Universal unitary gate for single-photon spinorbit four-dimensional states

Details Universal unitary gate for single-photon spinorbit four-dimensional states Universal unitary gate for single-photon spinorbit four-dimensional states

2009-06-22

arxiv.org/abs/0906.3989v2

Phys. Rev. A 80, 022326 (2009)

Physics

Quantum Physics

7 pages, 2 figures

Scientific paper

10.1103/PhysRevA.80.022326

The recently demonstrated possibility of entangling opposite values of the orbital angular momentum (OAM) of a photon with its spin enables the realization of nontrivial one-photon spinorbit four-dimensional states for quantum information purposes. Hitherto, however, an optical device able to perform arbitrary unitary transformations on such spinorbit photon states has not been proposed yet. In this work we show how to realize such a ``universal unitary gate'' device, based only on existing optical technology, and describe its operation. Besides the quantum information field, the proposed device may find applications wherever an efficient and convenient manipulation of the combined OAM and spin of light is required.

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