
TL;DR
This paper unifies five ten-dimensional matrix superstring theories within a single framework, revealing their IR fixed points, dual supergravity descriptions, and the emergence of extra dimensions in a holographic context.
Contribution
It provides a unified matrix theory framework for all five superstring theories, including new insights into their IR fixed points and dual supergravity descriptions.
Findings
All theories fit into a common matrix framework.
IR fixed points are characterized by orbifold conformal field theories.
Dual supergravity descriptions involve AdS spaces and extra dimensions.
Abstract
We study the origins of the five ten-dimensional ``matrix superstring'' theories, supplementing old results with new ones, and find that they all fit into a unified framework. In all cases the matrix definition of the string in the limit of vanishingly small coupling is a trivial 1+1 dimensional infra-red fixed point (an orbifold conformal field theory) characterized uniquely by matrix versions of the appropriate Green-Schwarz action. The Fock space of the matrix string is built out of winding T-dual strings. There is an associated dual supergravity description in terms of the near horizon geometry of the fundamental string solution of those T-dual strings. The singularity at their core is related to the orbifold target space in the matrix theory. At intermediate coupling, for the IIB and SO(32) systems, the matrix string description is in terms of non-trivial 2+1 dimensional fixed…
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