Experimental Detection of Entanglement with Polarized Photons
arXiv:quant-ph/0307003 · doi:10.1103/PhysRevLett.91.227901
Abstract
We report on the first experimental realization of the entanglement witness for polarization entangled photons. It represents a recently discovered significant quantum information protocol which is based on few local measurements. The present demonstration has been applied to the so-called Werner states, a family of ''mixed'' quantum states that include both entangled and non entangled states. These states have been generated by a novel high brilliance source of entanglement which allows to continuously tune the degree of mixedness.
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