Phys. Rev. Lett. 104, 010501 (2010) [4 pages]Angular Two-Photon Interference and Angular Two-Qubit StatesReceived 7 August 2009; published 5 January 2010 Using angular-position–orbital-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 URL:
http://link.aps.org/doi/10.1103/PhysRevLett.104.010501
DOI:
10.1103/PhysRevLett.104.010501
PACS:
03.67.Bg, 42.50.Ex, 42.50.Tx, 42.65.Lm
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