%0 Journal Article %T Quantum mirror symmetry and twistors %+ Laboratoire de Physique Théorique et Astroparticules (LPTA) %A Alexandrov, Sergey %A Saueressig, Frank %< avec comité de lecture %Z 09-043 %@ 1126-6708 %J Journal of High Energy Physics %I Springer %V 09 %P 108 %8 2009-09-25 %D 2009 %Z 0906.3743 %R 10.1088/1126-6708/2009/09/108 %K String Duality %K Extended Supersymmetry %K Supersymmetric Effective Theories %K Differential and Algebraic Geometry %Z Physics [physics]/High Energy Physics - Theory [hep-th]Journal articles %X Using the twistor approach to hypermultiplet moduli spaces, we derive theworldsheet, D(-1), and D1-instanton contributions to the generalized mirrormap, relating Type IIA and Type IIB string theory compactified on genericmirror Calabi-Yau threefolds. For this purpose, we provide a novel descriptionof the twistor space underlying the Type IIB hypermultiplet moduli space wherethe SL(2,Z)-action is found to be free from quantum corrections. The extent towhich instanton effects may resolve the perturbative singularities of themoduli space metric is discussed. %G English %L hal-00398002 %U https://hal.science/hal-00398002 %~ IN2P3 %~ LPTA %~ CNRS %~ UNIV-MONTP2 %~ UNIV-MONTPELLIER %~ UM1-UM2