Computing parallel/coincident phase D-brane superpotentials and Type-Ⅱ/F -theory duality

  • In this paper we study the parallel phase and the coincident phase of D-brane systems with the compactification of one closed modulus. D-brane systems with two phases are described by different 4-folds in terms of Type-Ⅱ/F-theory duality, and the phase transitions are related by the blow-up from a 4-fold with singularities to a 4-fold without. In terms of gauge theory, the phase transition corresponds to the enhancement of gauge group U(1)×U(1)→ U(2) connecting the Coulomb branch and the Higgs branch. For the sextic and octic with two D-branes, using mirror symmetry and Type-Ⅱ/F theory duality, A-model superpotentials are obtained from the B-model side for the two phases, and the U(1) Ooguri-Vafa invariants for the parallel phase and U(2) Ooguri-Vafa invariants for the coincident phase are extracted from the A-model superpotential. The difference between the invariants of the two phases is evidence of the phase transition between the Coulomb branch and the Higgs branch.
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Xiao-Tian Jiang and Fu-Zhong Yang. Computing parallel/coincident phase D-brane superpotentials and Type-Ⅱ/F -theory duality[J]. Chinese Physics C, 2018, 42(9): 093104. doi: 10.1088/1674-1137/42/9/093104
Xiao-Tian Jiang and Fu-Zhong Yang. Computing parallel/coincident phase D-brane superpotentials and Type-Ⅱ/F -theory duality[J]. Chinese Physics C, 2018, 42(9): 093104.  doi: 10.1088/1674-1137/42/9/093104 shu
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Received: 2018-04-02
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    Supported by NSFC (11475178) and Y4JT01VJ01

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Computing parallel/coincident phase D-brane superpotentials and Type-Ⅱ/F -theory duality

    Corresponding author: Fu-Zhong Yang,
  • 1. University of Chinese Academy of Sciences, Beijing 100049, China
Fund Project:  Supported by NSFC (11475178) and Y4JT01VJ01

Abstract: In this paper we study the parallel phase and the coincident phase of D-brane systems with the compactification of one closed modulus. D-brane systems with two phases are described by different 4-folds in terms of Type-Ⅱ/F-theory duality, and the phase transitions are related by the blow-up from a 4-fold with singularities to a 4-fold without. In terms of gauge theory, the phase transition corresponds to the enhancement of gauge group U(1)×U(1)→ U(2) connecting the Coulomb branch and the Higgs branch. For the sextic and octic with two D-branes, using mirror symmetry and Type-Ⅱ/F theory duality, A-model superpotentials are obtained from the B-model side for the two phases, and the U(1) Ooguri-Vafa invariants for the parallel phase and U(2) Ooguri-Vafa invariants for the coincident phase are extracted from the A-model superpotential. The difference between the invariants of the two phases is evidence of the phase transition between the Coulomb branch and the Higgs branch.

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