Multi-brid DBI Inflation

Abstract

It is shown that it is possible to apply $δ\cN$ to some special non-canonic cases. We extended the multi-brid idea to the multi-field separable model with a non-canonical kinetic term, mainly the DBI model. Assuming a specific surface for the end of inflation and introducing new fields, enable us to find an explicit expression for the number of e-folds in terms of the new fields. By using $\delta$N formalism, we arrived at the cosmological parameters. We considered the DBI model for two different limits, viz., speed limit and constant sound speed.

improved version

References in corpus (14)

• Planck 2018 results. IX. Constraints on primordial non-Gaussianity
• Multi-brid inflation and non-Gaussianity
• Large non-Gaussianity from multi-brid inflation
• δN formalism
• N-flation from multiple DBI type actions
• $\delta N$ formalism from superpotential and holography
• Separable and non-separable multi-field inflation and large non-Gaussianity
• DBI N-flation
• Local non-Gaussianity from rapidly varying sound speeds
• Fields Annihilation and Particles Creation in DBI inflation
• Dynamics of D3-D7 Brane Inflation in Throats
• Non-Gaussianities in multi-field DBI inflation with a waterfall phase transition
• Mixed non-Gaussianity in multiple-DBI inflation
• Towards multi-field D-brane inflation in a warped throat