One-scale Velocity-dependent One-Scale model of cosmic string evolution
Strings: 0 | Loops: 0 | ξ = 0
Cosmic strings are one-dimensional topological defects formed during symmetry-breaking phase transitions in the early universe.
The VOS (Velocity-dependent One-Scale) model predicts a scaling solution where the string correlation length ξ ∝ t,
maintained by loop production and gravitational radiation backreaction.