Can type II Semi-local cosmic strings form?

Abstract

We present the simplest possible model for a semi-local string defect in which a U(1) gauged subgroup of an otherwise global SU(2) is broken to produce local cosmic strings endowed with current-carrying properties. Restricting attention to type II vortices for which the non current-carrying state is unstable, we show that a condensate must form microscopically and macroscopically evolve towards a chiral configuration. It has been suggested that such configurations could potentially exist in a stable state, thereby inducing large cosmological consequences based on equilibrium angular momentum supported loop configurations (vortons). Here we show that the current itself induces a macroscopic (longitudinal) instability: we conclude that type II semi-local cosmic strings cannot form in a cosmological context.

11 pages, 5 figures

References in corpus (7)

• Hybrid inflation along waterfall trajectories
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• Twisted Superconducting Semilocal Strings
• Stability Analysis of The Twisted Superconducting Semilocal Strings
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Cited by in corpus (7)

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• Vortices and magnetic bags in Abelian models with extended scalar sectors and some of their applications
• Stabilisation of semilocal strings by dark scalar condensates
• Vortices with scalar condensates in two-component Ginzburg-Landau systems
• Stabilizing the Semilocal String with a Dilatonic Coupling
• Electroweak strings with dark scalar condensates and their (in)stability
• Non-Abelian Vortices with a Twist