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Cited by 117Cosmology and Gravitation TheoriesNoncommutative and Quantum Gravity TheoriesBlack Holes and Theoretical Physics

Scalar field dynamics in Friedmann-Robertson-Walker spacetimes

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Boyanovsky, D., Cormier, D., de Vega, H. J., Holman, R., Singh, A., Srednicki, M.·1997·Physical Review D
DOI 10.1103/physrevd.56.1939
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Abstract

We study the nonlinear dynamics of quantum fields in matter- and radiation-dominated universes, using the nonequilibrium field theory approach combined with the nonperturbative Hartree and the large $N$ approximations. We examine the phenomenon of explosive particle production due to spinodal instabilities and parametric amplification in expanding universes with and without symmetry breaking. For a variety of initial conditions, we compute the evolution of the inflaton, its quantum fluctuations, and the equation of state. We find explosive growth of quantum fluctuations, although particle production is somewhat sensitive to the expansion of the universe. In the large $N$ limit for symmetry-breaking scenarios, we determine generic late time solutions for any flat Friedmann-Robertson-Walker (FRW) cosmology. We also present a complete and numerically implementable renormalization scheme for the equation of motion and the energy momentum tensor in flat FRW cosmologies. In this scheme the renormalization constants are independent of time and of the initial conditions.

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  • There is a large body of observational evidence that suggests there is more matter than antimatter in the Universe up to scales of the order of the Hubble radius.

    “There is a large body of observational evidence that suggests that the there is more matter than antimatter in the Universe up to scales of the order of the Hubble radius[44, 45].”

    From Phase Transitions in the Early and Present Universe (2006) · cites this paper as [44]

    The Introduction (p. 3) and Conclusions (p. 22) discuss particle production and matter-dominated equations of state, not an observed excess of matter over antimatter. Searches for antimatter, baryon asymmetry, observational evidence, and a Hubble-radius scale found no passage addressing the claim. (LLM, conf=0.77)

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Research works printed but not linked: 2

  1. [6][6] L. Kofman, A. Linde and A. Starobinsky, Phys. Rev. Lett. 73 , 3195 (1994) and 76 , 1011 (1996); gr-qc/9508019 (1995). L. Kofman, astro-ph/9605155 (1996). - · arXiv
  2. [21][21] For a thorough exposition of non-equilibrium methods in cosmology see, for example: E. Calzetta and B.-L. Hu, Phys. Rev. D35 , 495 (1988); ibid D37 , 2838 (1988); J. P. Paz, Phys. Rev. D41 , 1054 (1990); ibid D42 , 529 (1990); B.-L. Hu in Bannf/Cap Workshop on Thermal Field Theories: proceedings , edited by F.C. Khanna, R. Kobes, G. Kunstatter, H. Umezawa (World Scientific, Singapore, 1994), p.309 and in the Proceedings of the Second Paris Cosmology Colloquium, Observatoire de Paris , edited by H. J. de Vega and N. S´ anchez (World Scientific, Singapore, 1995), p.111 and references therein. -

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Authors
Boyanovsky, D., Cormier, D., de Vega, H. J., Holman, R., Singh, A., & Srednicki, M.
Affiliations
  • University of Pittsburgh (US)
  • Carnegie Mellon University (US)
  • University of California, Santa Barbara (US)
ORCID
Venue
Physical Review D
Publisher
American Physical Society (APS)
Published
1997-08-15
Volume
56
Issue
4
Pages
1939-1957
ISSN
  • 0556-2821 (ISSN-L)
  • 1089-4918
DOI
10.1103/physrevd.56.1939
OpenAlex
W2026547641
Cited by
117
References
41
Citations by year
2026: 1 · 2025: 2 · 2024: 2 · 2023: 2 · 2020: 2 · 2019: 2 · 2018: 1 · 2017: 3 · 2015: 3 · 2014: 2 · 2013: 4 · 2012: 2
FWCI
12.38
Type
journal article
Language
en
Open access
Licence
link.aps.org/licenses/aps-default-license (vor)
Locations
  • Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • CERN Document Server (European Organization for Nuclear Research) (submittedVersion)
  • arXiv (Cornell University)
Funders
U.S. Department of Energy (DEFG0291ER40682)
Topics
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Cosmology and Gravitation Theories
  • Physical Sciences › Physics and Astronomy › Statistical and Nonlinear Physics › Noncommutative and Quantum Gravity Theories
  • Physical Sciences › Physics and Astronomy › Nuclear and High Energy Physics › Black Holes and Theoretical Physics
Keywords
scalar field dynamics, FRW cosmology, non-equilibrium field theory, Hartree approximation, large-N approximation, spinodal instability, parametric amplification, inflaton, quantum fluctuations, equation of state, symmetry breaking, renormalization scheme, matter-dominated universe, radiation-dominated universe

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