Bell-like inequality for the spin-orbit separability of a laser beam

In analogy with Bell's inequality for two-qubit quantum states, we propose an inequality criterion for the nonseparability of the spin-orbit degrees of freedom of a laser beam. A definition of separable and nonseparable spin-orbit modes is used in consonance with the one presented in Phys. Rev....

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Bibliographic Details
Published in:Physical review. A, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2010-09, Vol.82 (3), Article 033833
Main Authors: Borges, C. V. S., Hor-Meyll, M., Huguenin, J. A. O., Khoury, A. Z.
Format: Article
Language:English
Subjects:
ANGULAR MOMENTUM
ATOMIC AND MOLECULAR PHYSICS
BEAMS
BELL THEOREM
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
DEGREES OF FREEDOM
ELECTROMAGNETIC RADIATION
INFORMATION
LASER RADIATION
ORBITS
PARTICLE PROPERTIES
PHOTON BEAMS
QUANTUM ENTANGLEMENT
QUANTUM INFORMATION
QUANTUM STATES
QUBITS
RADIATIONS
SPIN
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Summary:In analogy with Bell's inequality for two-qubit quantum states, we propose an inequality criterion for the nonseparability of the spin-orbit degrees of freedom of a laser beam. A definition of separable and nonseparable 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 nonseparable modes. The inequality is discussed in both the classical and quantum domains.
ISSN:1050-2947
1094-1622
DOI:10.1103/PhysRevA.82.033833