Work

Cosmological perturbations in a generalized gravity including tachyonic condensation

Year: 2002

Type: article

Abstract: We present unified ways of handling the cosmological perturbations in a class of gravity theory covered by a general action. This gravity includes our previous generalized $f(\ensuremath{\varphi},R)$ gravity and the gravity theory motivated by the tachyonic condensation. We present a general prescription to derive the power spectra generated from vacuum quantum fluctuations in the slow-roll inflation era. An application is made to a slow-roll inflation based on the tachyonic condensation with an exponential potential.

Source: Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields

DOI: 10.1103/physrevd.66.084009

Authors: Jai-chan Hwang, Hyerim Noh

Institutions: Kyungpook National University, Korea Astronomy and Space Science Institute

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funder: Korea Science and Engineering Foundation

OpenAlex ID: W2017912003

FWCI: 7.946

Cites: 40

Cited by: 164

Related to: 10