Inflation in Entropic Cosmology: Primordial Perturbations and non-Gaussianities

Abstract

We investigate thermal inflation in double-screen entropic cosmology. We find that its realization is general, resulting from the system evolution from non-equilibrium to equilibrium. Furthermore, going beyond the background evolution, we study the primordial curvature perturbations arising from the universe interior, as well as from the thermal fluctuations generated on the holographic screens. We show that the power spectrum is nearly scale-invariant with a red tilt, while the tensor-to-scalar ratio is in agreement with observations. Finally, we examine the non-Gaussianities of primordial curvature perturbations, and we find that a sizable value of the non-linearity parameter is possible due to holographic statistics on the outer screen.

10 pages, 3 figures, references added, accepted by PLB

References in corpus (25)

• Cosmological Constraints from the SDSS Luminous Red Galaxies
• Observational Signatures and Non-Gaussianities of General Single Field Inflation
• Primordial Non-Gaussianities from Inflation Models
• Detection of primordial non-Gaussianity (fNL) in the WMAP 3-year data at above 99.5% confidence
• Friedmann Equations from Entropic Force
• Non-minimally coupled canonical, phantom and quintom models of holographic dark energy
• Restoring Holographic Dark Energy in Brane Cosmology
• Non-Gaussianity in a Matter Bounce
• Non-gaussianity from the trispectrum in general single field inflation
• Non-Gaussianities from ekpyrotic collapse with multiple fields
• Primordial Non-Gaussianities of General Multiple Field Inflation
• Statistical Origin of Gravity
• Holographic Dark Energy in Braneworld Models with Moving Branes and the w=-1 Crossing
• Large Non-Gaussianity Implication for Curvaton Scenario
• Gravitational Wave Constraints on DBI Inflation
• Thermal Fluctuations and Bouncing Cosmologies
• N-flation from multiple DBI type actions
• Determining Cosmological Parameters with Latest Observational Data
• Scale-dependence of Non-Gaussianity in the Curvaton Model
• DBI-Curvaton
• Holography and the scale-invariance of density fluctuations
• A No-go Theorem Prohibiting Inflation in the Entropic Force Scenario
• Primordial Perturbations Spectra in a Holographic Phase
• Thermal non-Gaussianity in holographic cosmology
• Non-Gaussianity in Island Cosmology

Cited by in corpus (27)

• Dynamical vacuum energy in the expanding Universe confronted with observations: a dedicated study
• Correspondence of cosmology from non-extensive thermodynamics with fluids of generalized equation of state
• Non-adiabatic-like accelerated expansion of the late universe in entropic cosmology
• Entropic cosmology in a dissipative universe
• Holographic realization from inflation to reheating in generalized entropic cosmology
• Non-Gaussianities of Single Field Inflation with Non-minimal Coupling
• Thermodynamics of a Schwarzschild Black Hole in Phantom Cosmology with Entropy Corrections
• Entropic force approach in a noncommutative charged black hole and the equivalence principle
• Noncommutative Geometry Inspired Entropic Inflation
• The Effects of Minimal Length, Maximal Momentum and Minimal Momentum in Entropic Force
• Evolution of thermodynamic quantities on cosmological horizon in $\Lambda (t)$ model
• Horizon thermodynamics in holographic cosmological models with a power-law term
• Is gravity entropic force?
• Energy stored on a cosmological horizon and its thermodynamic fluctuations in holographic equipartition law
• Entropy production due to adiabatic particle creation in a holographic dissipative cosmology
• Entropic force between two horizons of dilaton black holes with a power-Maxwell field
• Horizon thermodynamics and cosmological equations: A holographic-like connection between thermostatistical quantities on a cosmological horizon and in the bulk
• Cosmological model based on both holographic-like connection and Padmanabhan's holographic equipartition law
• Thermodynamical features of Verlinde's approach for a non-commutative Schwarzschild-anti-deSitter black hole in a broad range of scales
• Holographic thermodynamic relation for dissipative and non-dissipative universes in a flat FLRW cosmology
• Phase transition and entropic force in Reissner-Nordström-de Sitter spacetime
• Cosmological scenario based on the first and second laws of thermodynamics: Thermodynamic constraints on a generalized cosmological model
• Generalized Brans-Dicke theory from Verlinde's entropic gravity
• Space-Time Entropy, Space of Singularities and Gravity Origin: A Case Study
• Inflation from a generalized exponential plateau: towards extra suppressed tensor-to-scalar ratios
• GUP-corrected $\Lambda$CDM cosmology
• Non-minimally coupled quintessential inflation