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Paper   IPM / P / 8744
School of Physics
  Title:   Wrapped Branes as Qubits
1.  L. Borsten
2.  D. Dahanayake
3.  M.J. Duff
4.  W. Rubens
5.  H. Ebrahim
  Status:   Published
  Journal: Phys. Rev. Lett.
  Vol.:  100
  Year:  2008
  Pages:   251602
  Supported by:  IPM
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 T^6 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.

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