Bell inequality is violated with transverse spatial variables of twin photons, through optical implementation of Fractional Fourier Transforms. A q-bit can be constructed and manipulated in the same way, with promising applications to quantum information.
© 2007 OSA
(070.0070) Fourier optics and signal processing : Fourier optics and signal processing
(070.2580) Fourier optics and signal processing : Paraxial wave optics
(270.0270) Quantum optics : Quantum optics
(270.1670) Quantum optics : Coherent optical effects
P. H. Souto-Ribeiro, D. S. Tasca, S. P. Walborn, M. P. de Almeida, C. H. Monken, and P. Pellat-Finet, "Violation of Bell Inequality with the Fractional Momentum of the Photon: A Step Towards a New Q-Bit," in Conference on Coherence and Quantum Optics, OSA Technical Digest (CD) (Optical Society of America, 2007), paper CMI19.
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