Continuous-Variable Quantum Computing in Optical Time-Frequency Modes Using Quantum Memories

Peter C. Humphreys, W. Steven Kolthammer, Joshua Nunn, Marco Barbieri, Animesh Datta, and Ian A. Walmsley
Phys. Rev. Lett. 113, 130502 – Published 25 September 2014
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Abstract

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 two-dimensional 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 are 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.

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  • Received 2 May 2014

DOI:https://doi.org/10.1103/PhysRevLett.113.130502

© 2014 American Physical Society

Authors & Affiliations

Peter C. Humphreys1, W. Steven Kolthammer1, Joshua Nunn1, Marco Barbieri1,2, Animesh Datta1, and Ian A. Walmsley1

  • 1Department of Physics, Clarendon Laboratory, University of Oxford, Oxford OX1 3PU, United Kingdom
  • 2Dipartimento di Scienze, Universit degli Studi Roma Tre, Via della Vasca Navale 84, 00154 Rome, Italy

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Issue

Vol. 113, Iss. 13 — 26 September 2014

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