# Transitions of orbifold vacua

@article{Choi2019TransitionsOO, title={Transitions of orbifold vacua}, author={Kang-Sin Choi and Tatsuo C. Kobayashi}, journal={Journal of High Energy Physics}, year={2019}, volume={2019}, pages={1-33} }

A bstractWe study the global structure of vacua of heterotic strings compactified on orbifolds T4/ℤN (N = 2, 3) in the presence of heterotic 5-branes. Gauge symmetry breaking associated with orbifold is described by instantons in the field theory. There is phase transition between small (zero size limit) instantons and heterotic 5-branes. This mechanism provides top-down, stringy account to the spectrum and modular invariance condition of non-perturbative vacua with 5-branes. Also it takes us…

## 5 Citations

### Small-instanton transitions in F-theory

- PhysicsThe European Physical Journal Plus
- 2022

We study the phase transition between G-instantons and D3-branes quantitatively. A G-instanton is a classical solution to the self-dual equation of the M/F-theory three-form tensor field C in the…

### Index theorem on T2/ZN orbifolds

- MathematicsPhysical Review D
- 2021

We investigate chiral zero modes and winding numbers at fixed points on $T^2/\mathbb{Z}_N$ orbifolds. It is shown that the Atiyah-Singer index theorem for the chiral zero modes leads to a formula…

### Non-perturbative heterotic duals of M-theory on G2 orbifolds

- Physics, MathematicsJournal of High Energy Physics
- 2021

By fibering the duality between the E8 × E8 heterotic string on T3 and M-theory on K3, we study heterotic duals of M-theory compactified on G2 orbifolds of the form…

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