Cosmological perturbations from multi-field inflation

Abstract

We briefly review the standard derivation of the spectra of cosmological perturbations in the simplest models of inflation. We then consider models with several scalar fields, described by Lagrangians with an arbitrary dependence on the kinetic terms. We illustrate our general formalism with the case of multi-field DBI inflation.

Invited plenary talk at ICGC-07 (International Conference on Gravitation and Cosmology), 17-21 December 2007, IUCAA, Pune, India; 10 pages, no figure

References in corpus (11)

• k-Inflation
• Perturbations in k-inflation
• DBI in the Sky
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• Perturbations in generalized multi-field inflation
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• Conserved non-linear quantities in cosmology
• Evolution of non-linear cosmological perturbations
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• Distinguishing cosmological models through quantum signatures of primordial perturbations
• Entropy Perturbations in N-flation
• Gravitational waves from two scalar fields unifying the dark sector with inflation
• CMB lensing forecasts for constraining the primordial perturbations: adding to the CMB temperature and polarization information
• Testing a Two Field Inflation Beyond the Slow-Roll Approximation
• Cosmological signatures of brane inflation