title: Wrapped branes as qubits.
abstract: Recent work has established a correspondence between the tripartite entanglement measure of three qubits and the macroscopic entropy of the four-dimensional 8-charge STU black hole of supergravity. Here we consider the configurations of intersecting D3-branes, whose wrapping around the six compact dimensions T6 provides the microscopic string-theoretic interpretation of the charges, and associate the three-qubit basis vectors |ABC>, (A, B, C=0 or 1) with the corresponding 8 wrapping cycles. In particular, we relate a well-known fact of quantum information theory, that the most general real three-qubit state can be parameterized by four real numbers and an angle, to a well-known fact of string theory, that the most general STU black hole can be described by four D3-branes intersecting at an angle.
authors.affiliation: The Blackett Laboratory, Imperial College London, Prince Consort Road, London SW7 2BZ, United Kingdom.
authors.forename: L
authors.initials: L
authors.lastname: Borsten
authors.forename: D
authors.initials: D
authors.lastname: Dahanayake
authors.forename: M J
authors.initials: MJ
authors.lastname: Duff
authors.forename: H
authors.initials: H
authors.lastname: Ebrahim
authors.forename: W
authors.initials: W
authors.lastname: Rubens