Quantum Non-Gaussian Multiphoton Light

TL;DR

This paper introduces an experimental method to recognize quantum non-Gaussian multiphoton states, enabling the development and characterization of higher Fock states of light beyond current technical limits, with practical applications in quantum optics.

Contribution

The paper presents a novel experimental technique for identifying quantum non-Gaussian multiphoton states, advancing the ability to analyze higher Fock states and distinguish single-photon emitters.

Findings

Successfully distinguished quantum non-Gaussian light with up to 5 photons at 50% detection efficiency.

Demonstrated the method's capability to identify higher Fock states beyond existing generation limits.

Provided evidence for using the method to determine the number of single-photon emitters from collective emission.

Abstract

We propose an experimental method of recognizing quantum non-Gaussian multiphoton states. This is a native quantum property of Fock states, the fundamental quantum states with a constant number of particles. Our method allows experimental development and characterization of higher Fock states of light, reaching even beyond the current technical limits of their generation. We experimentally demonstrate that it is capable of distinguishing realistic quantum non-Gaussian light with the mean number of photons up to 5 despite detection efficiency of 50 %. We also provide evidence that our method can help to distinguish the number of single-photon emitters based only on their collective emission.