Qubits and STU Black Holes with Eight Electric and Magnetic Charges
  In this work, we consider a STU black-hole model containing eight magnetic and eight electric charges ((8+8)-signature). We show that such model admits an extremal black holes solution in which (8+8)-signature can be associated with the entropy via the Cayley's hyperdeterminant. 
Armando Meza Gaxiola, Juan Antonio Nieto Garcia and Edgar Alejandro   Leon Espinoza
gr-qc hep-th