Entanglement of arbitrary superpositions of modes within two-dimensional orbital angular momentum state spaces

Jack, B. and Yao, A. M. and Leach, J. and Romero, J. and Franke-Arnold, S. and Ireland, D. G. and Barnett, S. M. and Padgett, M. J. (2010) Entanglement of arbitrary superpositions of modes within two-dimensional orbital angular momentum state spaces. Physical Review A, 81 (4). 043844. ISSN 1050-2947 (https://doi.org/10.1103/PhysRevA.81.043844)

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Abstract

We use spatial light modulators (SLMs) to measure correlations between arbitrary superpositions of orbital angular momentum (OAM) states generated by spontaneous parametric down-conversion. Our technique allows us to fully access a two-dimensional OAM subspace described by a Bloch sphere, within the higher-dimensional OAM Hilbert space. We quantify the entanglement through violations of a Bell-type inequality for pairs of modal superpositions that lie on equatorial, polar, and arbitrary great circles of the Bloch sphere. Our work shows that SLMs can be used to measure arbitrary spatial states with a fidelity sufficient for appropriate quantum information processing systems.

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• Item metadata

  Item type:	Article
  ID code:	26770
  Dates:	Date Event 30 April 2010 Published
  Subjects:	Science > Physics
  Department:	Faculty of Science > Physics
  Depositing user:	Users 1261 not found.
  Date deposited:	17 Aug 2010 10:18
  Last modified:	08 Apr 2024 18:39
  Related URLs:	Scopus publication Publisher
  URI:	https://strathprints.strath.ac.uk/id/eprint/26770