Increasing the dimension in high-dimensional two-photon orbital angular momentum entanglement

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Romero, J. and Giovannini, D. and Franke-Arnold, S. and Barnett, S. M. and Padgett, M. J. (2012) Increasing the dimension in high-dimensional two-photon orbital angular momentum entanglement. Physical Review A, 86 (1). 012334. ISSN 1050-2947 (https://doi.org/10.1103/PhysRevA.86.012334)

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Abstract

Any practical experiment utilizing the innate D-dimensional entanglement of the orbital angular momentum (OAM) of photons is subject to the generation capacity of the entangled photon source and the modal capacity of the detection system. We report an experimental spontaneous parametric-down-conversion system able to generate and detect tunable high-dimensional OAM entanglement. By tuning the phase matching, we demonstrate a factor of 2 increase on the half-width of the OAM-correlation spectrum, from 10 to 20. In terms of quantum mutual information capacity, this is an increase from 3.18 to 4.95 bits/photon. Furthermore, we measure correlations in the conjugate variable, angular position, and obtain concurrence values 0.96 and 0.90. The good entanglement measures in both OAM and angular position bases indicate bipartite, D-dimensional entanglement where D is tunable.

  • Item type:Article
    ID code:41159
    Dates:
    Date
    Event
    27 July 2012
    Published
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:17 Sep 2012 15:05
    Last modified:11 Nov 2024 10:13
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/41159
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