36 citations · 53 across the 5 of their papers we have counts for
17 papers · 1 filter
Non-anticommutative solitons
Sergei V. Ketov, Olaf Lechtenfeld
Certain supersymmetric sigma models in 2+1 dimensions feature multi-soliton solutions, with and without scattering. We subject these systems to a non-anticommutative deformation by…
On the quartic curvature gravity in the context of FRW cosmology
M. Iihoshi, S. V. Ketov
We consider the purely gravitational fourth-order (in the spacetime curvature) quantum corrections to the Einstein-Hilbert gravity action, coming from superstrings in the leading o…
N=1/2 supergravity with matter in four Euclidean dimensions
Tomoya Hatanaka, Sergei V. Ketov
An N=1/2 supergravity in four Euclidean spacetime dimensions, coupled to both vector- and scalar-multiplet matter, is constructed for the first time. We begin with the standard (1,…
Conformally flat FRW metrics
Masao Iihoshi, Sergei V. Ketov, Atsushi Morishita
We find a new family of non-separable coordinate transformations bringing the FRW metrics into the manifestly conformally flat form. Our results are simple and complete, while our…
Nonperturbative low-energy effective action of the universal hypermultiplet
Sergei V. Ketov
The non-perturbative (D-instanton corrected) low-energy effective action of the universal hypermultiplet in the type-IIA string theory compactified on a Calabi-Yau threefold is cal…
D-instantons and universal hypermultiplet
Sergei V. Ketov
Quantum non-perturbative geometry of the universal hypermultiplet is investigated. We consider the simple case when the D-instantons, originating from the Calabi-Yau wrapped D2-bra…