Altepeter J B, Jeffrey E R, Kwiat P G, Tanzilli S, Gisin N, Acín A
Department of Physics, University of Illinois at Urbana-Champaign, Urbana, IL 61801-3080, USA.
Phys Rev Lett. 2005 Jul 15;95(3):033601. doi: 10.1103/PhysRevLett.95.033601.
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.