2009/11/12 by C. V. S. Borges, M. Hor-Meyll, J. A. O. Huguenin +1
Physics and Astronomy · #quant-ph
paper · pdf · doi:10.1103/physreva.82.033833
published as Phys. Rev. A 82, 033833 (2010) · 4 pages, 2 figures
arxiv created 2009/11/12 · arxiv updated 2011/07/08
In analogy with Bell's inequality for two-qubit quantum states we propose an inequality criterion for the non-separability of the spin-orbit degrees of freedom of a classical laser beam. A definition of separable and non-separable spin-orbit modes is used in consonance with the one presented in Phys. Rev. Lett. 99, 160401 (2007). As the usual Bell's inequality can be violated for entangled two-qubit quantum states, we show both theoretically and experimentally that the proposed spin-orbit inequality criterion can be violated for non-separable modes. A discussion on the classical-quantum transition is also presented.