Exact solutions in Einstein-SU(2) sigma model yield black holes and branes with bumpy horizons stabilized by integer vorticity of superfluid pions.
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De Sitter space decays into vortex-dressed black holes via a regular Euclidean instanton that generalizes the Nariai solution, with rates organized by topological charge of the vortices.
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Exact black holes and black branes with bumpy horizons supported by superfluid pions
Exact solutions in Einstein-SU(2) sigma model yield black holes and branes with bumpy horizons stabilized by integer vorticity of superfluid pions.
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Semiclassical decay of de Sitter space into black holes with vortex-deformed horizons
De Sitter space decays into vortex-dressed black holes via a regular Euclidean instanton that generalizes the Nariai solution, with rates organized by topological charge of the vortices.