Speaker
Description
Cosmic strings arise naturally in both unifying theories and superstring inspired inflation models, in which case the fundamental strings formed in the very early universe may have stretched to macroscopic scales.
To better understand the underlying physical mechanisms and how the macroscopical properties of such networks evolve, analytical developments are needed. In this work, we have explored the generalised velocity-dependent one-scale model for current-carrying cosmic strings, and in particular studied how three phenomenological parameters introduced to model the loop chopping efficiency, the possible overall biases from additional degrees of freedom and an eventual bias between charge and current, impact the allowed asymptotic solutions of the network.
This analysis also reveals the expansion rates that are compatible with each solution branch, and the conditions under which it would be possible to have charge and current solutions that are not erased through the universe expansion, and their relation to the phenomenological parameters that characterize the network.
