Non-Gaussian quantum states of a multimode light field
Abstract
Even though Gaussian quantum states of multimode light are promising quantum resources due to their scalability, non-Gaussianity is indispensable for quantum technologies, in particular to reach quantum computational advantage. However, embodying non-Gaussianity in a multimode Gaussian state remains a challenge as controllable non-Gaussian operations are hard to implement in a multimode scenario. Here, we report the first generation of non-Gaussian quantum states of a multimode light field by subtracting a photon in a desired mode from multimode Gaussian states, and observe negativity of the Wigner function. For entangled Gaussian states, we observe that photon subtraction makes non-Gaussianity spread among various entangled modes. In addition to applications in quantum technologies, our results shed new light on non-Gaussian multimode entanglement with particular emphasis on quantum networks.
Keywords
Cite
@article{arxiv.1901.10939,
title = {Non-Gaussian quantum states of a multimode light field},
author = {Young-Sik Ra and Adrien Dufour and Mattia Walschaers and Clément Jacquard and Thibault Michel and Claude Fabre and Nicolas Treps},
journal= {arXiv preprint arXiv:1901.10939},
year = {2019}
}