Abstract
We study the three-mode entanglement properties in a new kind of the coupled nonlinear optical interactions consisting of two parametric down-conversion processes and one up-conversion. Approach, based on partial scaling transformation of the covariant matrix, is used to reveal tripartite entanglement. It is established that the three-mode field is in the true entangled state.
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Chirkin, A.S., Saigin, M.Y. Tripartite entanglement in coupled three-wave interactions. Acta Phys. Hung. B 26, 63–70 (2006). https://doi.org/10.1556/APH.26.2006.1-2.9
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DOI: https://doi.org/10.1556/APH.26.2006.1-2.9