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

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arxiv astro-ph/0206315 v2 pith:ELWPB3DY submitted 2002-06-18 astro-ph

Rolando Cardenas , Tame Gonzalez , Yoelsy Leiva , Osmel Martin , Israel Quiros This is my paper
classification astro-ph
keywords fielduniverseconstantcosmologicaldarkenergymodelquintessence
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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.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Avoiding recollapse in an open-AdS universe via a self-tuning-like mechanism

    astro-ph.CO 2026-03 conditional novelty 6.0 of 10

    In a power-law Fab-Four model, a scalar field can screen a negative cosmological constant so an open universe expands linearly (a ∝ t) instead of recollapsing, at least for the representative branch shown.

  2. Is Dark Energy an Effective Manifestation of Non-equilibrium Thermodynamics? -- Insights from DESI

    astro-ph.CO 2025-07 conditional novelty 5.0 of 10

    Two phenomenological dark matter creation rates can reproduce the accelerated expansion of the universe and fit current background data as well as or slightly better than LambdaCDM for some DESI-based data combinations.

  3. Can the universe experience an AdS landscape since matter-radiation equality?

    gr-qc 2025-06 conditional novelty 5.0 of 10

    A universe with an AdS (negative cosmological constant) phase at recombination and another at low redshift is compatible with Planck, DESI, Pantheon Plus and SH0ES data, though not preferred by them.

  4. The Lifespan of our Universe

    hep-ph 2025-06 conditional novelty 4.0 of 10

    If the axion dark energy model with a negative cosmological constant is the true explanation of DES/DESI data, the universe will end in a big crunch at a total age of about 33 billion years.

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