Tunable non-Hermiticity through reservoir engineering  

作　　者：XIN MENG ZHIWEI HU XINGDA LU WANXIA CAO XICHANG ZHANG HAOWEI LI YING HU WEI YI YANHONG XIAO 

机构地区：[1]Department of Physics,State Key Laboratory of Surface Physics and Key Laboratory of Micro and Nano Photonic Structures(Ministry of Education),Fudan University,Shanghai 200433,China [2]CAS Key Laboratory of Quantum Information,University of Science and Technology of China,Hefei 230026,China [3]State Key Laboratory of Quantum Optics and Quantum Optics Devices,Institute of Laser Spectroscopy,Shanxi University,Taiyuan 030006,China [4]Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,China [5]CAS Center For Excellence in Quantum Information and Quantum Physics,Hefei 230026,China

出　　处：《Photonics Research》2022年第9期2091-2098,共8页光子学研究（英文版）

基　　金：NSFC-ISF(12161141018);National Natural Science Foundation of China(11974331,12027806,61675047,11874038);National Key Research and Development Program of China(2017YFA0304204,2016YFA0301700,2017YFA0304100,2016YFA0302000)。

摘　　要：We experimentally demonstrate tunable non-Hermitian coupling in an atomic-vapor cell where atomic coherences in different optical channels are dissipatively coupled through atomic motion.Introducing a far-detuned light wall in the reservoir between the optical channels,we decorate the inter-channel coupling term so that it can be switched from dissipative to coherent.The tunable non-Hermiticity is then confirmed through measurements of the inter-channel light transport where the light-wall-induced phase shift is directly probed.Based on the tunable non-Hermiticity,we further discuss an exemplary scheme in which our setup can serve as a building block for the experimental study of exotic non-Hermitian criticality.

关 键 词：TUNABLE SWITCHED CHANNEL 

分 类 号：TM91[电气工程—电力电子与电力传动]