8 papers
S-Duality, SL(2,Z) Multiplets and Killing Spinors
P. M. Llatas, J. M. Sanchez de Santos
The S-duality transformations in type IIB string theory can be seen as local U(1) transformations in type IIB supergravity. We use this approach to construct the multiple…
On T-duality in dilatonic gravity
Pablo M. Llatas
Under the assumption of axial symmetry we introduce a map from dilatonic gravity to a string-like action. This map allows one to introduce, in a rather simple way, the equivalent o…
Electrically Charged Black-holes for the Heterotic String Compactified on a -Torus
Pablo M. Llatas
We show that the most general stationary electrically charged black-hole solutions of the heterotic string compactified on a (10-D)-torus (where D > 3) can be obtained by using the…
Generalized Mathai-Quillen Topological Sigma Models
Pablo M. Llatas
A simple field theoretical approach to Mathai-Quillen topological field theories of maps from an internal space to a target space is presented. As an example of ap…
``N=4: A Unifying Framework for 2d Topological Gravity, String Theory and Constrained Topological Sigma Model''
Pablo M. Llatas, Shibaji Roy, Jose M. Sanchez de Santos
It is shown that two dimensional (2d) topological gravity in the conformal gauge has a larger symmetry than has been hitherto recognized; in the formulation of Labastida, Pernici a…
String Theory as a Constrained Topological Sigma Model
Pablo M. Llatas, Shibaji Roy
It has been argued by Ishikawa and Kato that by making use of a specific bosonization, string theory can be regarded as a constrained topological sigma model. We generalize…