Enhancing coherent transport in a photonic network using controllable decoherence

Devon N. Biggerstaff, Rene Heilmann, Aidan A. Zecevik, Markus Graefe, Matthew A. Broome, Alessandro Fedrizzi, Stefan Nolte, Alexander Szameit, Andrew G. White, Ivan Kassal

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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.

Original languageEnglish
Article number11282
Number of pages6
JournalNature Communications
Volume7
DOIs
Publication statusPublished - 15 Apr 2016

Keywords

  • QUANTUM COHERENCE
  • LIGHT
  • TEMPERATURE
  • LATTICES

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