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Enhancing coherent transport in a photonic network using controllable decoherence

Author

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  • Devon N. Biggerstaff

    (Centre for Engineered Quantum Systems and Centre for Quantum Computation and Communication Technology, School of Mathematics and Physics, The University of Queensland)

  • René Heilmann

    (Institute of Applied Physics, Abbe Center of Photonics, Friedrich-Schiller Universität Jena)

  • Aidan A. Zecevik

    (Centre for Engineered Quantum Systems and Centre for Quantum Computation and Communication Technology, School of Mathematics and Physics, The University of Queensland)

  • Markus Gräfe

    (Institute of Applied Physics, Abbe Center of Photonics, Friedrich-Schiller Universität Jena)

  • Matthew A. Broome

    (Centre for Engineered Quantum Systems and Centre for Quantum Computation and Communication Technology, School of Mathematics and Physics, The University of Queensland
    Present address: Centre for Quantum Computation and Communication Technology, School of Physics, University of New South Wales, Sydney, New South Wales 2052, Australia.)

  • Alessandro Fedrizzi

    (Centre for Engineered Quantum Systems and Centre for Quantum Computation and Communication Technology, School of Mathematics and Physics, The University of Queensland
    Institute of Photonics and Quantum Sciences, Heriot-Watt University)

  • Stefan Nolte

    (Institute of Applied Physics, Abbe Center of Photonics, Friedrich-Schiller Universität Jena)

  • Alexander Szameit

    (Institute of Applied Physics, Abbe Center of Photonics, Friedrich-Schiller Universität Jena)

  • Andrew G. White

    (Centre for Engineered Quantum Systems and Centre for Quantum Computation and Communication Technology, School of Mathematics and Physics, The University of Queensland)

  • Ivan Kassal

    (Centre for Engineered Quantum Systems and Centre for Quantum Computation and Communication Technology, School of Mathematics and Physics, The University of Queensland)

Abstract

Transport phenomena on a quantum scale appear in a variety of systems, ranging from photosynthetic complexes to engineered quantum devices. It has been predicted that the efficiency of coherent transport can be enhanced through dynamic interaction between the system and a noisy environment. We report an experimental simulation of environment-assisted coherent transport, using an engineered network of laser-written waveguides, with relative energies and inter-waveguide couplings tailored to yield the desired Hamiltonian. Controllable-strength decoherence is simulated by broadening the bandwidth of the input illumination, yielding a significant increase in transport efficiency relative to the narrowband case. We show integrated optics to be suitable for simulating specific target Hamiltonians as well as open quantum systems with controllable loss and decoherence.

Suggested Citation

  • Devon N. Biggerstaff & René Heilmann & Aidan A. Zecevik & Markus Gräfe & Matthew A. Broome & Alessandro Fedrizzi & Stefan Nolte & Alexander Szameit & Andrew G. White & Ivan Kassal, 2016. "Enhancing coherent transport in a photonic network using controllable decoherence," Nature Communications, Nature, vol. 7(1), pages 1-6, September.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms11282
    DOI: 10.1038/ncomms11282
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