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Pion crystals hosting topologically stable baryons
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We construct analytic (3+1)-dimensional inhomogeneous and topologically non-trivial pion systems using chiral perturbation theory. We discuss the effect of isospin asymmetry with vanishing electromagnetic interactions as well as some particular configurations with non-vanishing electromagnetic interactions. The inhomogeneous configurations of the pion fields are characterized by a non-vanishing topological charge that can be identified with baryons surrounded by a cloud of pions. This system supports a topologically protected persistent superflow. When the electromagnetic field is turned on the superflow corresponds to an electromagnetic supercurrent.
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Cited by 1 Pith paper
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Baryonic vortices in rotating nuclear matter
Previously discarded global pion vortices become finite-energy and energetically competitive in rotating nuclear matter because causality bounds the system size.
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