Inflation with exotic kinetic terms in Einstein-Chern-Simons gravity

Abstract

An alternative scenario about the phenomenology of primordial Universe is k-inflation. According to this concept, inflation can be achieved by nonstandard kinetic term of scalar field, namely the inflaton. In this project we focus on k-essence models in the presence of a higher order and a linear kinetic term. Furthermore, the inflationary phenomenology with a Dirac-Born-Infeld scalar field is briefly examined, which arises from quantum theories of gravity such as superstring theory. Our approach about the inflationary era is that it can be described in the context of Einstein's gravity involving quantum corrections such as the Chern-Simons string inspired parity violating gravitational term. The equations of motion namely, the Friedmann equation, the Raychadhuri equation and the Klein-Gordon equation for an expanding background are extracted from the gravitational action utilizing the variational principle. The consequential system of differential equations with respect to Hubble's parameter and the inflaton field was quite perplexed in order to be solved with an analytic way. Therefore, the slow-roll conditions during inflationary era were imposed and terms with minor numerically contribution were neglected. From the overall phenomenological analysis it is proved that, models with exotic kinetic terms can generate viable results in consistency with the latest Planck data. Finally, the presence of Chern-Simons quantum corrections shifts the primordial spectral tensor index to blue. Even though blue gravitational waves have yet to be observed, if detected, compatibility with the aforementioned theory can be achieved.

arXiv commentAccepted in International Journal of Modern Physics A. arXiv admin note: text overlap with arXiv:2107.09457

References in corpus (56)

• Unified cosmic history in modified gravity: from F(R) theory to Lorentz non-invariant models
• Extended Theories of Gravity
• Modified Gravity Theories on a Nutshell: Inflation, Bounce and Late-time Evolution
• Planck 2018 results. X. Constraints on inflation
• k-Inflation
• The Effective Field Theory of Inflation
• Palatini Approach to Modified Gravity: f(R) Theories and Beyond
• Chern-Simons Modified General Relativity
• Classical evolution and quantum generation in generalized gravity theories including string corrections and tachyon: Unified analyses
• Running Non-Gaussianities in DBI Inflation
• Gravitational signature of Schwarzschild black holes in dynamical Chern-Simons gravity
• The effects of Chern-Simons gravity on bodies orbiting the Earth
• Primordial fluctuations and non-Gaussianities in multi-field DBI inflation
• Extreme- and Intermediate-Mass Ratio Inspirals in Dynamical Chern-Simons Modified Gravity
• Rotating black hole in extended Chern-Simons modified gravity
• Standard General Relativity from Chern-Simons Gravity
• Unification of Inflation with Dark Energy in $f(R)$ Gravity and Axion Dark Matter
• $f(R)$ Gravity Inflation with String-Corrected Axion Dark Matter
• Comparing Infrared Dirac-Born-Infeld Brane Inflation to Observations
• On the full trispectrum in single field DBI-inflation
• On the relation between 2+1 Einstein gravity and Chern Simons theory
• DBI Inflation in the Tip Region of a Warped Throat
• A k-essence Model Of Inflation, Dark Matter and Dark Energy
• Parity-violating gravity and GW170817
• Warp Features in DBI Inflation
• Gravitational Wave Constraints on DBI Inflation
• A note on the equivalence of a barotropic perfect fluid with a K-essence scalar field
• Polarized primordial gravitational waves in the ghost-free parity-violating gravity
• Dirac-Born-Infeld realization of sound speed resonance mechanism for primordial black holes
• Propagation of Gravitational Waves in Chern-Simons Axion Einstein Gravity
• $k$-essence $f(R)$ Gravity Inflation
• Gauss-Bonnet Inflation after Planck2018
• On Power Law Inflation in DBI Models
• A Consistency Relation for Power Law Inflation in DBI models
• DBI inflation with a non-minimally coupled Gauss-Bonnet term
• Initial Conditions for Non-Canonical Inflation
• Inflationary potentials in DBI models
• Intermediate inflation driven by DBI scalar field
• Beta-function formalism for k-essence constant-roll inflation
• Inflationary predictions in scalar-tensor DBI inflation
• Observational constraints on DBI constant-roll inflation
• de Sitter swampland bound in the Dirac-Born-Infeld inflation model
• The unification of inflation and late-time acceleration in the frame of $k$-essence
• DBI Inflation in N=1 Supergravity
• Enhanced Inflation in the Dirac-Born-Infeld framework
• Hair loss in parity violating gravity
• Inflation in DBI models with constant gamma
• The Phase Space of $k$-Essence $f(R)$ Gravity Theory
• Is Cosmology Compatible with Blue Gravity Waves ?
• Dirac-Born-Infeld warm inflation realization in the strong dissipation regime
• The Maxwell-Chern-Simons gravity and its cosmological implications
• Mimetic DBI Inflation in Confrontation with Planck2018 data
• Inflation with Gauss-Bonnet and Chern-Simons higher-curvature-corrections in the view of GW170817
• $k$-essence for warm inflation on the brane
• Frustration of resonant preheating by exotic kinetic terms
• Towards the unification of late-time acceleration and inflation by k-essence model

Cited by in corpus (2)

• Polarized primordial gravitational waves in spatial covariant gravities
• Polarized gravitational waves in the parity violating scalar-nonmetricity theory