We develop a scheme for time-frequency encoded continuous-variable cluster-state quantum computing using quantum memories. In particular, we propose a method to produce, manipulate and measure 2D cluster states in a single spatial mode by exploiting the intrinsic time-frequency selectivity of Raman quantum memories. Time-frequency encoding enables the scheme to be extremely compact, requiring a number of memories that is a linear function of only the number of different frequencies in which the computational state is encoded, independent of its temporal duration. We therefore show that quantum memories can be a powerful component for scalable photonic quantum information processing architectures.
@article{arxiv.1405.5361,
title = {Continuous-Variable Quantum Computing in Optical Time-Frequency Modes using Quantum Memories},
author = {Peter C. Humphreys and W. Steven Kolthammer and Joshua Nunn and Marco Barbieri and Animesh Datta and Ian A. Walmsley},
journal= {arXiv preprint arXiv:1405.5361},
year = {2014}
}
Comments
5 pages, 6 figures, and supplementary information. Updated to be consistent with published version