Abstract

The Fano effect arising from the interference between two dissipation channels of the radiation continuum enables tuning of the photon statistics. Understanding the role of the Fano effect and exploiting it to achieve strong photon correlations are of both fundamental and applied significance. We present an analytical description of Fano-enhanced photon correlations based on cavity quantum electrodynamics to show that the Fano effect in atom–cavity systems can improve the degree of antibunching by over four orders of magnitude. The enhancement factors and the optimal conditions are explicitly given, and found to relate to the Fano parameter q. Remarkably, the Fano enhancement manifests robustness against the decoherence processes and can survive in the weak coupling regime. We expect our work to provide insight to tuning the photon statistics through the Fano effect, which offers a new, to the best of our knowledge, route to enhance the photon correlations, as well as the possibility of generating nonclassical light in a wider diversity of systems without the need of a strong light–matter interaction.

© 2022 Optica Publishing Group

Photon antibunching and bunching in a ring-resonator waveguide quantum electrodynamics system

Zihao Chen, Yao Zhou, and Jung-Tsung Shen
Opt. Lett. 41(14) 3313-3316 (2016)

Photon transport enhancement through a coupled-cavity QED system with dynamic modulation

Shinya Kato and Takao Aoki
Opt. Express 30(5) 6798-6807 (2022)

Interaction-free bidirectional multi-channel all-optical switching in a multi-level coupling atom–cavity system

Liyong Wang and Yifu Zhu
Opt. Lett. 47(4) 830-833 (2022)

Controlling photons by phonons via giant atom in a waveguide QED setup

Xinyu Li, Wei Zhao, and Zhihai Wang
Opt. Lett. 48(13) 3595-3598 (2023)

Simultaneous ground-state cooling of multiple degenerate mechanical modes through the cross-Kerr effect

Pengyu Wen, Xuan Mao, Min Wang, Chuan Wang, Gui-Qin Li, and Gui-Lu Long
Opt. Lett. 47(21) 5529-5532 (2022)