### 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.

Language | English |
---|---|

Article number | 012334 |

Number of pages | 6 |

Journal | Physical Review A |

Volume | 86 |

Issue number | 1 |

DOIs | |

Publication status | Published - 27 Jul 2012 |

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### Keywords

- dimension
- high-dimensional
- two-photon
- orbital angular
- momentum entaglement

### Cite this

*Physical Review A*,

*86*(1), [012334]. https://doi.org/10.1103/PhysRevA.86.012334

}

*Physical Review A*, vol. 86, no. 1, 012334. https://doi.org/10.1103/PhysRevA.86.012334

**Increasing the dimension in high-dimensional two-photon orbital angular momentum entanglement.** / Romero, J.; Giovannini, D.; Franke-Arnold, S.; Barnett, S. M.; Padgett, M. J.

Research output: Contribution to journal › Article

TY - JOUR

T1 - Increasing the dimension in high-dimensional two-photon orbital angular momentum entanglement

AU - Romero, J.

AU - Giovannini, D.

AU - Franke-Arnold, S.

AU - Barnett, S. M.

AU - Padgett, M. J.

PY - 2012/7/27

Y1 - 2012/7/27

N2 - 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.

AB - 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.

KW - dimension

KW - high-dimensional

KW - two-photon

KW - orbital angular

KW - momentum entaglement

UR - http://www.scopus.com/inward/record.url?scp=84864441975&partnerID=8YFLogxK

U2 - 10.1103/PhysRevA.86.012334

DO - 10.1103/PhysRevA.86.012334

M3 - Article

VL - 86

JO - Physical Review A - Atomic, Molecular, and Optical Physics

T2 - Physical Review A - Atomic, Molecular, and Optical Physics

JF - Physical Review A - Atomic, Molecular, and Optical Physics

SN - 1050-2947

IS - 1

M1 - 012334

ER -