Numerical Computations of Separability Probabilities
  We compute the probability that a bipartite quantum state is separable by Monte Carlo sampling. This is carried out for rebits, qubits and quaterbits. We sampled $5\times 10^{11}$ points for each of these three cases. The results strongly support conjectures for certain rational values of these probabilities that have been found by other methods. 
Jianjia Fei and Robert Joynt
quant-ph math-ph math.MP