Semiclassical back reaction in the formation of a straight cosmic string

Antonio Campos, Rosario Martín, Enric Verdaguer
1995 Physical Review D, Particles and fields  
A simple model for the formation of a straight cosmic string, wiggly or unperturbed is considered. The gravitational field of such string is computed in the linear approximation. The vacuum expectation value of the stress tensor of a massless scalar quantum field coupled to the string gravitational field is computed to the one loop order. Finally, the back-reaction effect on the gravitational field of the string is obtained by solving perturbatively the semiclassical Einstein's equations.
doi:10.1103/physrevd.52.4319 pmid:10019659 fatcat:l4uxo7ib7fhcpchwz4joz5j4s4