Noise correlations, entanglement, and Bell inequalities
In condensed matter physics, the interactions between the constituents of the system are typically known. The building blocks are mere electrons, protons and neutrons, their collective behavior has been shown to lead to a variety of astonishing phenomena. Classic examples of such quantum correlated systems are superconductivity [1], superfluidity [2] and the fractional quantum Hall effect (FQHE) [3]. In these instances, the departure from usual behavior is often symptomatic of the presence of a non trivial ground state: a ground state which cannot be described by a systematic application of perturbation theory on the noninteracting system.