We present a compact experimental design for producing an arbitrarily large optical continuous-variable cluster state using just one single-mode vacuum squeezer and one quantum nondemolition gate. Generating the cluster state and computing with it happen simultaneously: more entangled modes become available as previous modes are measured, thereby making finite the requirements for coherence and stability even as the computation length increases indefinitely.
@article{arxiv.1002.4094,
title = {Arbitrarily Large Continuous-Variable Cluster States from a Single Quantum Nondemolition Gate},
author = {Nicolas C. Menicucci and Xian Ma and Timothy C. Ralph},
journal= {arXiv preprint arXiv:1002.4094},
year = {2010}
}
Comments
(v2) 5 pages, 4 color figures, added brief mention of fault tolerance, version accepted for publication (note: actual published version is edited slightly for space); (v1) 4 pages, 4 color figures