The Einstein static universe in Scalar-Fluid theories

Abstract

A new Lagrangian framework has recently been proposed to describe interactions between relativistic perfect fluids and scalar fields. In this paper we investigate the Einstein static universe in this new class of theories, which have been named Scalar-Fluid theories. The stability of the static solutions to both homogeneous and inhomogeneous perturbations is analysed deriving the relevant cosmological perturbation equations at the linear order. We can find several configurations corresponding to an Einstein static universes which are stable against inhomogeneous perturbations, but unstable against homogeneous perturbations. This shows the possible applications of Scalar-Fluid theories to the inflationary emergent universe scenario.

16 pages, 4 figures

References in corpus (16)

• Stability of the Einstein static universe in modified Gauss-Bonnet gravity
• On phenomenological models of dark energy interacting with dark matter
• Interacting quintessence from a variational approach Part II: derivative couplings
• The Einstein static universe in Loop Quantum Cosmology
• Interacting quintessence from a variational approach Part I: algebraic couplings
• Dynamics of f(R)-cosmologies containing Einstein static models
• Scalar-Fluid theories: cosmological perturbations and large-scale structure
• The Existence of Einstein Static Universes and their Stability in Fourth order Theories of Gravity
• Einstein static universes are unstable in generic f(R) models
• Eleven spherically symmetric constant density solutions with cosmological constant
• The Einstein static universe with torsion and the sign problem of the cosmological constant
• On the Stability of Jordan-Brans-Dicke Static Universe
• Emergent scenario in the Einstein-Cartan theory
• Perfect fluid spheres with cosmological constant
• Transforming the Einstein static Universe into physically acceptable static fluid spheres
• Einstein static Universe in non-minimal kinetic coupled gravity

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• Stability of the Einstein static Universe in $f(R,T)$ gravity
• Scalar-Fluid interacting dark energy: cosmological dynamics beyond the exponential potential
• Stability Analysis of Einstein Universe in $f(\mathcal{G},T)$ Gravity
• Cosmological dynamics of scalar fields with kinetic corrections: Beyond the exponential potential
• Dark energy with a gradient coupling to the dark matter fluid: cosmological dynamics and structure formation
• Stability of the Einstein static universe in Eddington-inspired Born-Infeld theory
• Einstein static universe from GUP
• Stability of the Closed Einstein Universe in Energy-Momentum Squared Gravity
• Inhomogeneous Perturbations and Stability Analysis of the Einstein Static Universe in f(R,T) Gravity
• Stability of Einstein static universe in gravity theory with a non-minimal derivative coupling
• On the stability of Einstein static universe at background level in massive bigravity
• Lagrangian description of cosmic fluids: mapping dark energy into unified dark energy
• On-shell Lagrangian of an ideal gas
• Emergent Universe Scenario, Bouncing and Cyclic Universes in Degenerate Massive Gravity
• Extended Chameleons
• On the Stability of Einstein Universe in f(R,T,R_{μν}T^{μν}) Gravity
• Emergent scenario in mimetic gravity
• Lemaitre-Tolman-Bondi Static Universe in Rastall-like Gravity
• CMB power spectrum in the emergent universe with k-essence
• Einstein's Field Equations as a Fold Bifurcation
• Analytical approximations for primordial power spectra in a spatially closed emergent universe
• CMB power spectrum for emergent scenario and slow expansion in scalar-tensor theory of gravity
• Emergent universe: tensor perturbations within the CSL framework
• Emergent Cosmology in 4D Einstein Gauss Bonnet Theory of Gravity
• Emergent universe revisited through the CSL theory
• Stability of the Einstein Static Universe in Zero-Point Length Cosmology with Topological Defects