Fundamental Plasmid Strings and Black Rings

Abstract

We construct excited states of fundamental strings that admit a semiclassical description as rotating circular loops of string. We identify them with the supergravity solutions for rotating dipole rings. The identification involves a precise match of the mass, radius and angular momentum of the two systems. Moreover, the degeneracy of the string state reproduces the parametric dependence of the entropy in the supergravity description. When the solutions possess two macroscopic angular momenta, they are better described as toroidal configurations (tubular loops) instead of loops of string. We argue that the decay of the string state can be interpreted as superradiant emission of quanta from the ergoregion of the rotating ring.

27 pages, 2 figures, references added, JHEP version

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• New Horizons for Black Holes and Branes
• Microscopic Theory of Black Hole Superradiance
• Blackfolds in Supergravity and String Theory
• Pair creation in non-extremal fuzzball geometries
• Black Rings in Taub-NUT and D0-D6 interactions
• Blackfolds in (Anti)-de Sitter Backgrounds
• Oscillating supertubes and neutral rotating black hole microstates
• The correspondence between rotating black holes and fundamental strings
• New Geometries for Black Hole Horizons
• Dual 2d CFT Identification of Extremal Black Rings from Holes
• Dynamics of Toroidal Spiral Strings around Five-dimensional Black Holes
• Exact Microscopic Entropy of Non-Supersymmetric Extremal Black Rings
• Toroidal Spiral Nambu-Goto Strings around Higher-Dimensional Black Holes
• Stationary Closed Strings in Five-dimensional Flat Spacetime
• New asymptotically (Anti)-de Sitter black holes in (super)gravity
• Instability of stationary closed strings winding around flat torus in five-dimensional Schwarzschild spacetimes