Out of the Swampland with Multifield Quintessence?
arXiv:2007.11011 · doi:10.1007/JHEP10(2020)035
Abstract
Multifield models with a curved field space have already been shown to be able to provide viable quintessence models for steep potentials that satisfy swampland bounds. The simplest dynamical systems of this type are obtained by coupling Einstein gravity to two scalar fields with a curved field space. In this paper we study the stability properties of the non-trivial fixed points of this dynamical system for a general functional dependence of the kinetic coupling function and the scalar potential. We find the existence of non-geodesic trajectories with a sharp turning rate in field space which can give rise to late-time cosmic acceleration with no need for flat potentials. In particular, we discuss the properties of the phase diagram of the system and the corresponding time evolution when varying the functional dependence of the kinetic coupling. Interestingly, upon properly tuning the initial conditions of the field values, we find trajectories that can describe the current state of the universe. This could represent a promising avenue to build viable quintessence models out of the swampland if they could be consistently embedded in explicit string constructions.
arXiv comment16 pages, 6 figures; typos corrected and references added
References in corpus (40)
- Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
- Cosmological parameters from SDSS and WMAP
- de Sitter Vacua in String Theory
- The Complete Light-curve Sample of Spectroscopically Confirmed Type Ia Supernovae from Pan-STARRS1 and Cosmological Constraints from The Combined Pantheon Sample
- A 2.4% Determination of the Local Value of the Hubble Constant
- String Axiverse
- Axions In String Theory
- Exponential potentials and cosmological scaling solutions
- Distance and de Sitter Conjectures on the Swampland
- On the Cosmological Implications of the String Swampland
- Cosmology from Maxima-1, Boomerang and COBE/DMR CMB Observations
- The type IIB string axiverse and its low-energy phenomenology
- Dynamical systems applied to cosmology: dark energy and modified gravity
- De Sitter Space and the Swampland
- Bounds on Slow Roll and the de Sitter Swampland
- What if string theory has no de Sitter vacua?
- The landscape, the swampland and the era of precision cosmology
- On the de Sitter swampland criterion
- de Sitter String Vacua from Kahler Uplifting
- Dark Radiation in LARGE Volume Models
- The string swampland constraints require multi-field inflation
- De Sitter vs Quintessence in String Theory
- Explicit de Sitter Flux Vacua for Global String Models with Chiral Matter
- De Sitter from T-branes
- Hyperinflation
- Axions as Quintessence in String Theory
- De Sitter String Vacua from Dilaton-dependent Non-perturbative Effects
- Where in the String Landscape is Quintessence
- Natural Quintessence in String Theory
- Scaling attractors in multi-field inflation
- F-theory and Dark Energy
- Of pNGB QuiNtessence
- Dark energy beyond quintessence: Constraints from the swampland
- A New Class of de Sitter Vacua in Type IIB Large Volume Compactifications
- Recurrent Acceleration in Dilaton-Axion Cosmology
- Accelerated Universes from type IIA Compactifications
- New accelerating solutions in late-time cosmology
- Late-time Cosmic Acceleration from Compactification
- Strongly Coupled Quintessence
- General Analysis of Dark Radiation in Sequestered String Models
Cited by in corpus (22)
- The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
- Dimensional Reduction and (Anti) de Sitter Bounds
- Quintessence and the Swampland: The parametrically controlled regime of moduli space
- Quintessence and the Swampland: The numerically controlled regime of moduli space
- Multi-field dark energy: cosmic acceleration on a steep potential
- Yoga Dark Energy: Natural Relaxation and Other Dark Implications of a Supersymmetric Gravity Sector
- The Multi-Field, Rapid-Turn Inflationary Solution
- Tachyonic de Sitter solutions of 10d type II supergravities
- Dark Energy from Inspiraling in Field Space
- To curve, or not to curve: Is curvature-assisted quintessence observationally viable?
- Cosmological dynamics of multifield dark energy
- -field cosmology in hyperbolic field space: stability and general solutions
- Dark energy with the help of interacting dark sectors
- Quintom fields from chiral anisotropic cosmology
- Dynamics of Inspiraling Dark Energy
- Asymptotic behavior of saxion-axion system in stringy quintessence model
- Hitchhiker's Guide to the Swampland: The Cosmologist's Handbook to the string-theoretical Swampland Programme
- Effect of Moduli Redefinitions on Fibre Inflation
- Implications of single field inflation in general cosmological scenarios on the nature of dark energy given the swampland conjectures
- Stringy multifield quintessence and the Swampland
- Anisotropic Spacetimes in Chiral Scalar Field Cosmology
- Towards a de Sitter quintom-like cosmology from a reduction of a 7-dimensional theory