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Angular Two-Photon Interference and Angular Two-Qubit States

Source: Phys. Rev. Lett. 104, 010501 (2010); doi:10.1103/PhysRevLett.104.010501

Published 5 January 2010

PACS
  • 03.67.Bg
    Entanglement production and manipulation (quantum information)
  • 42.50.Ex
    Optical implementations of quantum information processing and transfer
  • 42.50.Tx
    Optical angular momentum and its quantum aspects
  • 42.65.Lm
    Parametric down conversion and production of entangled photons
  • YEAR: 2010
PUBLICATION DATA
Publisher:
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Anand Kumar Jha,1 Jonathan Leach,2 Barry Jack,2 Sonja Franke-Arnold,2 Stephen M. Barnett,3 Robert W. Boyd,1 and Miles J. Padgett2
1Institute of Optics, University of Rochester, Rochester, New York 14627, USA
2Department of Physics and Astronomy, SUPA, University of Glasgow, Glasgow, United Kingdom
3Department of Physics, SUPA, University of Strathclyde, Glasgow, United Kingdom
Using angular-positionorbital-angular-momentum entangled photons, we study angular two-photon interference in a scheme in which entangled photons are made to pass through apertures in the form of double angular slits, and using this scheme, we demonstrate an entangled two-qubit state that is based on the angular-position correlations of entangled photons. The entanglement of the two-qubit state is quantified in terms of concurrence. These results provide an additional means for preparing entangled quantum states for use in quantum information protocols. ©2010 The American Physical Society
History: Received 7 August 2009; published 5 January 2010
Permalink: http://link.aps.org/abstract/PRL/v104/e010501
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