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 a~2 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.
作者
李娜
林资鉴
韦梅松
廖明杰
许静平
柯三黄
羊亚平
Na Li;Zi-Jian Lin;Mei-Song Wei;Ming-Jie Liao;Jing-Ping Xu;San-Huang Ke;Ya-Ping Yang(Key Laboratory of Advanced Micro-Structured Materials of Ministry of Education,School of Physics Science and Engineering,Tongji University,Shanghai 200092,China)
基金
supported by the National Natural Science Foundation of China (Grant Nos.12174288,12274326,and 12204352)
the National Key R&D Program of China (Grant No.2021YFA1400602)。
