Nflation: observable predictions from the random matrix mass spectrum

Abstract

We carry out numerical investigations of the perturbations in Nflation models where the mass spectrum is generated by random matrix theory. The tensor-to-scalar ratio and non-gaussianity are already known to take the single-field values, and so the density perturbation spectral index is the main parameter of interest. We study several types of random field initial conditions, and compute the spectral index as a function of mass spectrum parameters. Comparison with microwave anisotropy data from the Wilkinson Microwave Anisotropy Probe shows that the model is currently viable in the majority of its parameter space.

5 pages RevTeX with 4 figures. Minor corrections to match version to appear in Physical Review D

References in corpus (6)

• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• Non-Gaussianities in two-field inflation
• Nflation: multi-field inflationary dynamics and perturbations
• Nflation: non-gaussianity in the horizon-crossing approximation
• On Perturbation Spectra of N-flation
• End of multi-field inflation and the perturbation spectrum

Cited by in corpus (5)

• Energy Transfer in Multi Field Inflation and Cosmological Perturbations
• MultiModeCode: An efficient numerical solver for multifield inflation
• Gravitational wave consistency relations for multifield inflation
• DBI N-flation
• Spectrum of Curvature Perturbation of Multi-field Inflation with Small-Field Potential