Constant roll inflation in multifield models
Merce Guerrero, Diego Rubiera-García, Diego Sáez-Chillón Gómez
Abstract
Constant roll inflation is analyzed in the presence of multiscalar fields which are assumed to be described by a constant roll rate each. The different cases are studied and the corresponding potentials are reconstructed. The exact solutions are obtained, which show a similar behavior to the single scalar field model. For one of the cases analyzed in the paper, the so-called adiabatic field also constantly roll(s) while entropy perturbations become null, while the second case may lead to nonadiabatic perturbations. Both cases can fit the Planck data well by assuming the appropriate values for the free parameters of the models.
Topics & Concepts
Adiabatic processPlanckConstant (computer programming)Inflation (cosmology)PhysicsScalar fieldField (mathematics)Entropy (arrow of time)Scalar (mathematics)Classical mechanicsStatistical physicsTheoretical physicsMathematicsThermodynamicsQuantum mechanicsGeometryComputer sciencePure mathematicsProgramming languageCosmology and Gravitation TheoriesSolar and Space Plasma DynamicsGalaxies: Formation, Evolution, Phenomena