Time-dependent evolution of a non-rigid Nambu-Goto string around a Kerr black hole produces short-lived energy extraction followed by a propagating wave and approach to a known static configuration, with total extracted energy bounded by μM.
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gr-qc 2years
2026 2verdicts
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A single-function deformation of 3D eta-Einstein metrics produces 4D Einstein spacetimes sourced by a string cloud, covering FLRW, Kantowski-Sachs, LRS Bianchi, Taub-NUT-(A)dS, and Reissner-Nordstrom-(A)dS solutions with spherical, planar or hyperbolic symmetry.
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Time evolution of a Nambu-Goto string coiling around a Kerr black hole
Time-dependent evolution of a non-rigid Nambu-Goto string around a Kerr black hole produces short-lived energy extraction followed by a propagating wave and approach to a known static configuration, with total extracted energy bounded by μM.
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Geometric deformations of symmetric spacetimes with a string cloud
A single-function deformation of 3D eta-Einstein metrics produces 4D Einstein spacetimes sourced by a string cloud, covering FLRW, Kantowski-Sachs, LRS Bianchi, Taub-NUT-(A)dS, and Reissner-Nordstrom-(A)dS solutions with spherical, planar or hyperbolic symmetry.