Inflation with a Negative Cosmological Constant

Abstract

We find a unique way of realizing inflation through cyclic phases in an universe with negative vacuum energy. According to the second law of thermodynamics entropy monotonically increases from cycle to cycle, typically by a constant factor. This means that the scale factor at the same energy density in consecutive cycles also increases by a constant factor. If the time period of the oscillations remain approximately constant then this leads to an ``over all'' exponential growth of the scale factor, mimicking inflation. A graceful exit from this inflationary phase is possible as a dynamical scalar field can take us from the negative to a positive energy vacuum during the last contracting phase.

replaced to match the journal version, title changed

References in corpus (67)

• de Sitter Vacua in String Theory
• The Standard Model Higgs boson as the inflaton
• Hierarchies from Fluxes in String Compactifications
• The Ekpyrotic Universe: Colliding Branes and the Origin of the Hot Big Bang
• Quantum Nature of the Big Bang: Improved dynamics
• Ghost Condensation and a Consistent Infrared Modification of Gravity
• Quantum Nature of the Big Bang
• Flux Compactification
• Cosmic Evolution in a Cyclic Universe
• Absence of Singularity in Loop Quantum Cosmology
• From Big Crunch to Big Bang
• A Cyclic Model of the Universe
• Bouncing Universes in String-inspired Gravity
• Elements of String Cosmology
• Standard Model Higgs boson mass from inflation
• Loop quantum cosmology of k=1 FRW models
• Gauge invariant MSSM inflaton
• Producing a Scale-Invariant Spectrum of Perturbations in a Hagedorn Phase of String Cosmology
• Bouncing Universe with Quintom Matter
• Bouncing Braneworlds
• Cosmologies with Energy Exchange
• MSSM flat direction inflation: slow roll, stability, fine tunning and reheating
• Cosmology With Negative Potentials
• String Gas Cosmology
• Designing Cyclic Universe Models
• On matching conditions for cosmological perturbations
• On the Construction of Nonsingular Pre-Big-Bang and Ekpyrotic Cosmologies and the Resulting Density Perturbations
• The primordial curvature perturbation in the ekpyrotic Universe
• Turnaround in Cyclic Cosmology
• On the Spectrum of Fluctuations in an Effective Field Theory of the Ekpyrotic Universe
• String Gas Cosmology and Structure Formation
• Spinors, Inflation, and Non-Singular Cyclic Cosmologies
• Non-perturbative Gravity, Hagedorn Bounce & CMB
• On Perturbations of Quintom Bounce
• Basic results in Vacuum Statistics
• Bouncing Universes with Varying Constants
• Perturbations in bouncing cosmologies: dynamical attractor vs scale invariance
• Cosmological structure problem of the ekpyrotic scenario
• Genericness of Big Bounce in isotropic loop quantum cosmology
• A-term inflation and the smallness of the neutrino masses
• Evolution of Metric Perturbations in Quintom Bounce model
• Inflation versus Cyclic Predictions for Spectral Tilt
• A-term inflation and the MSSM
• The failure of cosmological perturbation theory in the new ekpyrotic and cyclic ekpyrotic scenarios
• Unifying inflation and dark matter with neutrino masses
• Can Universe Experience Many Cycles with Different Vacua ?
• The Phantom Bounce: A New Oscillating Cosmology
• Interaction Rates in String Gas Cosmology
• Deflation at Turnaround for Oscillatory Cosmology
• Attraction towards an inflection point inflation
• More on the Spectrum of Perturbations in String Gas Cosmology
• The Ups and Downs of Cyclic Universes
• Cyclic Universes from General Collisionless Braneworld Models
• Recycling the universe using scalar fields
• Brane gases in the early universe: thermodynamics and cosmology
• The cosmological BCS mechanism and the Big Bang Singularity
• Probing the parameter space for an MSSM inflation and the neutralino dark matter
• Graceful exit from a stringy landscape via MSSM inflation
• Casimir energy and a cosmological bounce
• Cosmology and Cosmogony in a Cyclic Universe
• Entropy of Contracting Universe in Cyclic Cosmology
• String windings in the early universe
• Towards A Nonsingular Tachyonic Big Crunch
• String Gas Cosmology and Structure Formation - A Brief Review
• Emergence of Fluctuations from a Tachyonic Big Bang
• Large Radius Hagedorn Regime in String Gas Cosmology
• Open Strings on D-Branes and Hagedorn Regime in String Gas Cosmology

Cited by in corpus (32)

• Cosmic phase transitions: their applications and experimental signatures
• Towards a Resolution of the Cosmological Singularity in Non-local Higher Derivative Theories of Gravity
• Non-singular cosmology in a model of non-relativistic gravity
• Relaxing cosmological tensions with a sign switching cosmological constant
• Cosmological fluctuations of a random field and radiation fluid
• Multi-scale gravity and cosmology
• Cosmological Hysteresis and the Cyclic Universe
• Wiggles in the cosmic microwave background radiation: echoes from non-singular cyclic-inflation
• Cosmographic analysis of a closed bouncing universe with the varying cosmological constant in $f(R,T)$ gravity
• Cosmological perturbations from statistical thermal fluctuations
• Quantum backreaction in evolving FLRW spacetimes
• A Cyclic Universe With Varying Cosmological Constant in $f(R,T)$ gravity
• Design of a Cyclic Multiverse
• Amplification of Curvature Perturbations in Cyclic Cosmology
• Non-singular AdS-dS transitions in a landscape scenario
• Dark energy and inflation invoked in CCGG by locally contorted space-time
• Can the Big Bang Singularity be avoided by a single scalar field?
• Bouncing Anisotropic Universes with Varying Constants
• Scalar Perturbations Through Cycles
• Mapping Poincaré gauge cosmology to Horndeski theory for emergent dark energy
• Phase transitions during Cyclic-Inflation and Non-gaussianity
• Quantum gravity might restrict a cyclic evolution
• Perturbations in Bouncing and Cyclic Models, a General Study
• Are we seeing the beginnings of Inflation?
• Reconstruction of the equation of state for the cyclic universes in homogeneous and isotropic cosmology
• Dissipative Genesis of the Inflationary Universe
• Numerically Investigating the Emergent Cyclic Inflation Scenario
• Dissipative Emergence of Inflation from Quasi-Cyclic Universe
• AdS cycles in eternally inflating background
• Before the Bang
• Wormhole inducing inflation with Einstein Gauss Bonnet dilaton interaction
• Bouncing cosmologies in the presence of a Dirac-Born-Infeld field