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Journal Article

Continuous Variable Entanglement and Squeezing of Orbital Angular Momentum States

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Leuchs,  G.
Leuchs Division, Max Planck Institute for the Science of Light, Max Planck Society;

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Andersen,  U. L.
Quantum Information Processing, Leuchs Division, Max Planck Institute for the Science of Light, Max Planck Society;

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Citation

Lassen, M., Leuchs, G., & Andersen, U. L. (2009). Continuous Variable Entanglement and Squeezing of Orbital Angular Momentum States. PHYSICAL REVIEW LETTERS, 102(16): 163602. doi:10.1103/PhysRevLett.102.163602.


Cite as: http://hdl.handle.net/11858/00-001M-0000-002D-6BE9-5
Abstract
We report the first experimental characterization of the first-order continuous variable orbital angular momentum states. Using a spatially nondegenerate optical parametric oscillator (OPO) we produce quadrature entanglement between the two first-order Laguerre-Gauss modes. The family of orbital angular momentum modes is mapped on an orbital Poincare sphere, where the mode's position on the sphere is spanned by the three orbital parameters. Using a nondegenerate OPO we produce squeezing of these parameters, and as an illustration, we reconstruct the "cigar-shaped" uncertainty volume on the orbital Poincare sphere.