Well-Tempered Cosmology
arXiv:1812.05480 · doi:10.1088/1475-7516/2019/05/038
Abstract
We examine an approach to cosmology, known as Well-Tempering, that allows for a de Sitter phase whose expansion is independent of the cosmological constant. Starting from a generic scalar-tensor theory compatible with the recent gravitational wave observation, we impose the Well-Tempering conditions and derive a system that is capable of tuning away the cosmological constant within a sub-class of Horndeski theory, where the scalar has a canonical kinetic term and a general potential. This scenario improves upon the Fab-Four approach by allowing a standard fluid-cosmology before entering the de Sitter phase, and we present an explicit example of our general solution.
arXiv comment21 pages, 6 figures. Updated to include appendix, and match published version
References in corpus (34)
- GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
- Dynamics of dark energy
- Multi-messenger Observations of a Binary Neutron Star Merger
- Beyond the Cosmological Standard Model
- Generalized G-inflation: Inflation with the most general second-order field equations
- From k-essence to generalised Galileons
- Dark Energy after GW170817: dead ends and the road ahead
- Everything You Always Wanted To Know About The Cosmological Constant Problem (But Were Afraid To Ask)
- Strong constraints on cosmological gravity from GW170817 and GRB 170817A
- Dark Energy after GW170817 and GRB170817A
- Implications of the Neutron Star Merger GW170817 for Cosmological Scalar-Tensor Theories
- Reconstructing Dark Energy
- General second order scalar-tensor theory, self tuning, and the Fab Four
- Breaking a Dark Degeneracy with Gravitational Waves
- Challenges to Self-Acceleration in Modified Gravity from Gravitational Waves and Large-Scale Structure
- Scalar-tensor theories and modified gravity in the wake of GW170817
- Gravitational Rainbows: LIGO and Dark Energy at its Cutoff
- Speed of Gravitational Waves and the Fate of Scalar-Tensor Gravity
- Self-tuning and the derivation of the Fab Four
- Sequestering the Standard Model Vacuum Energy
- The Paths of Gravity in Galileon Cosmology
- Stability of a black hole and the speed of gravity waves within self-tuning cosmological models
- Vacuum Energy Sequestering: The Framework and Its Cosmological Consequences
- Dark energy after GW170817, revisited
- Cosmological self-tuning and local solutions in generalized Horndeski theories
- Purely Kinetic Coupled Gravity
- Fab 5: Noncanonical Kinetic Gravity, Self Tuning, and Cosmic Acceleration
- 'The End'
- The Well-Tempered Cosmological Constant
- How Fabulous Is Fab 5 Cosmology?
- Attracted to de Sitter: cosmology of the linear Horndeski models
- Superfluids and the Cosmological Constant Problem
- A Graceful Exit for the Cosmological Constant Damping Scenario
- Disformally self-tuning gravity
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- The Novel Probes Project -- Tests of Gravity on Astrophysical Scales
- Well-tempered teleparallel Horndeski cosmology: a teleparallel variation to the cosmological constant problem
- Well-Tempered Minkowski Solutions in Teleparallel Horndeski Theory
- A minimal self tuning model to solve the cosmological constant problem
- The Well-Tempered Cosmological Constant: The Horndeski Variations
- Tailoring cosmologies in cubic shift-symmetric Horndeski gravity
- The Well-Tempered Cosmological Constant: Fugue in B
- Hair-dressing Horndeski: an approach to hairy solutions in cubic Horndeski gravity
- Self-tuning kinetic gravity braiding: Cosmological dynamics, shift symmetry, and the tadpole
- Black holes in self-tuning cubic Horndeski cosmology
- Stealth black hole perturbations in kinetic gravity braiding
- Tadpole Cosmology: Self Tuning Without Degeneracy
- An Expansion of Well Tempered Gravity
- Fab-Four cosmography to tackle the Hubble tension
- Tadpole Cosmology: Milne Solution as a Cosmological Constant Hideout
- Robustness of the Cosmological Constant Damping Mechanism Through Matter Eras