Hybrid photon blockade with hyperradiance in two-qubit cavity QED system

TL;DR

This paper proposes a hybrid photon blockade scheme in a two-qubit cavity QED system that combines energy-level anharmonicity and quantum interference, achieving high brightness and strong antibunching, with hyperradiance indicating enhanced collective emission.

Contribution

It introduces a novel hybrid photon blockade mechanism leveraging both anharmonicity and interference, tunable via detuning, applicable across various quantum platforms.

Findings

Identified parametric regimes for optimal photon blockade and hyperradiance.

Demonstrated the scheme's robustness across different coupling asymmetries.

Showed potential for high-quality single-photon source generation.

Abstract

We investigate a hybrid photon blockade (HPB) scheme in a driven two-qubit cavity QED system arising from the combination of eigenenergy-level anharmonicity (ELA) and quantum destructive interference (QDI). By tuning the detuning of a single qubit and pumping field, we identify precise parametric regimes that fully integrate the advantages of high brightness in ELA-based conventional photon blockade and strong antibunching in QDI-based unconventional photon blockade. Interestingly, these regimes are accompanied by hyperradiance, indicating that inter-emitter correlations give rise to enhanced collective emission. The HPB mechanism exhibits parametric generality across varying coupling asymmetries and remains accessible via detuning control, offering a feasible route for generating high-quality single-photon source in diverse quantum platforms.