A double O(3)-sigma model minimally coupled to Maxwell admits self-dual vortices with quantized flux in which two sigma sectors combine into a single topological sector under a periodic cosine potential.
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Topological and self-dual vortices in a double sigma model with Maxwell coupling
A double O(3)-sigma model minimally coupled to Maxwell admits self-dual vortices with quantized flux in which two sigma sectors combine into a single topological sector under a periodic cosine potential.