89 citations · 506 across the 13 of their papers we have counts for
10 papers · 1 filter
On the topology of the hypermultiplet moduli space in type II/CY string vacua
Sergei Alexandrov, Daniel Persson, Boris Pioline
By analyzing qualitative aspects of NS5-brane instanton corrections, we determine the topology of the hypermultiplet moduli space M_H in Calabi-Yau compactifications of type II str…
Quantum mirror symmetry and twistors
Sergei Alexandrov, Frank Saueressig
Using the twistor approach to hypermultiplet moduli spaces, we derive the worldsheet, D(-1), and D1-instanton contributions to the generalized mirror map, relating Type IIA and Typ…
D-instantons and twistors
Sergei Alexandrov, Boris Pioline, Frank Saueressig +1
Finding the exact, quantum corrected metric on the hypermultiplet moduli space in Type II string compactifications on Calabi-Yau threefolds is an outstanding open problem. We addre…
Linear perturbations of Hyperkahler metrics
Sergei Alexandrov, Boris Pioline, Frank Saueressig +1
We study general linear perturbations of a class of 4d real-dimensional hyperkahler manifolds obtainable by the (generalized) Legendre transform method. Using twistor methods, we s…
Membrane and fivebrane instantons from quaternionic geometry
Sergei Alexandrov, Frank Saueressig, Stefan Vandoren
We determine the one-instanton corrections to the universal hypermultiplet moduli space coming both from Euclidean membranes and NS-fivebranes wrapping the cycles of a (rigid) Cala…
Time-dependent backgrounds of 2D string theory: Non-perturbative effects
Sergei Yu. Alexandrov, Ivan K. Kostov
We study the non-perturbative corrections (NPC) to the partition function of a compactified 2D string theory in a time-dependent background generated by a tachyon source. The sine-…