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Chern-Simons Theory, Matrix Models, and Topological Strings$
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Marcos Mariño

Print publication date: 2005

Print ISBN-13: 9780198568490

Published to Oxford Scholarship Online: September 2007

DOI: 10.1093/acprof:oso/9780198568490.001.0001

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GEOMETRIC TRANSITIONS

GEOMETRIC TRANSITIONS

Chapter:
(p.143) 8 GEOMETRIC TRANSITIONS
Source:
Chern-Simons Theory, Matrix Models, and Topological Strings
Author(s):

Marcos Mariño

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780198568490.003.0008

Gopakumar and Vafa demonstrated in an important paper (1999) that there is a closed string theory leading to the resummations (2.179) and (2.181). The intuition behind the result of Gopakumar and Vafa is that open/closed string dualities are related to geometric transitions in the background geometry. Since Chern-Simons theory is an open topological string on the deformed conifold geometry with N topological D-branes wrapping the three-sphere, it is natural to conjecture that at large N the D-branes induce a conifold transition in the background geometry. This yields the resolved conifold and no D-branes. But in the absence of D-branes that enforce boundary conditions, a theory of closed topological strings remains. Following this reasoning, Gopakumar and Vafa conjectured that Chern-Simons theory on S3 is equivalent to closed topological string theory on the resolved conifold. This chapter analyzes geometric transitions for Chern-Simons theory and type-A topological strings as well as matrix models and type-B topological strings.

Keywords:   geometric transitions, type-A topological strings, type-B topological strings, conifold transitions, Wilson loops, toric manifolds, matrix models, N duality

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