The nonclassical feature of photons in the open finite-size Dicke model is investigated via the two-photon correlation function. The quantum dressed master equation combined with the extended coherent photonic states is applied to analyze the dissipative dynamics of both the photons and qubits. The anti-bunching to bunching transition of photons is clearly observed by tuning the qubit-photon coupling strength. The optimal qubits number is unraveled to enhance the two-photon correlation function. Moreover, the temperature bias of thermal baths induces significant two-photon bunching signature with deep strong qubit-photon interaction.
@article{arxiv.1909.06706,
title = {Two-photon statistics of nonclassical radiation in the dissipative finite-size Dicke model},
author = {Heguang Xu and Chen Wang and Xianlong Gao},
journal= {arXiv preprint arXiv:1909.06706},
year = {2020}
}