Continuous variable entanglement on a chip
Abstract
Encoding quantum information in continuous variables (CV)---as the quadrature of electromagnetic fields---is a powerful approach to quantum information science and technology. CV entanglement---light beams in Einstein-Podolsky-Rosen (EPR) states---is a key resource for quantum information protocols; and enables hybridisation between CV and single photon discrete variable (DV) qubit systems. However, CV systems are currently limited by their implementation in free-space optical networks: increased complexity, low loss, high-precision alignment and stability, as well as hybridisation, demand an alternative approach. Here we show an integrated photonic implementation of the key capabilities for CV quantum technologies---generation and characterisation of EPR beams in a photonic chip. Combined with integrated squeezing and non-Gaussian operation, these results open the way to universal quantum information processing with light.
Cite
@article{arxiv.1505.07895,
title = {Continuous variable entanglement on a chip},
author = {Genta Masada and Kazunori Miyata and Alberto Politi and Toshikazu Hashimoto and Jeremy L. O'Brien and Akira Furusawa},
journal= {arXiv preprint arXiv:1505.07895},
year = {2015}
}