Wrapped branes as qubits

TL;DR

This paper explores the connection between three-qubit entanglement in quantum information theory and the entropy of certain black holes in supergravity, using intersecting D3-branes in string theory to provide a microscopic interpretation.

Contribution

It establishes a correspondence between three-qubit states and D3-brane configurations, linking quantum information concepts with string theory and black hole entropy.

Findings

Three-qubit states correspond to D3-brane wrapping cycles.

Black hole entropy relates to tripartite entanglement measures.

String theory configurations mirror quantum information structures.

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 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.