Unified Dark Energy and Dark Matter from Dynamical Spacetime Cosmology

Abstract

A model of unified dark matter and dark energy based on a Dynamical Spacetime Theory (DST) is studied. By introducing a Dynamical Spacetime vector field ${\chi }_{\mu }$, a conservation of an energy momentum tensor $T_{(\chi )}^{\mu \nu }$ emerges. The action allows for two different potentials, while one represents a dark energy. For constant potentials, the cosmological solution yields a non singular bouncing solutions that rapidly approaches the $\Lambda$CDM model. The Dynamical Time corresponds to the cosmic time as well. The theory fits with the late time expansion data of the Universe. With higher dimensions a mechanism for inflation and compactification appears, with exponential growth for some dimensions and exponential contraction of the others. By demanding that the Dynamical Spacetime vector field be a gradient of a scalar the DST becomes a theory with diffusive interacting, which asymptotically returns to the $\Lambda$CDM model as a stable point. These formulations lead to scenarios which address our understanding about the origin of the Universe.

arXiv commentPhD Thesis

References in corpus (69)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Cosmological Imprint of an Energy Component with General Equation of State
• Final Results from the Hubble Space Telescope Key Project to Measure the Hubble Constant
• The Complete Light-curve Sample of Spectroscopically Confirmed Type Ia Supernovae from Pan-STARRS1 and Cosmological Constraints from The Combined Pantheon Sample
• Quintessence, Cosmic Coincidence, and the Cosmological Constant
• Generalized Chaplygin Gas, Accelerated Expansion and Dark Energy-Matter Unification
• A 2.4% Determination of the Local Value of the Hubble Constant
• Exponential potentials and cosmological scaling solutions
• Kinetically Driven Quintessence
• Dark Energy Survey Year 1 Results: Cosmological Constraints from Galaxy Clustering and Weak Lensing
• Dark Energy after GW170817: dead ends and the road ahead
• Cosmology with Ultra-light Pseudo-Nambu-Goldstone Bosons
• Everything You Always Wanted To Know About The Cosmological Constant Problem (But Were Afraid To Ask)
• Dark Energy after GW170817 and GRB170817A
• Quintessence arising from exponential potentials
• Structure formation with a self-tuning scalar field
• New Parallaxes of Galactic Cepheids from Spatially Scanning the Hubble Space Telescope: Implications for the Hubble Constant
• Non-minimal dark sector physics and cosmological tensions
• Dark Energy Survey Year 1 Results: Constraints on Extended Cosmological Models from Galaxy Clustering and Weak Lensing
• Modified teleparallel theories of gravity
• Challenges to Self-Acceleration in Modified Gravity from Gravitational Waves and Large-Scale Structure
• A Hubble Diagram for Quasars
• First evidence of running cosmic vacuum: challenging the concordance model
• Dynamical behavior in $f(T,T_G)$ cosmology
• Kinetic k-essence and Quintessence
• Quintessence: a mini-review
• Phase-space analysis of interacting phantom cosmology
• An improved model-independent assessment of the late-time cosmic expansion
• Lectures on the Cosmological Constant Problem
• On the cosmological constant problem
• Superluminous Supernovae from the Dark Energy Survey
• Dark Energy Survey Year 1 results: Detection of Intra-cluster Light at Redshift $\sim$ 0.25
• Dark Fluid: a complex scalar field to unify dark energy and dark matter
• Dynamical features of scalar-torsion theories
• Perturbation evolution in cosmologies with a decaying cosmological constant
• Dynamics of the anisotropic Kantowsky-Sachs geometries in $R^n$ gravity
• Can Conformally Coupled Modified Gravity Solve The Hubble Tension?
• Teleparallel quintessence with a nonminimal coupling to a boundary term
• Updated constraints on $f(T)$ models using direct and indirect measurements of the Hubble parameter
• A two measure model of dark energy and dark matter
• Unified dark energy and dark matter from a scalar field different from quintessence
• Observational constraints on thawing quintessence models
• Dark Energy Survey Year 1 Results: Constraining Baryonic Physics in the Universe
• Interacting Diffusive Unified Dark Energy and Dark Matter from Scalar Fields
• Constraining the Asymptotically Safe Cosmology: cosmic acceleration without dark energy
• Unification of DE-DM from Diffusive Cosmology
• Inflation from fermions with curvature-dependent mass
• Dynamics of the diffusive DM-DE interaction--dynamical system approach
• Cosmological models with fluid matter undergoing velocity diffusion
• Lorentzian Quintessential Inflation
• Quadratic curvature theories formulated as Covariant Canonical Gauge theories of Gravity
• Non-Canonical Volume-Form Formulation of Modified Gravity Theories and Cosmology
• Inflation Compactification from Dynamical space time
• Unified Dark Energy-Dark Matter model with Inverse Quintessence
• The Phase Space of $k$-Essence $f(R)$ Gravity Theory
• Large-scale structure in mimetic Horndeski gravity
• Gravitational Theory with a Dynamical Time
• Massive mimetic cosmology
• Canonical and phantom scalar fields as an interaction of two perfect fluids
• Linear potentials in galaxy halos by Asymmetric Wormholes
• Unification for the Darkly Charged Dark Matter
• A correspondence between $1^{st}$ and $2^{nd}$ order formalism by a metricity constraint
• Dynamically generated inflationary two-field potential via non-Riemannian volume forms
• The Local Group as a test system for Modified Newtonian Dynamics
• Low-Redshift Constraints on Covariant Canonical Gauge Theory of Gravity
• Energy transfer from space-time into matter and a bouncing inflation from Covariant Canonical Gauge theory of Gravity
• Tests of $\Lambda$CDM and Conformal Gravity using GRB and Quasars as Standard Candles out to $z\sim 8$
• Unified Dark Energy and Dark Matter from Dynamical Spacetime Cosmology
• Gauge theory of Gravity based on the correspondence between the $1^{st}$ and the $2^{nd}$ order formalisms

Cited by in corpus (3)

• Observational constraints on Starobinsky $f(R)$ cosmology from cosmic expansion and structure growth data
• Non-Canonical Volume-Form Formulation of Modified Gravity Theories and Cosmology
• Unified Dark Energy and Dark Matter from Dynamical Spacetime Cosmology