Solitonic D-branes and brane annihilation

Gia Dvali, Alexander Vilenkin

    Research output: Contribution to journalArticle

    Abstract

    We point out some intriguing analogies between field-theoretic solitons (topological defects) and D-branes. Annihilating soliton-antisoliton pairs can produce stable solitons of lower dimensionality. Solitons that localize massless gauge fields in their world-volume automatically imply the existence of open flux tubes ending on them and closed flux tubes propagating in the bulk. We discuss some aspects of this localization on explicit examples of unstable wall-antiwall systems. The annihilation of these walls can be described in terms of tachyon condensation which renders the world-volume gauge field nondynamical. During this condensation the world-volume gauge fields (open string states) are resonantly excited. These can later decay into closed strings, or get squeezed into a network of flux tubes similar to a network of cosmic strings formed at a cosmological phase transition. Although, as in the D-brane case, perturbatively one can find exact time-dependent solutions, when the energy of the system stays localized in the plane of the original soliton, such solutions are unstable with respect to decay into open and closed string states. Thus, when a pair of such walls annihilates, the energy is carried away (at least) by closed string excitations ("glueballs"), which are the lowest-energy excitations about the bulk vacuum. Suggested analogies can be useful for the understanding of the complicated D-brane dynamics and of the production of topological defects and reheating during brane collision in the earlyuniverse.

    Original languageEnglish (US)
    Article number046002
    JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
    Volume67
    Issue number4
    DOIs
    StatePublished - 2003

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    strings
    solitary waves
    tubes
    condensation
    defects
    decay
    guy wires
    excitation
    energy
    vacuum
    heating
    collisions

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)

    Cite this

    Solitonic D-branes and brane annihilation. / Dvali, Gia; Vilenkin, Alexander.

    In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 67, No. 4, 046002, 2003.

    Research output: Contribution to journalArticle

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