Tunable multiphoton bundles emission in a Kerr-type two-photon Jaynes-Cummings model

TL;DR

This paper demonstrates how Kerr nonlinearity enhances multiphoton emission control in a two-photon Jaynes-Cummings system, enabling nonclassical state generation and potential quantum information applications.

Contribution

It introduces a method to manipulate multiphoton bundles using Kerr interaction in a two-photon JC model, surpassing strong-coupling limitations.

Findings

Enhanced vacuum-Rabi splittings for dressed states due to Kerr interaction

Observation of two- and three-photon blockades with adjustable parameters

Controlled transitions between photon bundles via tuning system parameters

Abstract

We present a study on manipulation and enhancement of multiphoton bundles emission under a moderate atom-cavity coupling, by constructing a two-photon Jaynes-Cummings model integrated with Kerr nonlinearity in a single atom-cavity system. We show that the vacuum-Rabi splittings for the $n$th dressed states can be significantly enhanced by Kerr interaction. This remarkable enhancement in energy-spectrum anharmonicity with the well-resolved multiphoton resonance facilitates the generation of special nonclassical states beyond the strong-coupling limit in the experiment. In particular, both two- and three-photon blockades are observed with adjusting the amplitude of the cavity-driving or atom-pump fields. Moreover, we discover that transitions between two- and three-photon bundles can be achieved through tuning the atom-cavity detuning or Kerr nonlinearity. It further showcases the three-photon blockade is substantially strengthened when both the cavity and atomic fields are jointly driven. Our proposal unveils a pathway for realizing highly controllable nonclassical states and quantum devices with combining two-photon Jaynes-Cummings interactions and Kerr nonlinearity, which may pave the way for versatile applications in quantum information science, e.g., all-optical switches and transistors.