M   GENOVESE*, G BRIDA, C NOVERO and  E PREDAZZI⁺

Istituto Elettrotecnico Nazionale Galileo Ferraris, Str. delle Cacce 91, I-10135 Torino, Italy

⁺ Dip. Fisica Teorica Univ. Torino e INFN, via P.Giuria 1, I-10125 Torino, Italy

* Email: genovese@ien.it

Abstract.

We describe the realisation of a new test of Bell inequalities using a new scheme obtained by the superposition of type I parametric down conversion produced in two different non-linear crystals pumped by the same laser, but with different polarisations. This experiment is the first test of Bell inequalities using a non-maximally entangled state and thus represents an important step in the direction of eliminating the detection loophole.

Keywords: Bell inequalities; non-locality; EPR.

Pacs No. 03.65.Bz