Three-observer Bell inequality violation on a two-qubit entangled state

Research paper by Matteo Schiavon, Luca Calderaro, Mirko Pittaluga, Giuseppe Vallone, Paolo Villoresi

Indexed on: 08 Nov '16Published on: 08 Nov '16Published in: arXiv - Quantum Physics


Bipartite Bell inequalities can be simultaneously violated by two different pairs of observers when weak measurements and signaling is employed. Here we experimentally demonstrate the violation of two simultaneous CHSH inequalities by exploiting a two-photon polarization maximally entangled state. Our results demonstrate that large double violation is experimentally achievable. Our demonstration may have impact for Quantum Key Distribution or certification of Quantum Random Number generators based on weak measurements.