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Spinodal instabilities and the dark energy problem.

D Cormier1, R Holman

  • 1Institute for Physics, University of Dortmund, D-44221 Dortmund, Germany.

Physical Review Letters
|September 16, 2000
PubMed
Summary

The universe's accelerated expansion is explained by soft boson fields and spinodal instabilities. This model satisfies constraints for quintessence, a key component in cosmic acceleration.

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Area of Science:

  • Cosmology
  • Theoretical Physics
  • Particle Physics

Background:

  • The accelerated expansion of the Universe is a major cosmological puzzle.
  • Type Ia supernovae observations provide key evidence for this acceleration.
  • Current models, like quintessence, attempt to explain this phenomenon.

Purpose of the Study:

  • To explain the accelerated expansion of the Universe using a novel theoretical framework.
  • To investigate the role of nonequilibrium dynamics in cosmological models.
  • To satisfy observational constraints on dark energy models.

Main Methods:

  • Utilizing the nonequilibrium dynamics of naturally soft boson fields.
  • Analyzing spinodal instabilities within these boson field systems.
  • Comparing model predictions with high redshift Type Ia supernova data.

Main Results:

  • The proposed model successfully explains the accelerated expansion of the Universe.
  • Spinodal instabilities provide a mechanism for achieving the required equation of state at late times.
  • The model adheres to all known constraints for quintessence models.

Conclusions:

  • Nonequilibrium dynamics of soft boson fields offer a viable explanation for cosmic acceleration.
  • Spinodal instabilities are a crucial element in this cosmological mechanism.
  • This approach provides a consistent framework for understanding dark energy.

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