Systematic classification of fluxes in the 2^6 and 1^9 Landau–Ginzburg orientifolds

Classify all supersymmetric imaginary self-dual three-form flux configurations consistent with the D3-brane tadpole cancellation bound in the type IIB Landau–Ginzburg 2^6 orientifold model (with N_flux ≤ 40), and complete the analogous classification for the 1^9 model (with N_flux ≤ 12), thereby producing an exhaustive dataset of resulting four-dimensional N=1 Minkowski vacua in these backgrounds.

Background

The proceedings focus on non-geometric type IIB compactifications with exact worldsheet descriptions, specifically the 19 and 26 Landau–Ginzburg orientifold models that are mirrors of rigid Calabi–Yau threefolds and thus have no Kähler moduli. These models offer sharp tests for flux stabilization and swampland conjectures under small tadpole bounds.

The author notes that the 19 model is close to a regime where all allowed fluxes with small tadpole are understood, while the 26 model is more complex but may admit a broader scan or near-complete classification. Achieving a systematic classification would move from example-based evidence to exhaustive datasets, strengthening conclusions about stabilization efficiency and conjecture tests.

References

Despite the recent progress, several questions remain open. The first is systematic classification. The $19$ model is already close to a setting in which all allowed fluxes with small tadpole can be understood explicitly . The $26$ model is more complicated, but the recent results suggest that a broader scan or perhaps even a near-complete classification may be feasible there as well.

AI usage in string theory, a case study: String Vacua in the Interior of Moduli Space  (2604.01384 - Wrase, 1 Apr 2026) in Section 8 (Open questions and outlook)