## 114 Citations

Accelerating cosmologies from compactification.

- Physics, MathematicsPhysical review letters
- 2003

A solution of the (4+n)-dimensional vacuum Einstein equations is found for which spacetime is compactified on an n-dimensional compact hyperbolic manifold (n> or =2) of time-varying volume to a flat…

A note on accelerating cosmologies from compactifications and S-branes

- Physics
- 2003

We give a simple interpretation of the recent solutions for cosmologies with a transient accelerating phase obtained from compactification in hyperbolic manifolds, or from S-brane solutions of…

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

- Physics
- 2006

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…

Hyperbolic space cosmologies

- Physics
- 2003

We present a systematic study of accelerating cosmologies obtained from M/string theory compactifications of hyperbolic spaces with time-varying volume. A set of vacuum solutions where the internal…

M/string theory, S-branes and the accelerating universe

- Physics
- 2003

Recently it was observed that the hyperbolic compactification of M/string theory related to S-branes may lead to a transient period of acceleration of the universe. We study time evolution of the…

A no-go theorem for accelerating cosmologies from M-theory compactifications

- Mathematics, Physics
- 2005

M-theory cosmologies from singular Calabi–Yau compactifications

- Physics
- 2004

We study five-dimensional Kasner cosmologies in a time-dependent Calabi–Yau compactification of M-theory undergoing a flop transition. The dynamics of the additional states, which become massless at…

Accelerating cosmologies from exponential potentials

- Physics
- 2004

An exponential potential of the form V ~ exp(−2c/Mp) arising from the hyperbolic or flux compactification of higher-dimensional theories is of interest for getting short periods of accelerated…

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 =…

## References

SHOWING 1-10 OF 41 REFERENCES

Accelerating cosmologies from compactification.

- Physics, MathematicsPhysical review letters
- 2003

A solution of the (4+n)-dimensional vacuum Einstein equations is found for which spacetime is compactified on an n-dimensional compact hyperbolic manifold (n> or =2) of time-varying volume to a flat…

A note on accelerating cosmologies from compactifications and S-branes

- Physics
- 2003

We give a simple interpretation of the recent solutions for cosmologies with a transient accelerating phase obtained from compactification in hyperbolic manifolds, or from S-brane solutions of…

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…

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…

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…

Supergravity description of field theories on curved manifolds and a no go theorem

- Mathematics
- 2000

In the first part of this paper we find supergravity solutions corresponding to branes on worldvolumes of the form Rd×Σ where Σ is a Riemann surface. These theories arise when we wrap branes on…

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(*.

Does the Tachyon Matter

- Physics
- 2002

Abstract We study time-dependent solutions of Einstein–Maxwell gravity in four dimensions coupled to tachyon matter—the Dirac–Born–Infeld Lagrangian that provides an effective description of a…

A New cosmological scenario in string theory

- Physics
- 2002

We consider new cosmological solutions with a collapsing, an intermediate and an expanding phase. The boundary between the expanding (collapsing) phase and the intermediate phase is seen by comoving…

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…