477 Citations
Gravitational Radiation of Rolling Tachyon
- Physics
- 2002
In this paper we compute the radiation of the massless closed string states due to the non-vanishing coupling to the rolling open string tachyon with co-dimensions larger than 2, and discuss the…
Closed string tachyon: inflation and cosmological collapse
- Physics
- 2013
Starting with a compactification of critical bosonic string theory on an internal space with constant curvature, we look for conditions upon which an assumed closed string tachyon potential drives an…
Remarks on Tachyon Driven Cosmology
- Physics
- 2005
We begin by reviewing the results on the decay of unstable D-branes in type II string theory, and the open–closed string duality proposal that arises from these studies. We then apply this proposal…
More on tachyon cosmology in de Sitter gravity
- Physics
- 2006
We aim to study rolling tachyon cosmological solutions in de Sitter gravity. The solutions are taken to be flat FRW type and these are not time-reversal symmetric. We find that cosmological constant…
Cosmology with decaying tachyon matter
- Physics
- 2005
We investigate the case of a homogeneous tachyon field coupled to gravity in a spatially flat Friedmann-Robertson-Walker spacetime.Assuming the field evolution to be exponentially decaying with time…
Cosmological tachyon from cubic string field theory
- Physics
- 2006
The classical dynamics of the tachyon scalar field of cubic string field theory is considered on a cosmological background. Starting from a nonlocal action with arbitrary tachyon potential, which…
Tachyonic fields in cosmology
- Physics
- 2013
The possibility of explanation of accelerated expansion of the Universe by tachyonic scalar fields which homogeneously fill the world is discussed. The dependences of potential and kinetic term on…
The Solution of Tachyon Inflation in Curved Universe
- Physics
- 2009
In this paper, we have considered the curved universe which is filled by tachyonic field. We have found the exact solutions for the field, pressure, density, and scale factor and some cosmological…
References
SHOWING 1-10 OF 19 REFERENCES
Rolling Tachyon
- Physics
- 2002
We discuss construction of classical time dependent solutions in open string (field) theory, describing the motion of the tachyon on unstable D-branes. Despite the fact that the string field theory…
Tachyon Matter
- Physics
- 2002
It is shown that classical decay of unstable D-branes in bosonic and superstring theories produces pressureless gas with non-zero energy density. The energy density is stored in the open string…
Fundamental strings in open string theory at the tachyonic vacuum
- Physics
- 2001
We show that the world-volume theory on a D-p-brane at the tachyonic vacuum has solitonic string solutions whose dynamics is governed by the Nambu–Goto action of a string moving in (25+1) dimensional…
String theory and hybrid inflation / acceleration
- Physics
- 2001
We find a description of hybrid inflation in (3+1)-dimensions using brane dynamics of Hanany-Witten type. P-term inflation/acceleration of the universe with the hybrid potential has a slow-roll de…
On the Cosmological Constant Problems and the Astronomical Evidence for a Homogeneous Energy Density with Negative Pressure
- Physics
- 2002
In this article the cosmological constant problems, as well as the astronomical evidence for a cosmologically significant homogeneous exotic energy density with negative pressure (quintessence), are…
Quintessence from M theory
- Physics
- 2001
The status of exponential scalar potentials in supergravity is reviewed, and updated. One version of N = 8 D = 4 supergravity with a positive exponential potential, obtainable from a…