# Generation method of a photonic NOON state with quantum dots in coupled nanocavities

## TL;DR

This paper presents a method to generate high-quality photonic N00N states using quantum dots in coupled nanocavities, leveraging quantum interference and resonant laser excitation, with potential extension to higher N states.

## Contribution

The authors introduce a novel approach for creating N00N states with quantum dots and nanocavities, extending previous two-photon methods to higher N states like N=4.

## Key findings

- N00N state can be generated via resonant laser excitation.
- System can produce N00N states through destructive quantum interference.
- Method demonstrated for N=4 as an example.

## Abstract

We propose a method to generate path-entangled $N00N$-state photons from quantum dots (QDs) and coupled nanocavities. In the systems we considered, cavity mode frequencies are tuned close to the biexciton two-photon resonance. Under appropriate conditions, the system can have the target $N00N$ state in the energy eigenstate, as a consequence of destructive quantum interference. The $N00N$ state can be generated by the resonant laser excitation. This method, first introduced for two-photon $N00N$ state ($N=2$), can be extended toward higher $N00N$ state ($N>2$) based on our recipe, which is applied to the case of $N=4$ as an example.