Engineering topics
Publications and source records attributed to Rubens, W.
We invoke the black-hole-qubit correspondence to derive the classification of four-qubit entanglement. The U-duality orbits resulting from timelike reduction of string theory from D=4 to D=3 yield 31 entanglement families, which reduce to nine up to permutation of the four qubits.
We provide a supersymmetric generalization of n quantum bits by extending the local operations and classical communication entanglement equivalence group [SU(2)]{sup n} to the supergroup [uOSp(1|2)]{sup n} and the stochastic local operations and classical communication equivalence group [SL(2,C)]{sup n} to the supergroup [OSp(1|2)]{sup n}. We introduce the appropriate supersymmetric generalizations of the conventional entanglement measures for the cases of n=2 and n=3. In particular, super-Greenberger-Horne-Zeilinger states are characterized by a nonvanishing superhyperdeterminant.