Cosmological Dynamics of the Tachyon with an Inverse Power-Law Potential

By L. Abramo, Fabio Finelli. 2003

171 citations recorded by the source corpus.

We investigate tachyon dynamics with an inverse power-law potential V (φ)∝φ−α. We find global attractors of the dynamics leading to a dust behavior for α > 2 and to an accellerating universe for 0 <α≤ 2. We study linear cosmological perturbations and we show that metric fluctuations are constant on large scales in both cases. In the presence of an additional perfect fluid, the tachyon with this potential behaves as dust or dark energy.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/7b445e229e90dfa62328057c6b24d1fd6a0206fa

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

1. A. Kamenshchik
2. V. Gorini
3. U. Moschella
4. V. Pasquier

In Nuclear and High Energy Physics

1. A. Kamenshchik
2. V. Gorini
3. U. Moschella
4. V. Pasquier

Citations in the corpus

• Tachyons, scalar fields, and cosmology (2003, background): “ng in the context of string theory [5, 6, 7] provides one example of matter which does the job. The tachyon has been intensively studied during the last few years also in application to cosmology [8]–[16]; in this case one usually takes Sen’s effective action [5] for granted and studies its cosmologi”