Nonclassicality of photons in mean-field anisotropic quantum light–matter interacting lattices: Two-photon correlation function and quadrature squeezing

• Published in: Chinese physics B Vol. 34; no. 4; pp. 44201 - 44208
• Main Authors: Chen, Xu-Min, Chen, Pei-Yao, Wang, Chen
• Format: Journal Article
• Language: English
• Published: Chinese Physical Society and IOP Publishing Ltd 01.03.2025
• Subjects: coherent control of atomic interactions with photons; photon statistics and coherence theory; quantum optics
• ISSN: 1674-1056; 2058-3834
• DOI: 10.1088/1674-1056/ada9db

The generation of nonclassical photons via quantum light–matter interactions is of fundamental importance in quantum optics. Here we investigate steady-state two-photon correlation function and photon squeezing in an open anisotropic Rabi lattice by applying quantum dressed master equation embedded with the mean-field approximation. The expanded antibunching effect of photons due to anisotropic qubit–photon interaction, is strongly suppressed by including inter-site photon tunneling, whereas the giant photon bunching keeps robust with weak inter-site photon tunneling strength. The microscopic processes for photon antibunching and bunching effects are presented based on incoherent transitions between eigenstates. The photon squeezing is also analyzed under the influences of qubit–photon coupling and anisotropic factor. The quadrature squeezing shows persistency by tuning on the inter-site photon tunneling, and becomes dramatically pronounced at the small anisotropic factor. Moreover, the increasing number of qubits significantly enhances quadrature squeezing with strong qubit–photon interaction. We hope such results may provide physical insights into efficient generation and manipulation of nonclassical features of photons in quantum light–matter interacting lattice systems.