Multiple Lambda cosmology: dark fluid with time-dependent equation of state as classical analog of cosmological landscape

Abstract

We discuss FRW universe with time-dependent EoS dark fluid which leads to multiple de Sitter space. This model (as well as its scalar-tensor version) may be considered as some classical analog of cosmological landscape. The universe expansion history may look as transitions between different deSitter eras what suggests the interesting solution for cosmological constant problem. For specific time-dependent EoS dark fluid the possibility of transitions between universe regions with positive and negative cosmological constant is also established.

LaTeX file, 8 pages, no figure, version to appear in PLB

References in corpus (20)

• Cosmological Constant - the Weight of the Vacuum
• Modified gravity with negative and positive powers of the curvature: unification of the inflation and of the cosmic acceleration
• Quantum deSitter cosmology and phantom matter
• Unifying phantom inflation with late-time acceleration: scalar phantom-non-phantom transition model and generalized holographic dark energy
• Inhomogeneous Equation of State of the Universe: Phantom Era, Future Singularity and Crossing the Phantom Barrier
• Cosmological viability of f(R)-gravity as an ideal fluid and its compatibility with a matter dominated phase
• The statistics of string/M theory vacua
• The final state and thermodynamics of dark energy universe
• Observational constraints on dark energy with generalized equations of state
• Unified phantom cosmology: inflation, dark energy and dark matter under the same standard
• Dark Energy and Viscous Cosmology
• Dark Energy: the equation of state description versus scalar-tensor or modified gravity
• The new form of the equation of state for dark energy fluid and accelerating universe
• "Expansion" around the vacuum equation of state - sudden future singularities and asymptotic behavior
• Cosmological model with viscosity media (dark fluid) described by an effective equation of state
• Is There A String Theory Landscape
• Beyond the perfect fluid hypothesis for dark energy equation of state
• de Sitter attractors in generalized gravity
• What Can WMAP Tell Us About The Very Early Universe? New Physics as an Explanation of Suppressed Large Scale Power and Running Spectral Index
• Coupled Quintessence and Phantom Based On a Dilaton

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• Bounce solutions in viscous fluid cosmology
• Multi-horizon spherically symmetric spacetimes with several scales of vacuum energy
• Inhomogeneous viscous fluids in FRW universe and finite-future time singularities
• Inhomogeneous viscous dark fluid coupled with dark matter in the FRW universe
• Inflation in Terms of a Viscous van der Waals Coupled Fluid
• Archimedean-type force in a cosmic dark fluid: I. Exact solutions for the late-time accelerated expansion
• Viscous Coupled Fluids in Inflationary Cosmology
• Archimedean-type force in a cosmic dark fluid: II. Qualitative and numerical study of a multistage Universe expansion
• Inhomogeneous viscous fluids for inflation
• The unified history of the viscous accelerating universe and phase transitions
• Inflationary Universe with a Viscous Fluid Avoiding Self-Reproduction
• Multi-fluid cosmology in Einstein gravity: analytical solutions
• Multiple $\Lambda$CDM cosmology with string landscape features and future singularities
• Fluid inflation with brane correction
• Time variable $\Lambda$ and the accelerating Universe
• Holographic representation of the unified early and late universe via a viscous dark fluid
• Light propagation with non-minimal couplings in a two-component cosmic dark fluid with an Archimedean-type force and unlighted cosmological epochs
• Electrodynamic phenomena induced by a dark fluid: Analogs of pyromagnetic, piezoelectric, and striction effects
• Dynamical Analysis of an $n-H-T$ Cosmological Quintessence Real Gas Model with a General Equation of State
• Specially Coupled Dark Energy in the Oscillating FRW Cosmology
• Viscous fluid dynamics with decaying vacuum energy density
• Coupled fluids model in FRW space-time
• Holographic description of the dissipative unified dark fluid model with axion field
• Phenomenological modification of horizon temperature
• An Infrared Divergence Problem in the cosmological measure theory and the anthropic reasoning
• Cosmic evolution of scalar fields with multiple vacua: generalized DBI and quintessence
• Nonlocal extension of causal thermodynamics of the isotropic cosmic fluid