Effects of Inflation on a Cosmic String Loop Population

Details Effects of Inflation on a Cosmic String Loop Population Effects of Inflation on a Cosmic String Loop Population

2007-10-11

arxiv.org/abs/0710.2210v1

Phys.Rev.D76:083510,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, 5 figures, accepted for publication in Physical Review D

Scientific paper

10.1103/PhysRevD.76.083510

We study the evolution of simple cosmic string loop solutions in an inflationary universe. We show, for the particular case of circular loops, that periodic solutions do exist in a de Sitter universe, below a critical loop radius $R_c H=1/2$. On the other hand, larger loops freeze in comoving coordinates, and we explicitly show that they can survive more $e$-foldings of inflation than point-like objects. We discuss the implications of these findings for the survival of realistic cosmic string loops during inflation, and for the general characteristics of post-inflationary cosmic string networks. We also consider the analogous solutions for domain walls, in which case the critical radius is $R_c H=2/3$.

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