中国物理B ›› 2025, Vol. 34 ›› Issue (1): 14203-014203.doi: 10.1088/1674-1056/ad8cbf
• • 上一篇
Ying Luo(罗颖)1,2,†, Xinqin Zhang(张新琴)2,†, Yi Xiao(肖祎)2, Jingping Xu(许静平)3, Haozhen Li(李浩珍)4, Yaping Yang(羊亚平)3, and Xiuwen Xia(夏秀文)2,5,3,‡
Ying Luo(罗颖)1,2,†, Xinqin Zhang(张新琴)2,†, Yi Xiao(肖祎)2, Jingping Xu(许静平)3, Haozhen Li(李浩珍)4, Yaping Yang(羊亚平)3, and Xiuwen Xia(夏秀文)2,5,3,‡
摘要: We present work on a cavity-driven QED system combining an asymmetrical Fabry-Perot cavity and $N$ two-level atoms (TLAs) and show the convenience of simplifying from distinguishable atoms to undistinguishable bosons when the atoms are prepared in the same initial state. Such simplification is valid even when the atoms are not prepared in the in-phase condition, since any partial in-phase initial state will evolve into the ground state through a relaxation process. Thus, we get a reduced group of differential equations by introducing the Dicke states, and the under-zero Lyapunov exponents verify its stability. We also work out the collective unconventional photon blockade (UCPB) and get two kinds of giant nonreciprocal UCPBs (NUCPBs) in the weak-driving approximation. Results show that we can employ $N$ noninteracting bosonic atoms to generate a collective UCPB instead of a monoatomic UCPB as the UCPB conditions do not vary with the number of atoms. Furthermore, the forward giant NUCPB only occurring for $N$ larger than a certain number as well as the backward giant NUCPB are controllable by the cavity asymmetry and by the number of atoms. Our findings suggest a prospective approach to the generation of quantum nonreciprocity by $N$ identical atoms.
中图分类号: (Cavity quantum electrodynamics; micromasers)