Skyrme Strings

TL;DR

This paper constructs and analyzes non-topological Skyrme string solutions with charge, revealing stability limits, decay conditions, and potential dynamical formation scenarios within the Skyrme model.

Contribution

It introduces nontopological charged string solutions in the Skyrme model and studies their stability and decay properties.

Findings

Existence of a critical angular velocity for decay

Maximum stable string length comparable to a skyrmion size

Potential formation of Skyrme strings from monopole strings

Abstract

We construct nontopological string solutions with U(1) Noether charge in the Skyrme model with a pion mass term, and examine their stability by taking linear perturbations. The solution exhibits a critical angular velocity beyond which the configuration energetically prefers to decay by emitting pions. This critical point is observed as a cusp in the relation between energy and charge. We find that the maximum length for the string to be stable is comparable to the size of one skyrmion. Beyond the length, it is unstable to decay. This instability raises the possiblity of dynamical realization of Skyrme strings from monopole strings inside a domain wall.