Photonic quantum walks with four-dimensional coins
Lennart Lorz, Evan Meyer-Scott, Thomas Nitsche, Václav Potoček, Aurél Gábris, Sonja Barkhofen, Igor Jex, Christine Silberhorn · Physical Review Research · 2019
The authors develop an experimental platform to realize walks with four-dimensional coins using a looped Michelson interferometer based on the time-multiplexing technique. They are able to show walks on nontrivial finite structures, such as circles and figure-eight graphs. This paves the way to experimental implementations of important applications, e.g. quantum search, graph problems, quantum transport and magnetic walks.