Strong single-photon to two-photon bundles emission in spin-1 Jaynes-Cummings model

TL;DR

This paper demonstrates a spin-1 Jaynes-Cummings model that enables high-quality single-photon and two-photon bundle emission, with controllable nonclassical states useful for quantum information applications.

Contribution

It introduces a spin-1 Jaynes-Cummings model with tunable anharmonicity, enabling controlled generation of nonclassical photon states beyond the strong coupling regime.

Findings

High-quality single-photon emission achieved.

Two-photon bundle emission demonstrated.

Switching between photon blockade and bundle emission controlled by detuning.

Abstract

The realization of high-quality special nonclassical states beyond strong single atom-cavity coupling regime is a fundamental element in quantum information science. Here, we study the nonclassical photon emission in a single spin-1 atom coupled to an optical cavity with constructing a spin-1 Jaynes-Cummings model. By tuning quadratic Zeeman shift, the energy-spectrum anharmonicity can be significantly enhanced with respect to the dressed-state splitting of well-resolved n-photon resonance largely increased. The photon emission exhibit high-quality single photon and two-photon bundles properties with large photon numbers in the cavity and atom driven cases, respectively. More interestingly, nonclassical optical switching from strong single-photon blockade to two-photon bundles and super-Poissonian photon emission is achieved and highly controllable by light-cavity detuning in the presence of both atom and cavity driven fields. Our proposal not only open up a new avenue for generating high-quality n-photon sources but also provide versatile applications in quantum networks and quantum metrology.