Brany Liouville inflation
@article{Ellis2004BranyLI, title={Brany Liouville inflation}, author={John Ellis and Nikolaos E. Mavromatos and Dimitri V. Nanopoulos and Alexander S. Sakharov}, journal={New Journal of Physics}, year={2004}, volume={6}, pages={171 - 171} }
We present a specific model for cosmological inflation driven by the Liouville field in a non-critical supersymmetric string framework, in which the departure from criticality is due to open strings stretched between two moving Type-II 5-branes. We use WMAP and other data on fluctuations in the cosmic microwave background to fix the parameters of the model, such as the relative separation and velocity of the 5-branes, respecting also the constraints imposed by data on light propagation from…
26 Citations
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References
SHOWING 1-10 OF 136 REFERENCES
A STRING SCENARIO FOR INFLATIONARY COSMOLOGY
- Physics
- 1995
We describe a scenario for inflation in the framework of noncritical string theory, which does not employ an inflaton field. There is an exponential expansion of the volume of the Universe, induced…
A Liouville String Approach to Microscopic Time and Cosmology
- Physics
- 1993
In the non-critical string framework that we have proposed recently, the time t is identified with a dynamical local renormalization group scale, the Liouville mode, and behaves as a statistical…
CLOSING THE UNIVERSE BY RELAXING THE COSMOLOGICAL CONSTANT
- Physics
- 1994
We consider a string-inspired no-scale SU(5) × U(1) supergravity model. In this model there is a negative contribution to the vacuum energy, which may be suitably canceled by a positive contribution…
COSMOLOGICAL EVOLUTION IN A TYPE-0 STRING THEORY
- Physics
- 2001
We study the cosmological evolution of a type-0 string theory by employing non-criticality, which may be induced by fluctuations of the D3 brane worlds. We check the consistency of the approach to in…
SUPER HEAVY DARK MATTER ANISOTROPIES FROM D-PARTICLES IN THE EARLY UNIVERSE
- Physics
- 2004
We discuss a way of producing anisotropies in the spectrum of superheavy dark matter, which are due to the distortion of the inflationary space–time induced by the recoil of D-particles upon their…
String theory and an accelerating universe
- Physics
- 2001
An accelerating Universe can be accommodated naturally within non-critical string theory, in which scattering is described by a superscattering matrix $ that does not factorize as a product of S -a…
The Ekpyrotic universe: Colliding branes and the origin of the hot big bang
- Physics
- 2001
We propose a cosmological scenario in which the hot big bang universe is produced by the collision of a brane in the bulk space with a bounding orbifold plane, beginning from an otherwise cold,…
D Branes from Liouville Strings
- Physics
- 1997
We develop quantization aspects of our Liouville approach to noncritical strings, proposing a path-integral formulation of a second quantization of string theory, that incorporates naturally the…