Appearance of cosmic strings in the early Universe is a common manifestation new physics typically linked to some high energy scale. In this paper, we discuss different situation, where model underlying string formation approximately scale free. String tension naturally related square temperature hot primordial plasma such setting, and hence decreases with (cosmic) time. With gravitational back...

We investigate the impact of Coleman-Weinberg inflation on stochastic gravity wave background spectrum emitted by intermediate-scale cosmic strings. The string network is partially inflated and reenters horizon at later times after end inflation, such that short loops are not produced. This leads to a significant modification we explore in detail. find can help satisfy Parkes Pulsar Timing Arra...

In this letter we uncover a new parametric resonance of axionic cosmic strings. This process is triggered by the presence on string internal mode excitations that resonantly amplify amplitude transverse displacements string. We study running numerical simulations demonstrate existence phenomenon in $(3+1)$ dimensional lattice field theory and compare results with analytic expectations for effec...

Topological defects are predicted in many gauge models as solitonic solutions resulting from spontaneous breaking of gauge or global symmetries. Among all these solutions, cosmic strings, and in particular those with conducting properties, have a number of cosmological applications.1 The possible scenarios for structure formation by cosmic strings depend very much in the detail of the model. On...

Cosmic strings are stable topological defects that may have been created at a phase transition in the early universe. It is a growing belief that, for a wide range of theoretical models, such strings may be superconducting and carry substantial currents which have important astrophysical and cosmological effects. This paper explores the possibility of generation of a primordial magnetic field b...