文献类型：期刊文献

英文题名：Non-Hermitian Superradiance Lattices with Room-Temperature Atoms

作者：Zhang, Ying[1,2];Liu, Lifeng[1];Sheng, Tianze[1];Qian, Jun[1];Niu, Yueping[1,3];Gong, Jiangbin[4,5,6];Gong, Shangqing[1,3,7]

机构：[1]East China Univ Sci & Technol, Sch Phys, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[3]Shanghai Engn Res Ctr Hierarch Nanomat, Shanghai 200237, Peoples R China;[4]Natl Univ Singapore, Dept Phys, Singapore 117551, Singapore;[5]Natl Univ Singapore, Ctr Quantum Technol, Singapore 117543, Singapore;[6]Tianjin Univ, Joint Sch Natl Univ Singapore, Int Campus Tianjin Univ, Fuzhou 350207, Peoples R China;[7]Hefei Natl Lab, Hefei 230088, Peoples R China

年份：2026

卷号：20

期号：3

外文期刊名：LASER & PHOTONICS REVIEWS

收录：;EI(收录号：20254119290665);WOS:【SCI-EXPANDED(收录号:WOS:001581809000001)】；

基金：This work was supported by the National Natural Science Foundation of China (Grant Nos. 12034007 and 12374327), Shanghai Outstanding Academic Leaders Program (Grant No. 21XD1400700), the Key project of Shanghai Municipal Education Commission (Grant No. 2023ZKZD39),and Innovation Program for Quantum Science and Technology (Grant No.2021ZD0300802). J.G. acknowledges support by the National Research Foundation, Singapore and A*STAR under its CQT Bridging Grant.r No Statement Availabler No Statement Availabler No Statement Available

语种：英文

外文关键词：atomic ensemble; global Berry phase; non-Hermitian absorption; superradiance lattice; Wannier-Stark ladder

摘要：Composed of some collective excited states of an atomic ensemble, a superradiance lattice can be considered as an infinite tight-binding model in momentum space. In this work, a non-Hermitian superradiance lattice is realized by introducing state-selective dissipation rates, using room-temperature atoms. The steady-state response of such a non-Hermitian momentum lattice is studied with non-Hermitian absorption spectroscopy both theoretically and experimentally. A pit-to-peak transition in the spectroscopy is observed when the introduced dissipation rates are tuned. Further, by accounting for the thermal motion of atoms, the Wannier Stark ladders and biorthogonal Berry phases are measured. This work hence realizes a quantum platform that can be highly useful for future experimental simulation of non-Hermitian physics (e.g., non-Hermitian topological lattice) with room-temperature atoms.