We propose an experimental design for universal continuous-variable quantum computation that incorporates recent innovations in linear-optics-based continuous-variable cluster state generation and cubic-phase gate teleportation. The first ingredient is a protocol for generating the bilayer-square-lattice cluster state (a universal resource state) with temporal modes of light. With this state, measurement-based implementation of Gaussian unitary gates requires only homodyne detection. Second, we describe a measurement device that implements an adaptive cubic-phase gate, up to a random phase-space displacement. It requires a two-step sequence of homodyne measurements and consumes a (non-Gaussian) cubic-phase state.
@article{arxiv.1711.08782,
title = {Universal quantum computation with temporal-mode bilayer square lattices},
author = {Rafael N. Alexander and Shota Yokoyama and Akira Furusawa and Nicolas C. Menicucci},
journal= {arXiv preprint arXiv:1711.08782},
year = {2018}
}
Comments
(v2) 14 pages, 5 figures, consistent with published version; (v1) 13 pages, 5 figures