Fast and simple scheme for generating NOON states of photons in circuit QED

TL;DR

This paper presents a fast, simple method to generate NOON states of photons in circuit QED using a single superconducting transmon qutrit, simplifying experimental setup and implementation.

Contribution

It introduces a novel scheme utilizing only one qutrit and two resonators, reducing complexity and increasing speed over previous methods.

Findings

Simplified experimental setup with fewer components.

Faster implementation compared to prior schemes.

Potential for improved quantum communication applications.

Abstract

The generation, manipulation and fundamental understanding of entanglement lies at very heart of quantum mechanics. Among various types of entangled states, the NOON states are a kind of special quantum entangled states with two orthogonal component states in maximal superposition, which have a wide range of potential applications in quantum communication and quantum information processing. Here, we propose a fast and simple scheme for generating NOON states of photons in two superconducting resonators by using a single superconducting transmon qutrit. Because only one superconducting qutrit and two resonators are used, the experimental setup for this scheme is much simplified when compared with the previous proposals requiring a setup of two superconducting qutrits and three cavities. In addition, this scheme is easier and faster to implement than the previous proposals, which require using a complex microwave pulse, or a small pulse Rabi frequency in order to avoid nonresonant transitions.