Photonic quantum walks with four-dimensional coins

  title={Photonic quantum walks with four-dimensional coins},
  author={Lennart Lorz and Evan Meyer-Scott and Thomas Nitsche and V{\'a}clav Poto{\vc}ek and Aur'el G'abris and Sonja Barkhofen and Igor Jex and Christine Silberhorn},
  journal={Physical Review Research},
The dimensionality of the internal coin space of discrete-time quantum walks has a strong impact on the complexity and richness of the dynamics of quantum walkers. While two-dimensional coin operators have successfully been used for defining dynamics on complex graphs, higher dimensional coins are necessary to unleash the full potential of discrete-time quantum walks. In this work we present an experimental realisation of a discrete-time quantum walk on a line graph, that instead of a two… Expand
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