yan;Yan Dong(School of Science and Key Laboratory of Materials Design and Quantum Simulation,Changchun University,Changchun 130022,China;School of Automotive Engineering,Jilin Communications Polytechnic,Changchun 130015,China)

机构地区：[1]长春大学理学院和材料设计与量子模拟实验室,长春130022 [2]吉林交通职业技术学院汽车工程学院,长春130015

出　　处：《物理学报》2023年第9期217-224,共8页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:11874004,11204019);吉林省科技厅自然科学基金(批准号:20210101411JC);长春大学基金资助的课题。

摘　　要：光力诱导透明是典型的量子相消干涉效应,在量子光学和量子信息处理当中具有广泛的应用.本文在里德伯原子系综镶嵌的复合光力学系统中考察了光力诱导透明现象以及由此产生的慢光效应.当考虑非旋转波近似的情况下,可以获得完美的光力诱导透明,即非常狭窄的理想透明窗口.在可分辨边带条件下,微腔品质越高,完美透明窗口中的慢光效应越明显.特别地,与其他原子相比,在实现超慢光方面里德伯原子的长寿命体现了其优越性.Rydberg atoms have attracted considerable attention due to their several singular properties,such as strong long-range interactions,extremely long lifetimes,and very large polarizability.These characteristics make Rydberg atoms a good candidates for cavity quantum electrodynamics,quantum information,and many-body physics.Recently,the study of optomechanics has become a rapidly developing field due to its important applications in cooling of mechanical resonators,implementing precision measurements,slowing light,and preparing quantum entanglement.Obviously,optomechanical systems pave the way for quantum information processing and quantum communication.Specially,there is significant interest in quantum optomechanics due to its high compatibility that can be combined,to build hybrid systems for certain purposes,with the ultracold atoms,a superconducting single electron transistor,a magnetostrictive actuation,a charged oscillator resonator,etc.In this work,we investigate the optomechanically induced transparency(OMIT)and the resulting effect of slow light in a hybrid system composed of a Rydberg atomic ensemble embedded inside a simple optomechanical cavity.As a typical effect of destructive quantum interference,OMIT is widely used in quantum optics and quantum information processing.Based on the Rydberg blockade effect,a Rydberg atomic ensemble in the same blockade region embedded inside an optomechanical cavity can be regarded as a superatom that contains only a single Rydberg excitation.Therefore,the problem of exponentially increasing system size with the number of atoms increasing can be circumvented easily.The hybrid system becomes a coupling between a Rydberg superatom and an optomechanical cavity and the coupling strength is enhanced by a factor of square root of the number of atoms in the ensemble.In this system,the perfect OMIT,namely,an ideal OMIT dip with a very narrow window,can be attained when an effect of non-rotating wave approximation(NRWA)is considered.Further,we demonstrate that the term of NRWA p

关 键 词：光力诱导透明 慢光 里德伯原子 偶极阻塞 

分 类 号：O431.2[机械工程—光学工程]