Inflaton Two-Point Correlation in the Presence of a Cosmic String

Abstract

Precise measurements of the microwave background anisotropy have confirmed the inflationary picture of approximately scale invariant, Gaussian primordial adiabatic density perturbations. However, there are some anomalies that suggest a small violation of rotational and/or translational invariance in the mechanism that generates the primordial density fluctuations. Motivated by this we study the two point correlation of a massless scalar (the inflaton) when the stress tensor contains the energy density from an infinitely long straight cosmic string in addition to a cosmological constant.

7 pages; references added

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Cited by in corpus (11)

• Ghost instabilities of cosmological models with vector fields nonminimally coupled to the curvature
• Anisotropic Inflation with Non-Abelian Gauge Kinetic Function
• Large scale CMB anomalies from thawing cosmic strings
• Quantum fluctuations in planar domain-wall space-times: A possible origin of primordial preferred direction
• Primordial inhomogeneities from massive defects during inflation
• Primordial anisotropies from cosmic strings during inflation
• Black Holes as Beads on Cosmic Strings
• Topological Defects from the Multiverse
• Inflaton fluctuations in the presence of cosmological defects
• Bubble nucleation and inflationary perturbations
• Primordial density fluctuations generated by wormholes