Minimal simple de Sitter solutions

Solutions of Minimal Four Dimensional de Sitter Supergravity

Pseudo-supersymmetric solutions of minimal N = 2, D = 4 de Sitter supergravity are classified using spinorial geometry techniques. We find two classes of solutions, the first is the cosmological Majumdar-Papapetrou solution of Kastor and Traschen, and the second corresponds to gravitational waves propagating in the Nariai cosmology.

ترمودینامیک سیاهچاله‌های چرخان و گرانش با تصحیحات مرتبه اول نظریه ریسمان

  In this paper, the rotating black brane solutions with zero curvature horizon of classical gravity with first order string corrections are introduced. Although these solutions are not asymptotically anti de Sitter, one can use the counterterm method in order to compute the conserved quantities of these solutions. Here, by reviewing the counterterm method for asymptotically anti de Sitter spac...

Towards Classical de Sitter Solutions in String Theory

We investigate the type II string effective potential at tree-level and derive necessary ingredients for having de Sitter solutions in orientifold models with fluxes. Furthermore, we examine some explicit O6 compactifications in IIA theory on manifolds with SU(3)-structure in the limit where the orientifold sources are smeared. In particular, we use a simple ten-dimensional Ansatz for four-dime...

Cohomogeneity One Anti De Sitter Space H_1^3

سیاه‌چاله‌های نظریه گوس- بونه در حضور شاره کامل

In this paper, the solutions of the Gauss-Bonnet theory of gravity was proposed in the presence of a perfect fluid with thermodynamic pressure P and energy gravity ρ in n-dimension. Accordingly, perfect fluid tensor was regarded as energy-momentum tensor and the static and radiating solutions for the linear equation of state p = wρ was calculated. This solution contains all the solutions alread...