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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry van Driel
  • Vol. 27, Iss. 6 — Jun. 1, 2010
  • pp: A181–A184

Simple scheme for expanding photonic cluster states for quantum information

P. Kalasuwan, G. Mendoza, A. Laing, T. Nagata, J. Coggins, M. Callaway, S. Takeuchi, A. Stefanov, and J. L. O’Brien  »View Author Affiliations


JOSA B, Vol. 27, Issue 6, pp. A181-A184 (2010)
http://dx.doi.org/10.1364/JOSAB.27.00A181


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Abstract

We show how an entangled cluster state encoded in the polarization of single photons can be straightforwardly expanded by deterministically entangling additional qubits encoded in the path degree of freedom of the constituent photons. This can be achieved using a polarization–path controlled-phase gate. We experimentally demonstrate a practical and stable realization of this approach by using a Sagnac interferometer to entangle a path qubit and polarization qubit on a single photon. We demonstrate precise control over phase of the path qubit to change the measurement basis and experimentally demonstrate properties of measurement-based quantum computing using a two-photon, three-qubit cluster state.

© 2010 Optical Society of America

OCIS Codes
(200.3050) Optics in computing : Information processing
(270.0270) Quantum optics : Quantum optics
(270.5585) Quantum optics : Quantum information and processing

ToC Category:
Entanglement in Photonic Systems

History
Original Manuscript: December 4, 2009
Revised Manuscript: March 5, 2009
Manuscript Accepted: March 26, 2009
Published: May 24, 2010

Citation
P. Kalasuwan, G. Mendoza, A. Laing, T. Nagata, J. Coggins, M. Callaway, S. Takeuchi, A. Stefanov, and J. L. O’Brien, "Simple scheme for expanding photonic cluster states for quantum information," J. Opt. Soc. Am. B 27, A181-A184 (2010)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-27-6-A181

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