R. Bikbov et S. Nechaev, Topological relaxation of entangled flux lattices: Single versus collective line dynamics - art. no. 150602, PHYS REV L, 8715(15), 2001, pp. 0602
A symbolic language allowing one to solve statistical problems for the syst
ems with non-Abelian braidlike topology in 2 + 1 dimensions is developed. T
he approach is based on the similarity between a growing braid and a "heap
of colored pieces." As an application, the problem of a vortex glass transi
tion in high-T-c superconductors is reexamined on a microscopic level.