793 citations · 4.8k across the 47 of their papers we have counts for
47 papers
Gravitational analog of the Non-Abelian T-duality
Oleg Lunin, Parita Shah
Non-abelian T duality (NATD) is a symmetry of the worldsheet action that allows one to generate new solutions of string theory by performing algebraic transformations of known geom…
Double Field Theory and corrections: explicit examples
Oleg Lunin, Parita Shah
We construct several solutions of effective actions for string theories beyond the supergravity approximation utilizing the framework of the Double Field Theory (DFT). The DFT effe…
Geometries with twisted spheres and non-abelian T-dualities
Oleg Lunin, Parita Shah
Spectral flow in two-dimensional field theories is known to correspond to geometrical twisting between two circles in the gravity dual. We generalize this operation to the geometri…
Charged wormholes in higher dimensions
Rhucha Deshpande, Oleg Lunin
We construct regular solutions of Einstein's equations connecting two copies of the space. Our geometries approach in the interior, and topologically…
Black branes with cosmological constant
Rhucha Deshpande, Oleg Lunin
We study neutral black branes with flat and curved worldvolumes in the presence of a negative cosmological constant. We reduce the equations governing the dynamics of such objects…
Separation of variables in the WZW models
Oleg Lunin, Jia Tian
We consider dynamics of scalar and vector fields on gravitational backgrounds of the Wess-Zumino-Witten models. For SO(4) and its cosets, we demonstrate full separation of variable…