Cosmological perturbations and noncommutative tachyon inflation

Abstract

The motivation for studying the rolling tachyon and non-commutative inflation comes from string theory. In the tachyon inflation scenario, metric perturbations are created by tachyon field fluctuations during inflation. We drive the exact mode equation for scalar perturbation of the metric and investigate the cosmological perturbations in the commutative and non-commutative inflationary spacetime driven by the tachyon field which have a Born-Infeld Lagrangian.

6 two-column pages, no figure

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Cited by in corpus (22)

• Inflationary universe in loop quantum cosmology
• Tachyon Field in Intermediate Inflation
• Noncommutative Conformally Coupled Scalar Field Cosmology and its Commutative Counterpart
• A Note on Curvature Fluctuation of Noncommutative Inflation
• Preventing eternality in phantom inflation
• Constraining non-minimally coupled tachyon fields by Noether symmetry
• Gravitational Collapse of a Homogeneous Scalar Field in Deformed Phase Space
• Cosmological model with fermion and tachyon fields interacting via Yukawa-type potential
• A Note on Noncommutative Brane Inflation
• Generalized Space-time Noncommutative Inflation
• Brane tachyon dynamics
• Noncommutative KKLMMT Model
• Closed inflationary universe with tachyonic field
• Field independent cosmic evolution
• Flow equations in generalized braneworld scenarios
• Complete noncommutativity in a cosmological model with radiation
• Duality linking standard and tachyon scalar field cosmologies
• Slow-roll reconstruction for running spectral index
• K-Inflation in Noncommutative Space-Time
• Chaplygin Gas of Tachyon Nature Imposed by Symmetry and Constrained via H(z) Data
• Particle Motion Around Tachyon Monopole
• Tachyonic Universes in Patch Cosmologies with $\Omega >1$