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Continuous variable tripartite entanglement and Einstein–Podolsky–Rosen correlations from triple nonlinearities

M K Olsen, A S Bradley and M D Reid

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We compare theoretically the tripartite entanglement available from the use of three concurrent χ(2) nonlinearities and three independent squeezed states mixed on beamsplitters, using an appropriate version of the van Loock–Furusawa inequalities. We also define three-mode generalizations of the Einstein–Podolsky–Rosen paradox which are an alternative for demonstrating the inseparability of the density matrix.


PACS

03.65.Ud Entanglement and quantum nonlocality (e.g. EPR paradox, Bell's inequalities, GHZ states, etc.)

42.65.Lm Parametric down conversion and production of entangled photons

42.50.Dv Quantum state engineering and measurements

Subjects

Optics, quantum optics and lasers

Quantum information and quantum mechanics

Dates

Issue 11 (14 June 2006)

Received 2 February 2006, in final form 2 March 2006

Published 15 May 2006



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