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arXiv · 2212.01400

Gregory-Laflamme and Superradiance encounter Black Resonator Strings

Oscar J. C. Dias·Takaaki Ishii·Keiju Murata·Jorge E. Santos·Benson Way
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Abstract

We construct novel black strings that are neither time-translation invariant, nor axisymmetric, nor translationally invariant in the string direction, but nevertheless have a helical Killing vector field. These solutions branch from the superradiant instability of $D=6$ Myers-Perry black strings with equal angular momenta. We coin these solutions as {\it black resonator strings} and we find that they have more entropy than Myers-Perry black strings for the energies and angular momenta where both solutions coexist. We also construct Kaluza-Klein geons, which share the symmetries of black resonator strings, but are horizonless. Unlike in other superradiant systems, Kaluza-Klein geons are not the horizonless limit of black resonator strings and are instead entirely separate solutions.

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Oscar J. C. Dias, Takaaki Ishii, Keiju Murata, Jorge E. Santos, Benson Way. 2022-12-02. Gregory-Laflamme and Superradiance encounter Black Resonator Strings. https://doi.org/10.1007/jhep02(2023)069

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