Open/Closed String Duality for Topological Gravity with Matter

Details Open/Closed String Duality for Topological Gravity with Matter Open/Closed String Duality for Topological Gravity with Matter

2005-01-18

arxiv.org/abs/hep-th/0501141v1

JHEP 0505 (2005) 007

Physics

High Energy Physics

High Energy Physics - Theory

23 pages, 1 figure, harvmac

Scientific paper

10.1088/1126-6708/2005/05/007

The exact FZZT brane partition function for topological gravity with matter is computed using the dual two-matrix model. We show how the effective theory of open strings on a stack of FZZT branes is described by the generalized Kontsevich matrix integral, extending the earlier result for pure topological gravity. Using the well-known relation between the Kontsevich integral and a certain shift in the closed-string background, we conclude that these models exhibit open/closed string duality explicitly. Just as in pure topological gravity, the unphysical sheets of the classical FZZT moduli space are eliminated in the exact answer. Instead, they contribute small, nonperturbative corrections to the exact answer through Stokes' phenomenon.

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