Dynamical systems analysis of tachyon dark energy model from a new perspective

Abstract

In this work we present a new scheme to study the tachyon dark energy model using dynamical systems analysis by considering parametrization of the equation of state(EoS) of the dark energy. Both the canonical and phantom field dynamics are investigated. In our method we do not require any explicit form of the tachyon potential. Instead of the potential we start with an approximate form of the EoS of the tachyon field. This EoS is phenomenologically motivated and contains some dimensionless parameters. Using our method we can construct the dynamical system which gives rise to the time evolution of the universe. We have considered two different parametrizations of the EoS and studied the phase space dynamics in details. Our analysis shows Taylor series parametrization of the EoS has serious cosmological limitations. Our proposal is generic in nature and can be applied to other scalar field dark energy models.

arXiv commentPublished in Phy.Rev.D

References in corpus (45)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• Dynamics of dark energy
• A Phantom Menace? Cosmological consequences of a dark energy component with super-negative equation of state
• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: cosmological analysis of the DR12 galaxy sample
• The 6dF Galaxy Survey: Baryon Acoustic Oscillations and the Local Hubble Constant
• An alternative to quintessence
• Accelerating Universes with Scaling Dark Matter
• Dark energy cosmology: the equivalent description via different theoretical models and cosmography tests
• A Dynamical Solution to the Problem of a Small Cosmological Constant and Late-time Cosmic Acceleration
• Large Magellanic Cloud Cepheid Standards Provide a 1% Foundation for the Determination of the Hubble Constant and Stronger Evidence for Physics Beyond LambdaCDM
• Essentials of k-essence
• The Ninth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the SDSS-III Baryon Oscillation Spectroscopic Survey
• The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Cosmological Implications from two Decades of Spectroscopic Surveys at the Apache Point observatory
• Can the dark energy equation-of-state parameter w be less than -1?
• Dark Energy Survey Year 1 Results: Cosmological Constraints from Galaxy Clustering and Weak Lensing
• H0LiCOW XIII. A 2.4% measurement of $H_0$ from lensed quasars: $5.3\sigma$ tension between early and late-Universe probes
• Tachyon Matter
• Accelerated expansion of the universe driven by tachyonic matter
• Reconstructing Dark Energy
• Dark Energy Survey Year 1 Results: Cosmological Constraints from Cosmic Shear
• Field Theory of Tachyon Matter
• Cosmological Evolution of the Rolling Tachyon
• Cosmology with tachyon field as dark energy
• New physics in light of the $H_0$ tension: an alternative view
• Interacting dark energy in the early 2020s: a promising solution to the $H_0$ and cosmic shear tensions
• Extended tachyon field, Chaplygin gas and solvable k-essence cosmologies
• Assisted inflation via tachyon condensation
• What is needed of a tachyon if it is to be the dark energy?
• Coupled dark energy: Towards a general description of the dynamics
• On the Cosmological Relevance of the Tachyon
• Revealing Intrinsic Flat $\Lambda$CDM Biases with Standardizable Candles
• Implications for the Hubble tension from the ages of the oldest astrophysical objects
• The dark energy equation of state
• Tachyonic Quintessential Inflation
• Tachyon cosmology, supernovae data and the Big Brake singularity
• Reconstructing the dark energy potential
• The transient and the late time attractor tachyon dark energy: Can we distinguish it from quintessence ?
• Cosmic infinity: A dynamical system approach
• The reconstruction of tachyon inflationary potentials
• Coupled tachyonic dark energy: a dynamical analysis
• New general parametrization of quintessence fields and its observational constraints
• The arbitrariness of potentials in interacting quintessence models
• On the Reality of the Accelerating Universe
• Tachyonic vs Quintessence dark energy: linear perturbations and CMB data

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• End equilibrium state of a spherical gravitational collapse in the presence of matter and scalar field
• Particle Production Scenario in an Algebraically Coupled Quintessence Field with a Dark Matter Fluid
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