Daniel Cavalcanti

When separated measurements on entangled quantum systems are performed, the theory predicts correlations that cannot be explained by any classical mechanism. All optical demonstrations of such violations have involved discrete degrees of freedom and are plagued by the detection-efficiency loophole. We present a simple method for generating large violations for feasible states using both photon counting and homodyne detections. Our scheme may lead to the first violation of Bell inequalities using continuous-variable measurements and pave the way for a loophole-free Bell test.