Efficient Hidden-Variable Simulation of Measurements in Quantum   Experiments
  We prove that the results of a finite set of general quantum measurements on an arbitrary dimensional quantum system can be simulated using a polynomial (in measurements) number of hidden-variable states. In the limit of infinitely many measurements, our method gives models with the minimal number of hidden-variable states, which scales linearly with the number of measurements. These results can find applications in foundations of quantum theory, complexity studies and classical simulations of quantum systems. 
Borivoje Dakic, Milovan Suvakov, Tomasz Paterek, Caslav Brukner