%0 Conference Paper %F Oral %T Non-perturbative effects in string theory compactifications %+ Laboratoire Charles Coulomb (L2C) %A Alexandrov, Sergey %F Invité %< sans comité de lecture %Z L2C:14-215 %B In Search of Fundamental Symmetries %C Saint-Petersburg, Russia %8 2014-12-02 %D 2014 %Z Physics [physics]/High Energy Physics - Theory [hep-th]Conference papers %X I'll review the current understanding of the low energy effective theory resulting from compactifications of Type II superstrings on Calabi-Yau manifolds. The effective action can be encoded into the metric on a moduli space which is known to receive quantum stringy corrections, both perturbative and non-perturbative. The description of instanton effects crucially relies on twistorial methods and points toward a deep relation to integrable structures. %G English %L hal-01101042 %U https://hal.science/hal-01101042 %~ CNRS %~ L2C %~ MIPS %~ UNIV-MONTPELLIER %~ UM-2015-2021