Topological strings and large N phase transitions I: Nonchiral expansion of q-deformed Yang-Mills theory

Nicola Caporaso, Michele Cirafici, Luca Griguolo, Sara Pasquetti, Domenico Seminara, Richard J. Szabo

Research output: Contribution to journalArticle

Abstract

We examine the problem of counting bound states of BPS black holes on local Calabi-Yau threefolds which are fibrations over a Riemann surface by computing the partition function of q-deformed Yang-Mills theory on the Riemann surface. We study in detail the genus zero case and obtain, at finite N, the instanton expansion of the gauge theory. It can be written exactly as the partition function for U(N) Chern-Simons gauge theory on a Lens space, summed over all non-trivial vacua, plus a tower of non-perturbative instanton contributions. The correspondence between two and three dimensional gauge theories is elucidated by an explicit mapping between two-dimensional Yang-Mills instantons and flat connections on the Lens space. In the large N limit we find a peculiar phase structure in the model. At weak string coupling the theory reduces exactly to the trivial flat connection sector with instanton contributions exponentially suppressed, and the topological string partition function on the resolved conifold is reproduced in this regime. At a certain critical point all non-trivial vacua contribute, instantons are enhanced and the theory appears to undergo a phase transition into a strong coupling regime. We rederive these results by performing a saddle-point approximation to the exact partition function. We obtain a q-deformed version of the Douglas-Kazakov equation for two-dimensional Yang-Mills theory on the sphere, whose one-cut solution below the transition point reproduces the resolved conifold geometry. Above the critical point we propose a two-cut solution that should reproduce the chiral-antichiral dynamics found for black holes on the Calabi-Yau threefold and the Gross-Taylor string in the undeformed limit. The transition from the strong coupling phase to the weak coupling phase appears to be of third order. © SISSA 2006.

Original languageEnglish
Pages (from-to)797-863
Number of pages67
JournalJournal of High Energy Physics
Issue number1
DOIs
Publication statusPublished - 2006

Fingerprint

instantons
Yang-Mills theory
strings
partitions
expansion
gauge theory
critical point
lenses
chiral dynamics
towers
transition points
saddle points
counting
sectors
geometry
approximation

Keywords

  • Brane Dynamics in Gauge Theories
  • Field Theories in Lower Dimensions
  • Nonperturbative Effects
  • Topological Strings

Cite this

Caporaso, Nicola ; Cirafici, Michele ; Griguolo, Luca ; Pasquetti, Sara ; Seminara, Domenico ; Szabo, Richard J. / Topological strings and large N phase transitions I : Nonchiral expansion of q-deformed Yang-Mills theory. In: Journal of High Energy Physics. 2006 ; No. 1. pp. 797-863.
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abstract = "We examine the problem of counting bound states of BPS black holes on local Calabi-Yau threefolds which are fibrations over a Riemann surface by computing the partition function of q-deformed Yang-Mills theory on the Riemann surface. We study in detail the genus zero case and obtain, at finite N, the instanton expansion of the gauge theory. It can be written exactly as the partition function for U(N) Chern-Simons gauge theory on a Lens space, summed over all non-trivial vacua, plus a tower of non-perturbative instanton contributions. The correspondence between two and three dimensional gauge theories is elucidated by an explicit mapping between two-dimensional Yang-Mills instantons and flat connections on the Lens space. In the large N limit we find a peculiar phase structure in the model. At weak string coupling the theory reduces exactly to the trivial flat connection sector with instanton contributions exponentially suppressed, and the topological string partition function on the resolved conifold is reproduced in this regime. At a certain critical point all non-trivial vacua contribute, instantons are enhanced and the theory appears to undergo a phase transition into a strong coupling regime. We rederive these results by performing a saddle-point approximation to the exact partition function. We obtain a q-deformed version of the Douglas-Kazakov equation for two-dimensional Yang-Mills theory on the sphere, whose one-cut solution below the transition point reproduces the resolved conifold geometry. Above the critical point we propose a two-cut solution that should reproduce the chiral-antichiral dynamics found for black holes on the Calabi-Yau threefold and the Gross-Taylor string in the undeformed limit. The transition from the strong coupling phase to the weak coupling phase appears to be of third order. {\circledC} SISSA 2006.",
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Topological strings and large N phase transitions I : Nonchiral expansion of q-deformed Yang-Mills theory. / Caporaso, Nicola; Cirafici, Michele; Griguolo, Luca; Pasquetti, Sara; Seminara, Domenico; Szabo, Richard J.

In: Journal of High Energy Physics, No. 1, 2006, p. 797-863.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Topological strings and large N phase transitions I

T2 - Nonchiral expansion of q-deformed Yang-Mills theory

AU - Caporaso, Nicola

AU - Cirafici, Michele

AU - Griguolo, Luca

AU - Pasquetti, Sara

AU - Seminara, Domenico

AU - Szabo, Richard J.

PY - 2006

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AB - We examine the problem of counting bound states of BPS black holes on local Calabi-Yau threefolds which are fibrations over a Riemann surface by computing the partition function of q-deformed Yang-Mills theory on the Riemann surface. We study in detail the genus zero case and obtain, at finite N, the instanton expansion of the gauge theory. It can be written exactly as the partition function for U(N) Chern-Simons gauge theory on a Lens space, summed over all non-trivial vacua, plus a tower of non-perturbative instanton contributions. The correspondence between two and three dimensional gauge theories is elucidated by an explicit mapping between two-dimensional Yang-Mills instantons and flat connections on the Lens space. In the large N limit we find a peculiar phase structure in the model. At weak string coupling the theory reduces exactly to the trivial flat connection sector with instanton contributions exponentially suppressed, and the topological string partition function on the resolved conifold is reproduced in this regime. At a certain critical point all non-trivial vacua contribute, instantons are enhanced and the theory appears to undergo a phase transition into a strong coupling regime. We rederive these results by performing a saddle-point approximation to the exact partition function. We obtain a q-deformed version of the Douglas-Kazakov equation for two-dimensional Yang-Mills theory on the sphere, whose one-cut solution below the transition point reproduces the resolved conifold geometry. Above the critical point we propose a two-cut solution that should reproduce the chiral-antichiral dynamics found for black holes on the Calabi-Yau threefold and the Gross-Taylor string in the undeformed limit. The transition from the strong coupling phase to the weak coupling phase appears to be of third order. © SISSA 2006.

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KW - Field Theories in Lower Dimensions

KW - Nonperturbative Effects

KW - Topological Strings

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U2 - 10.1088/1126-6708/2006/01/035

DO - 10.1088/1126-6708/2006/01/035

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EP - 863

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

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