This is an old revision of the document!
A new paper co-authored by Marcelo Sarandy, Andreia Saguia and Fagner Paula of IF-UFF has just appeared in Physical Review Letters. In the paper, which is a theoretical/experimental collaboration with the groups of Nottingham, CBPF and São Carlos, a counter-intuitive behaviour of quantum correlations is demonstrated for the first time. Congratulations to all involved!