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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)‡ |
| Key Laboratory of Advanced Micro-Structured Materials of Ministry of Education, School of Physics Science and Engineering, Tongji University, Shanghai 200092, China |
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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.
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Received: 10 May 2023
Revised: 02 August 2023
Accepted manuscript online: 23 August 2023
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PACS:
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03.65.-w
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(Quantum mechanics)
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42.50.Pq
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(Cavity quantum electrodynamics; micromasers)
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42.50.-p
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(Quantum optics)
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42.50.-p
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(Quantum optics)
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| Fund: 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). |
Corresponding Authors:
Jing-Ping Xu, Ya-Ping Yang
E-mail: xx_jj_pp@tongji.edu.cn;yang_yaping@tongji.edu.cn
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Cite this article:
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) Preparation of squeezed light with low average photon number based on dynamic Casimir effect 2023 Chin. Phys. B 32 120301
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