Duality and axionic weak gravity

Stefano Andriolo, Tzu Chen Huang, Toshifumi Noumi, Hirosi Ooguri, Gary Shiu

Research output: Contribution to journalArticlepeer-review

25 Scopus citations


The axionic weak gravity conjecture predicts the existence of instantons whose actions are less than their charges in appropriate units. We show that the conjecture is satisfied for the axion-dilaton-gravity system if we assume duality constraints on the higher derivative corrections in addition to positivity bounds which follow from unitarity, analyticity, and locality of UV scattering amplitudes. On the other hand, the conjecture does not follow if we assume the positivity bounds only. This presents an example where derivation of the weak gravity conjecture requires more detailed UV information than the consistency of scattering amplitudes.

Original languageEnglish
Article number046008
JournalPhysical Review D
Issue number4
StatePublished - 15 Aug 2020
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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