Resource-Efficient Linear Optical Quantum Computation

Daniel E. Browne and Terry Rudolph
Phys. Rev. Lett. 95, 010501 – Published 27 June 2005

Abstract

We introduce a scheme for linear optics quantum computation, that makes no use of teleported gates, and requires stable interferometry over only the coherence length of the photons. We achieve a much greater degree of efficiency and a simpler implementation than previous proposals. We follow the “cluster state” measurement based quantum computational approach, and show how cluster states may be efficiently generated from pairs of maximally polarization entangled photons using linear optical elements. We demonstrate the universality and usefulness of generic parity measurements, as well as introducing the use of redundant encoding of qubits to enable utilization of destructive measurements—both features of use in a more general context.

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  • Received 26 May 2004

DOI:https://doi.org/10.1103/PhysRevLett.95.010501

©2005 American Physical Society

Authors & Affiliations

Daniel E. Browne1,2 and Terry Rudolph1,3

  • 1QOLS, Blackett Laboratory, Imperial College London, Prince Consort Road, London SW7 2BW, United Kingdom
  • 2Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom
  • 3Institute for Mathematical Sciences, Imperial College London, Exhibition Road, London SW7 2BW, United Kingdom

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Issue

Vol. 95, Iss. 1 — 1 July 2005

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