# Space-like branes, accelerating cosmologies and the near `horizon' limit

@article{Roy2006SpacelikeBA, title={Space-like branes, accelerating cosmologies and the near `horizon' limit}, author={Shibaji Roy and Harvendra Singh}, journal={Journal of High Energy Physics}, year={2006}, volume={2006}, pages={024-024} }

It is known that there exist two different classes of time dependent solutions in the form of space-like (or S)-branes in the low energy M/string theory. Accelerating cosmologies are known to arise from S-branes in one class, but not in the other where the time-like holography in the dS/CFT type correspondence may be more transparent. We show how the accelerating cosmologies arise from S-branes in the other class. Although we do not get the de Sitter structure in the lowest order supergravity…

## 9 Citations

Alpha-prime corrections to space-like branes

- Mathematics
- 2007

Space-like branes or S-branes are certain class of time dependent solutions of M/string theories having isometries ISO(p+1) × SO(d−p−2,1), where d = 11,10 respectively and have singularities at t =…

Space-like Dp branes: accelerating cosmologies versus conformally de Sitter space-time

- Mathematics, Physics
- 2014

A bstractWe consider the space-like Dp brane solutions of type II string theories having isometries ISO(p + 1) × SO(8 − p, 1). These are asymptotically flat solutions or in other words, the metrics…

Towards integrability for AdS3/CFT2

- Physics
- 2014

In this thesis we consider certain supersymmetric string theories on curved backgrounds containing the three-dimensional anti-de Sitter space, AdS3. On the one hand, these are gravity theories in…

Anisotropic SD2 brane: accelerating cosmology and Kasner-like space-time from compactification

- Physics
- 2017

Starting from an anisotropic (in all directions including the time direction of the brane) non-SUSY D2 brane solution of type IIA string theory we construct an anisotropic space-like D2 brane (or SD2…

Gauge Theories with Time Dependent Couplings and their Cosmological Duals

- Physics
- 2009

We consider the N = 4 super Yang-Mills theory in flat 3 + 1-dimensional space-time with a time dependent coupling constant which vanishes at t = 0, like g 2 YM = t p . In an analogous quantum…

Slowly varying dilaton cosmologies and their field theory duals

- Physics
- 2009

We consider a deformation of the AdS{sub 5}xS{sup 5} solution of IIB supergravity obtained by taking the boundary value of the dilaton to be time dependent. The time dependence is taken to be slowly…

7D Randall-Sundrum cosmology, brane-bulk energy exchange, and holography

- Physics
- 2008

We discuss the cosmological implications and the holographic dual theory of the 7D Randall-Sundrum gravitational setup. Adding generic matter in the bulk on the 7D gravity side, we study the…

One-loop corrections to AdS5 × S5 superstring partition function via Pohlmeyer reduction

- Physics, Mathematics
- 2010

We discuss semiclassical expansions around a class of classical string configurations lying in AdS3 × S1 using the Pohlmeyer-reduced form of the AdS5 × S5 superstring theory. The Pohlmeyer reduction…

Pohlmeyer-reduced form of string theory in AdS5 × S5: semiclassical expansion

- Mathematics
- 2009

We consider the Pohlmeyer-reduced formulation of the AdS5 × S5 superstring. It is constructed by introducing new variables which are algebraically related to supercoset current components so that the…

## References

SHOWING 1-10 OF 65 REFERENCES

Supergravity S-Branes

- Physics, Mathematics
- 2002

We construct supergravity solutions corresponding to space-like branes in string theory. Our approach is to apply the usual solution generating techniques to an appropriate time-dependent solution of…

Eternally accelerating cosmologies from S-brane

- Physics
- 2006

We construct an eternally inflating spacelike brane world model. If the space dimension of the brane is three (SM2) or six (SM5) for M theory or four (SD3) for superstring theory, a time-dependent…

Accelerating cosmologies from spacelike branes.

- PhysicsPhysical review letters
- 2003

We point out that the recently proposed model of a flat four-dimensional universe with accelerated expansion in string or M theory is a special case of time-dependent solutions that the author found…

Space - like branes

- Physics
- 2002

Scalar field theories with appropriate potentials in Minkowski space can have time-dependent classical solutions containing topological defects which correspond to S-branes-i.e. branes all of whose…

FROM p-BRANES TO COSMOLOGY

- Physics, Mathematics
- 1999

We study the relationship between static p-brane solitons and cosmological solutions of string theory or M theory. We discuss two different ways in which extremal p-branes can be generalized to…

A Study of Accelerating Cosmologies from Superstring/M Theories

- Physics
- 2003

We study aspects of the accelerating cosmologies obtained from the compactification of the vacuum solution and S2-branes of superstring/M theories. The parameter dependence of the resulting expansion…

Static, non-SUSY p-branes in diverse dimensions

- Mathematics
- 2005

We give explicit constructions of static, non-supersymmetric p-brane (for p• di 4, where d is the space-time dimensionality and including p = i1 or D-instanton) solutions of type II supergravities in…

Time dependent supergravity solutions in arbitrary dimensions

- Mathematics
- 2003

By directly solving the equations of motion we obtain the time dependent solutions of supergravities with dilaton and a q-form field strength in arbitrary dimensions. The metrics are assumed to have…

Compact hyperbolic extra dimensions: branes, kaluza-klein modes, and cosmology

- PhysicsPhysical review letters
- 2000

It is shown that the spectrum of Kaluza-Klein modes is radically altered, which allows the early Universe to evolve normally up to substantial temperatures, and completely negates the astrophysical constraints on M(*.