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arXiv · 1002.0638

Implementation of one-dimensional quantum walks on spin-orbital angular momentum space of photons

Pei Zhang·Bi-Heng Liu·Rui-Feng Liu·Hong-Rong Li·Fu-Li Li·Guang-Can Guo
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Abstract

Photons can carry spin angular momentum (SAM) and orbital angular momentum (OAM), which can be used to realize a qubit system and a high-dimension system respectively. This spin-orbital system is very suitable for implementing one-dimensional discrete-time quantum random walks. We propose a simple scheme of quantum walks on the spin-orbital angular momentum space of photons, where photons walk on the infinity OAM space controlled by their SAM. By employing the recent invention of an optical device, the so-called 'q-plate', our scheme is more simple and efficient than others because there is no Mach-Zehnder interferometer in the scheme.

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Pei Zhang, Bi-Heng Liu, Rui-Feng Liu, Hong-Rong Li, Fu-Li Li, Guang-Can Guo. 2010-02-03. Implementation of one-dimensional quantum walks on spin-orbital angular momentum space of photons. https://doi.org/10.1103/physreva.81.052322

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