  This Master's thesis has two central subjects: the simulation of correlations
generated by local measurements on entangled quantum states by local
hidden-variables models and the revelation of hidden nonlocality. We present
and detail the Werner's local model and the hidden nonlocality of some Werner
states of dimension $d\geq5$, the Gisin-Degorre's local model for a Werner
state of dimension $d=2$ and the local model of Hirsch et al. for mixtures of
the singlet state and noise, all of them for projective measurements. Finally,
we introduce the local model for POVMs of Hirsch et al. for a state constructed
upon the singlet with noise, that still violates the CHSH inequality after
local filters are applied, hence presenting the so-called genuine hidden
nonlocality.
