We present an implementation scheme for a quantum walk in the orbital angular momentum space of a laser beam. The scheme makes use of a ring interferometer, containing a quarter-wave plate and a q plate. This setup enables one to perform an arbitrary number of quantum walk steps. In addition, the classical nature of the implementation scheme makes it possible to observe the quantum walk evolution in real time. We use nonquantum entanglement of the laser beam’s polarization with its orbital angular momentum to implement the quantum walk.
Reference:
Goyal, S.K, Roux, F.S, Forbes, A and Konrad, T. 2013. Implementing quantum walks using orbital angular momentum of classical light. Physical Review Letters, vol. 110, pp 263602(1)-263602(5)
Goyal, S., Roux, F., Forbes, A., & Konrad, T. (2013). Implementing quantum walks using orbital angular momentum of classical light. http://hdl.handle.net/10204/7476
Goyal, SK, FS Roux, A Forbes, and T Konrad "Implementing quantum walks using orbital angular momentum of classical light." (2013) http://hdl.handle.net/10204/7476
Goyal S, Roux F, Forbes A, Konrad T. Implementing quantum walks using orbital angular momentum of classical light. 2013; http://hdl.handle.net/10204/7476.
Copyright: American Physical Society. This is the post print version. The definitive version is published in Physical Review Letters, vol. 110, pp 263602(1)-263602(5)
