Relaxation of the Cosmological Constant
arXiv:1902.06793 · doi:10.1103/PhysRevD.100.015048
Abstract
We present a model that naturally tunes a large positive cosmological constant to a small cosmological constant. A slowly rolling scalar field decreases the cosmological constant to a small negative value, causing the universe to contract, thus reheating it. An expanding universe with a small positive cosmological constant can be obtained, respectively, by coupling this solution to any model of a cosmological bounce and coupling the scalar field to a sector that undergoes a technically natural phase transition at the meV scale. A robust prediction of this model is a rolling scalar field today with some coupling to the standard model. This can potentially be experimentally probed in a variety of cosmological and terrestrial experiments, such as probes of the equation of state of dark energy, birefringence in the cosmic microwave background and terrestrial tests of Lorentz violation.
arXiv comment13 pages, 3 figures
References in corpus (16)
- Cosmic Evolution in a Cyclic Universe
- Cosmological Relaxation of the Electroweak Scale
- A Cyclic Model of the Universe
- Starting the Universe: Stable Violation of the Null Energy Condition and Non-standard Cosmologies
- A Critical Review of Classical Bouncing Cosmologies
- Galilean Genesis: an alternative to inflation
- Naturally inflating on steep potentials through electromagnetic dissipation
- Basics of thermal field theory -- a tutorial on perturbative computations
- The Null Energy Condition and its violation
- A smooth bouncing cosmology with scale invariant spectrum
- Relaxation from particle production
- Physical Properties of Four Dimensional Superstring Gravity Black Hole Solutions
- Phantom without UV pathology
- Relaxing the Cosmological Constant: a Proof of Concept
- Born Again Universe
- The GAmmas from Nuclear Decays Hiding from Investigators (GANDHI) Experiment
Cited by in corpus (33)
- Sinks in the Landscape, Boltzmann Brains, and the Cosmological Constant Problem
- Thermal Friction as a Solution to the Hubble Tension
- Exploring the robustness of stellar cooling constraints on light particles
- On Anthropic Solutions of the Cosmological Constant Problem
- Storage Ring Probes of Dark Matter and Dark Energy
- Self-Organised Localisation
- Quantifying Scalar Field Dynamics with DESI 2024 Y1 BAO measurements
- Dark Energy Radiation
- Yoga Dark Energy: Natural Relaxation and Other Dark Implications of a Supersymmetric Gravity Sector
- Relaxing the Higgs mass and its vacuum energy by living at the top of the potential
- Thermal Friction as a Solution to the Hubble and Large-Scale Structure Tensions
- Microphysical manifestations of viscosity and consequences for anisotropies in the very early universe
- Clocking Out Superradiance Limits
- Dark photon dark matter from a rolling inflaton
- The Higgs field and early universe cosmology: a (brief) review
- Neutrino Interactions in the Late Universe
- Supersymmetry Breaking and the Cosmological Constant
- Small cosmological constant from a peculiar inflaton potential
- An Introduction to Effective Field Theories
- Scalars Gliding Through an Expanding Universe
- Searches for other vacua I: bubbles in our universe
- Thermal Perturbations from Cosmological Constant Relaxation
- Cosmological Constraints on Thermal Friction of Axion Dark Matter
- B-modes from Post-inflationary Gravitational Waves Sourced by Axionic Instabilities at Cosmic Reionization
- Pathfinder for a High Statistics Search for Missing Energy In Gamma Cascades
- Cosmological constant: relaxation vs multiverse
- Searching for New Interactions at Sub-micron Scale Using the Mossbauer Effect
- QCD, Flavor, and the de Sitter Swampland
- Probing Long-Range Forces Between Neutrinos with Cosmic Structures
- Exploring the vacuum structure of gravitationally induced neutrino masses
- Lectures on Naturalness, String Landscape and Multiverse
- Reheating after relaxation of large cosmological constant
- Dynamically generated tilt of isocurvature fluctuations