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Phys Rev Lett. 2005 Jul 15;95(3):033601. Epub 2005 Jul 15.

Experimental methods for detecting entanglement.

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  • 1Department of Physics, University of Illinois at Urbana-Champaign, Urbana, IL 61801-3080, USA.


Here we present experimental realizations of two new entanglement detection methods: a three-measurement Bell inequality inequivalent to the Clauser-Horne-Shimony-Holt inequality and a nonlinear Bell-type inequality based on the negativity measure. In addition, we provide an experimental and theoretical comparison between these new methods and several techniques already in use: the traditional Clauser-Horne-Shimony-Holt inequality, the entanglement witness, and complete state tomography.

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