Scaleinvariant string evolution with friction
Abstract
We study the effects of friction on the scaling evolution of string networks in condensed matter and cosmological contexts. We derive a generalized ``onescale'' model with the string correlation length L and velocity v as dynamical variables. In nonrelativistic systems, we obtain a wellknown L~t^{1/2} law, showing that loop production is important. For electroweak cosmic strings, we show transient damped epoch scaling with L~t^{5/4} (or, in the matter era, L~t^{3/2}). A low initial density implies an earlier period with L~t^{1/2}. For GUT strings, the approach to linear scaling L~t is faster than previously estimated.
 Publication:

Physical Review D
 Pub Date:
 January 1996
 DOI:
 10.1103/PhysRevD.53.R575
 arXiv:
 arXiv:hepph/9507335
 Bibcode:
 1996PhRvD..53..575M
 Keywords:

 11.27.+d;
 64.60.Cn;
 Extended classical solutions;
 cosmic strings domain walls texture;
 Orderdisorder transformations;
 statistical mechanics of model systems;
 High Energy Physics  Phenomenology;
 Astrophysics;
 Condensed Matter
 EPrint:
 8 pages, uuencoded gziped .ps file. Paper submitted to Phys. Rev. Lett