Fluctuation-dissipation formula for bubble-wall velocity

Details Fluctuation-dissipation formula for bubble-wall velocity Fluctuation-dissipation formula for bubble-wall velocity

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992phrvd..46.3223k&link_type=abstract

Physical Review D (Particles, Fields, Gravitation, and Cosmology), Volume 46, Issue 8, 15 October 1992, pp.R3223-R3226

Physics

27

Particle-Theory And Field-Theory Models Of The Early Universe, Phase Transitions: General Studies

Scientific paper

We derive a general relation between the steady bubble-wall velocity set by friction effects at a first-order phase transition in a theory with a slightly nondegenerate potential, and an equilibrium correlation function in a theory where the potential is strictly degenerate. The correlation function is expressed through the imaginary, dissipative part of the equilibrium self-energy of the order parameter (a scalar field). We present a sample calculation in a model where parameters were chosen to justify the perturbative evaluation of the self-energy. Our estimate for the electroweak phase transition suggests that, if this transition is of first order, the bubble wall propagates at a nonrelativistic velocity.

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