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Interface between path and orbital angular momentum entanglement for high-dimensional photonic quantum information

Author

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  • Robert Fickler

    (Vienna Center for Quantum Science and Technology, Faculty of Physics, University of Vienna
    Institute for Quantum Optics and Quantum Information, Austrian Academy of Sciences)

  • Radek Lapkiewicz

    (Vienna Center for Quantum Science and Technology, Faculty of Physics, University of Vienna
    Institute for Quantum Optics and Quantum Information, Austrian Academy of Sciences)

  • Marcus Huber

    (Fisica Teorica: Informacio i Fenomens Quantics, Departament de Fisica, Universitat Autonoma de Barcelona
    ICFO-Institut de Ciencies Fotoniques)

  • Martin P.J. Lavery

    (School of Physics and Astronomy, Scottish Universities Physics Alliance (SUPA), University of Glasgow)

  • Miles J. Padgett

    (School of Physics and Astronomy, Scottish Universities Physics Alliance (SUPA), University of Glasgow)

  • Anton Zeilinger

    (Vienna Center for Quantum Science and Technology, Faculty of Physics, University of Vienna
    Institute for Quantum Optics and Quantum Information, Austrian Academy of Sciences)

Abstract

Photonics has become a mature field of quantum information science, where integrated optical circuits offer a way to scale the complexity of the set-up as well as the dimensionality of the quantum state. On photonic chips, paths are the natural way to encode information. To distribute those high-dimensional quantum states over large distances, transverse spatial modes, like orbital angular momentum possessing Laguerre Gauss modes, are favourable as flying information carriers. Here we demonstrate a quantum interface between these two vibrant photonic fields. We create three-dimensional path entanglement between two photons in a nonlinear crystal and use a mode sorter as the quantum interface to transfer the entanglement to the orbital angular momentum degree of freedom. Thus our results show a flexible way to create high-dimensional spatial mode entanglement. Moreover, they pave the way to implement broad complex quantum networks where high-dimensionally entangled states could be distributed over distant photonic chips.

Suggested Citation

  • Robert Fickler & Radek Lapkiewicz & Marcus Huber & Martin P.J. Lavery & Miles J. Padgett & Anton Zeilinger, 2014. "Interface between path and orbital angular momentum entanglement for high-dimensional photonic quantum information," Nature Communications, Nature, vol. 5(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms5502
    DOI: 10.1038/ncomms5502
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    Cited by:

    1. Chenhao Li & Torsten Wieduwilt & Fedja J. Wendisch & Andrés Márquez & Leonardo de S. Menezes & Stefan A. Maier & Markus A. Schmidt & Haoran Ren, 2023. "Metafiber transforming arbitrarily structured light," Nature Communications, Nature, vol. 14(1), pages 1-10, December.

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