Multiphoton nonclassical state generated by hyperradiance originating from a quasi-subradiant state
Teng Zhao, Yan Yan, Guoqing Yang, Guangming Huang, Yifu Zhu, Gao‐xiang Li · Physical Review A · 2019
In a driven cavity QED system with two nonidentical qubits of different resonant frequencies, a multiphoton nonclassical state can be generated by single-photon and two-photon cavity-induced transparency (CIT). Due to the existence of the quasi-subradiant state, the parameter of radiance witness $R$ can be greater than unity, which demonstrates that the cavity QED system is in the hyperradiance regime. In this hyperradiance regime, although the second-order correlation function ${g}^{(2)}(0)$ is greater than unity, the photon statistics still exhibits the higher-order sub-Poissonian distribution. Because the single-photon and two-photon processes are suppressed by CIT-like effects, the three-photon process is enhanced, which leads to Klyshko's criterion ${K}_{n}2$, indicating the appearance of multiphoton nonclassicality. Based on this principle, we propose a scheme for preparing multiphoton nonclassical light with a three-photon probability of ${10}^{\ensuremath{-}4}$, which is feasible for experiment.