New twist to preheating

Shinji Tsujikawa*, Bruce A. Bassett

*この研究の対応する著者

研究成果査読

23 被引用数 (Scopus)

抄録

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.

本文言語English
論文番号043510
ページ(範囲)1-5
ページ数5
ジャーナルPhysical Review D - Particles, Fields, Gravitation and Cosmology
62
4
DOI
出版ステータスPublished - 2000 8 15

ASJC Scopus subject areas

  • 物理学および天文学(その他)

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