Classification of discrete modular symmetries in type IIB flux vacua

Tatsuo Kobayashi, Hajime Otsuka

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)


We classify discrete modular symmetries in the effective action of Type IIB string on toroidal orientifolds with three-form fluxes, emphasizing on T6/Z2 and T6/(Z2×Z2′) orientifold backgrounds. In the three-form flux background, the modular group is spontaneously broken down to its congruence subgroup whose pattern is severely constrained by a quantization of fluxes and tadpole cancellation conditions. We explicitly demonstrate that the congruence subgroups appearing in the effective action arise on magnetized D-branes wrapping certain cycles of tori.

Original languageEnglish
Article number106017
JournalPhysical Review D
Issue number10
Publication statusPublished - May 15 2020
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


Dive into the research topics of 'Classification of discrete modular symmetries in type IIB flux vacua'. Together they form a unique fingerprint.

Cite this