中国物理B ›› 2023, Vol. 32 ›› Issue (12): 120301-120301.doi: 10.1088/1674-1056/acf2ff

• • 上一篇    下一篇

Preparation of squeezed light with low average photon number based on dynamic Casimir effect

Na Li(李娜), Zi-Jian Lin(林资鉴), Mei-Song Wei(韦梅松), Ming-Jie Liao(廖明杰),Jing-Ping Xu(许静平), San-Huang Ke(柯三黄), and Ya-Ping Yang(羊亚平)   

  1. Key Laboratory of Advanced Micro-Structured Materials of Ministry of Education, School of Physics Science and Engineering, Tongji University, Shanghai 200092, China
  • 收稿日期:2023-05-10 修回日期:2023-08-02 接受日期:2023-08-23 出版日期:2023-11-14 发布日期:2023-11-27
  • 通讯作者: Jing-Ping Xu, Ya-Ping Yang E-mail:xx_jj_pp@tongji.edu.cn;yang_yaping@tongji.edu.cn
  • 基金资助:
    This work was supported by the National Natural Science Foundation of China (Grant Nos.12174288, 12274326, and 12204352) and the National Key R&D Program of China (Grant No.2021YFA1400602).

Preparation of squeezed light with low average photon number based on dynamic Casimir effect

Na Li(李娜), Zi-Jian Lin(林资鉴), Mei-Song Wei(韦梅松), Ming-Jie Liao(廖明杰),Jing-Ping Xu(许静平), San-Huang Ke(柯三黄), and Ya-Ping Yang(羊亚平)   

  1. Key Laboratory of Advanced Micro-Structured Materials of Ministry of Education, School of Physics Science and Engineering, Tongji University, Shanghai 200092, China
  • Received:2023-05-10 Revised:2023-08-02 Accepted:2023-08-23 Online:2023-11-14 Published:2023-11-27
  • Contact: Jing-Ping Xu, Ya-Ping Yang E-mail:xx_jj_pp@tongji.edu.cn;yang_yaping@tongji.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (Grant Nos.12174288, 12274326, and 12204352) and the National Key R&D Program of China (Grant No.2021YFA1400602).

摘要: It is well known that squeezed states can be produced by nonlinear optical processes, such as parametric amplification and four wave mixing, in which two photons are created or annihilated simultaneously. Since the Hamiltonian of the dynamic Casimir effect contains a2 and a+2, photons in such a process are also generated or annihilated in pairs. Here we propose to get squeezed light through the dynamic Casimir effect. Specifically, we demonstrate it from the full quantum perspective and the semiclassical perspective successively. Different from previous work, we focus on generating squeezed states with the lowest average photon number, because such squeezed states have better quantum properties. For the full quantum picture, that is, phonons also have quantum properties, when the system is initially in the excited state of phonons, squeezed light cannot be generated during the evolution, but the light field can collapse to the squeezed state by measuring the state of phonons. When the phonon is treated as a classical quantity, that is, the cavity wall is continuously driven, squeezed light with the minimum average photon number will be generated in the case of off-resonance. This will play a positive role in better regulating the photon state generated by the dynamic Casimir system in the future.

关键词: cavity quantum electrodynamics, quantum optics, squeezed light

Abstract: It is well known that squeezed states can be produced by nonlinear optical processes, such as parametric amplification and four wave mixing, in which two photons are created or annihilated simultaneously. Since the Hamiltonian of the dynamic Casimir effect contains a2 and a+2, photons in such a process are also generated or annihilated in pairs. Here we propose to get squeezed light through the dynamic Casimir effect. Specifically, we demonstrate it from the full quantum perspective and the semiclassical perspective successively. Different from previous work, we focus on generating squeezed states with the lowest average photon number, because such squeezed states have better quantum properties. For the full quantum picture, that is, phonons also have quantum properties, when the system is initially in the excited state of phonons, squeezed light cannot be generated during the evolution, but the light field can collapse to the squeezed state by measuring the state of phonons. When the phonon is treated as a classical quantity, that is, the cavity wall is continuously driven, squeezed light with the minimum average photon number will be generated in the case of off-resonance. This will play a positive role in better regulating the photon state generated by the dynamic Casimir system in the future.

Key words: cavity quantum electrodynamics, quantum optics, squeezed light

中图分类号:  (Quantum mechanics)

  • 03.65.-w
42.50.Pq (Cavity quantum electrodynamics; micromasers) 42.50.-p (Quantum optics) 42.50.-p (Quantum optics)