Effective Superpotentials of Type II D-brane/F-theory on Compact Complete Intersection Calabi-Yau Threefolds

TL;DR

This paper extends the GKZ-system method to compute effective superpotentials for D-branes on compact Complete Intersection Calabi-Yau threefolds, providing both on-shell and off-shell results and exploring quantum symmetries.

Contribution

It introduces an extended GKZ-system approach for calculating superpotentials on a broader class of Calabi-Yau manifolds with D-branes, including models with multiple deformation moduli.

Findings

Consistent on-shell superpotentials with previous results.

Computed off-shell superpotentials for several models.

Extracted Ooguri-Vafa invariants via mirror symmetry.

Abstract

In this paper, we extend the GKZ-system method to the more general case: compact Complete Intersection Calabi-Yau manifolds (CICY). For several one-deformation modulus compact CICYs with D-branes, the on-shell superpotentials in this paper from the extended GKZ-system method are exactly consistent with published results obtained from other methods. We further compute the off-shell superpotentials of these models. Then we obtain both the on-shell and off-shell superpotentials for sev- eral two-deformation moduli compact CICYs with D-branes by using the extended GKZ-system method. The discrete symmetrical groups, Z2, Z3 and Z4, of the holo- morphic curves wrapped by D-branes play the important roles in computing the superpotentials, in some sense, they are the quantum symmetries of these models. Furthermore, through the mirror symmetry, the Ooguri-Vafa invariants are extracted from the A-model instanton expansion.