On the Black-Hole/Qubit Correspondence
  The entanglement classification of four qubits is related to the extremal black holes of the 4-dimensional STU model via a time-like reduction to three dimensions. This correspondence is generalised to the entanglement classification of a very special four-way entanglement of eight qubits and the black holes of the maximally supersymmetric N = 8 and exceptional magic N = 2 supergravity theories. 
L. Borsten, M.J. Duff, A. Marrani, W. Rubens
hep-th quant-ph