New twist to preheating

研究成果: Article

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Metric perturbations typically strengthen field resonances during preheating. In contrast we present a model in which the super-Hubble field resonances are completely suppressed when metric perturbations are included. The model is the nonminimal Fakir-Unruh scenario which is exactly solvable in the long-wavelength limit when metric perturbations are included, but exhibits exponential growth of super-Hubble modes in their absence. This gravitationally enhanced integrability is exceptional, both for its rarity and for the power with which it illustrates the importance of including metric perturbations in consistent studies of preheating. We conjecture a no-go result—there exists no single-field model with growth of cosmologically relevant metric perturbations during preheating.

元の言語English
ページ数1
ジャーナルPhysical Review D - Particles, Fields, Gravitation and Cosmology
62
発行部数4
DOI
出版物ステータスPublished - 2000

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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