Quantum optics of nonlinear systems in cascade

TL;DR

This paper explores how cascading driven-dissipative nonlinear systems enhances nonclassical light properties, such as antibunching and entanglement, across various physical platforms with Kerr-like nonlinearities.

Contribution

It demonstrates that noncoherent pumping in cascade configurations improves antibunching and enables entanglement generation in nonlinear quantum optical systems.

Findings

Noncoherent pumping enhances antibunching.

Dissipative coupling can generate entanglement.

Applicable to Rydberg atoms and exciton polaritons.

Abstract

In this letter, we investigate the quantum optical properties of driven-dissipative nonlinear systems in a cascade configuration. We show that pumping a nonlinear system with a state having a noncoherent statistics, can improve the antibunching of the output state and, consequently, the nonclassicality of the whole system. Furthermore, we show that is possible to generate entanglement through dissipative coupling. These results applies to a broad category of physical systems with a Kerr-like non-linearity, from Rydberg atoms to exciton polaritons in microcavities.