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2003•Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fieldsOpen access

Model of the universe including dark energy accounted for by both a quintessence field and a (negative) cosmological constant

Rolando Cárdenas, Tamé González, Yoelsy Leiva, Osmel Martín, Israel Quirós

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Abstract

In this work we present a model of the universe in which dark energy is modeled explicitly 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 both string and quantum field theories. The predictions of this model for distance modulus of supernovae are similar to those of the standard $\ensuremath{\Lambda}\mathrm{CDM}$ model.

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In this work we present a model of the universe in which dark energy is modeled explicitly 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 both string and quantum field theories. The predictions of this model for distance modulus of supernovae are similar to those of the standard $\ensuremath{\Lambda}\mathrm{CDM}$ model.

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Available abstract

In this work we present a model of the universe in which dark energy is modeled explicitly 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 both string and quantum field theories. The predictions of this model for distance modulus of supernovae are similar to those of the standard $\ensuremath{\Lambda}\mathrm{CDM}$ model.

Key concepts: Quintessence, Dark energy, Physics, Cosmological constant, Lambda-CDM model, Metric expansion of space, De Sitter universe, Theoretical physics

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