Dynamics of topological defects and inflation

Nobuyuki Sakai, Hisa Aki Shinkai, Takashi Tachizawa, Keiichi Maeda

    Research output: Contribution to journalArticle

    54 Citations (Scopus)

    Abstract

    We study the dynamics of topological defects in the context of "topological inflation" proposed by Vilenkin and Linde independently. Analyzing the time evolution of planar domain walls and of global monopoles, we find that the defects undergo inflationary expansion if η ≳ 0.33mP1, where η is the vacuum expectation value of the Higgs field and mP1 is the Planck mass. This result confirms the estimates by Vilenkin and Linde. The critical value of η is independent of the coupling constant λ and the initial size of the defect. Even for defects with an initial size much greater than the horizon scale, inflation does not occur at all if η is smaller than the critical value. We also examine the effect of gauge fields for static monopole solutions and find that the spacetime with a gauge monopole has an attractive nature, contrary to the spacetime with a global monopole. It suggests that gauge fields affect the onset of inflation.

    Original languageEnglish
    Pages (from-to)655-661
    Number of pages7
    JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
    Volume53
    Issue number2
    Publication statusPublished - 1996 Jan 15

    Fingerprint

    Topological Defects
    Monopole
    monopoles
    Inflation
    Defects
    defects
    Gauge Field
    Critical value
    Space-time
    Domain Wall
    Higgs
    horizon
    domain wall
    Horizon
    Gauge
    Vacuum
    vacuum
    expansion
    estimates
    Estimate

    ASJC Scopus subject areas

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

    Cite this

    Dynamics of topological defects and inflation. / Sakai, Nobuyuki; Shinkai, Hisa Aki; Tachizawa, Takashi; Maeda, Keiichi.

    In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 53, No. 2, 15.01.1996, p. 655-661.

    Research output: Contribution to journalArticle

    Sakai, Nobuyuki ; Shinkai, Hisa Aki ; Tachizawa, Takashi ; Maeda, Keiichi. / Dynamics of topological defects and inflation. In: Physical Review D - Particles, Fields, Gravitation and Cosmology. 1996 ; Vol. 53, No. 2. pp. 655-661.
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