Four-qubit entanglement from string theory

Abstract

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.

4 pages, 1 figure, 2 tables, revtex; minor corrections, references added

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