| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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In-phase collective unconventional photon blockade and its stability in an asymmetrical cavity containing N bosonic atoms |
| 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,‡ |
1 School of Physics and Electronic Information, Gannan Normal University, Ganzhou 341000, China;
2 Institute of Atomic and Molecular Physics and Functional Materials, School of Mathematics and Physics, Jinggangshan University, Ji'an 343009, China;
3 MOE Key Laboratory of Advanced Micro-Structure Materials, School of Physics Science and Engineering, Tongji University, Shanghai 200092, China;
4 College of Communication Engineering, Hangzhou Dianzi University, Hangzhou 310018, China;
5 Zhejiang Province Key Laboratory of Quantum Technology and Device, Zhejiang University, Hangzhou 310027, China |
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Abstract 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.
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Received: 13 September 2024
Revised: 11 October 2024
Accepted manuscript online: 30 October 2024
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PACS:
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42.50.Pq
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(Cavity quantum electrodynamics; micromasers)
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42.50.Gy
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(Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 12164022 and 12174288), Natural Science Foundation of Jiangxi Province of China (Grant No. 20232BAB201044), Scientific Research Foundation of the Education Department of Jiangxi Province of China (Grant No. GJJ211039), and China Postdoctoral Science Foundation (Grant No. 2023M732028). |
Corresponding Authors:
Xiuwen Xia
E-mail: jgsuxxw@126.com
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Cite this article:
Ying Luo(罗颖), Xinqin Zhang(张新琴), Yi Xiao(肖祎), Jingping Xu(许静平), Haozhen Li(李浩珍), Yaping Yang(羊亚平), and Xiuwen Xia(夏秀文) In-phase collective unconventional photon blockade and its stability in an asymmetrical cavity containing N bosonic atoms 2025 Chin. Phys. B 34 014203
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