14207034
Melvin twists of global AdS5 × S5 and their non-commutative field theory dual
We consider the Melvin Twist of AdS5 × S5 under U(1) × U(1) isometry of the boundary S3 of the global AdS5 geometry and identify its field theory dual. We also study the thermodynamics of the Melvin deformed theory.
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Non-commutativity and open strings dynamics in Melvin universes
We compute the Moyal phase factor for open strings ending on D3-branes wrapping a NSNS Melvin universe in a decoupling limit explicitly using world sheet formalism in cylindrical coordinates.
2773865
Mass–spin relation for quark anti-quark bound states in non-commutative Yang–Mills theory
Abstract We investigate the relationship between mass and spin of quark anti-quark bound state in non-commutative gauge theory with N = 4 supersymmetry. In the large N and large 't Hooft coupling limit, these bound states correspond to rotating open strings ending on a D-brane embedded into the supergravity background dual of the non-commutative field theory. Although the physical configuration of the open strings are drastically deformed by the non-commutativity, we find that the relation between the energy and the angular momentum of the bound state is unaffected by the non-commutativity parameter. We also clarify the holographic interpretation of quark anti-quark potential in non-commutative gauge theories.
119223804
Power-law Solutions from Heterotic Strings
In this paper we search for accelerating power-law and ekpyrotic solutions in heterotic string theory with NS-NS fluxes compactified on half-flat and generalized half-flat manifolds. We restrict our searches to the STZ sector of the theory and include linear order $\alpha'$ corrections when looking for accelerating solutions. We find two ekpyrotic solutions in the case when the heterotic string theory is compactified on generalized half-flat manifolds. We do not find accelerating solutions in any of the models.
119200606
Natural inflation from near alignment in heterotic string theory
We propose a model for large field inflation in heterotic string theory. The construction applies the near alignment mechanism of Kim, Nilles, and Peloso. By including gaugino condensates and world-sheet instanton non-perturbative effects, we obtain a large effective axion decay constant.
27271627
Attractive holographic c-functions
A bstractUsing the attractor mechanism for extremal solutions in N=2$$ \mathcal{N}=2 $$ gauged supergravity, we construct a c-function that interpolates between the central charges of theories at ultraviolet and infrared conformal fixed points corresponding to anti-de Sitter geometries. The c-function we obtain is couched purely in terms of bulk quantities and connects two different dimensional CFTs at the stable conformal fixed points under the RG flow.