A model of the Universe including Dark Energy accounted for by both a Quintessence Field and a (negative) Cosmological Constant

Abstract

In this work we present a model of the universe in which dark energy is modelled explicitely with both a dynamical quintessence field and a cosmological constant. Our results confirm the possibility of a future collapsing universe (for a given region of the parameter space), which is necessary for a consistent formulation of string theory and quantum field theory. We have also reproduced the measurements of modulus distance from supernovae with good accuracy.

11 pages, 4 figures, only the results for the single exponential potential are preserved. One author added. Some changes in the reference section. Submitted to Physical Review D

References in corpus (19)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• A Flat Universe from High-Resolution Maps of the Cosmic Microwave Background Radiation
• Cosmological Tracking Solutions
• Constraining dark energy with SNe Ia and large-scale structure
• On the scaling behavior of the cosmological constant and the possible existence of new forces and new light degrees of freedom
• Limitations in using luminosity distance to determine the equation of state of the universe
• Opportunities for future supernova studies of cosmic acceleration
• On Some Exponential Potentials for a Cosmological Scalar Field as Quintessence
• Results from the High-Z Supernova Search Team
• Dark Energy and the CMB
• Dark Matter and Energy in the Universe
• Cosmological constant vs. quintessence
• Tracker fields from nonminimally coupled theory
• Making Sense Of The New Cosmology
• Quintessence, Cosmological Horizons, and Self-Tuning
• CMB Constraints on a Baryonic Dark Matter-Dominated Universe
• The New Cosmology
• Cosmological Parameters 2000

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