1211.1705 (Sandeep K Goyal et al.)

Implementing quantum walks using orbital angular momentum of classical
light    [PDF]

Sandeep K Goyal, Filippus S Roux, Andrew Forbes, Thomas Konrad

We present an implementation scheme for 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 non-quantum entanglement of the laser beam's polarization with its orbital angular momentum to implement the quantum walk.

View original: http://arxiv.org/abs/1211.1705