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Smeared branes and the Gubser-Mitra conjecture

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arxiv hep-th/0405026 v1 pith:NDQOTBZ2 submitted 2004-05-04 hep-th

Smeared branes and the Gubser-Mitra conjecture

classification hep-th
keywords smeareddynamicalchargedconjecturegubser-mitrainstabilitysolutionsansatz
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We show that smeared brane solutions, where a charged black p-brane is smeared uniformly over one of the transverse directions, can have a Gregory-Laflamme type dynamical instability in the smeared direction even when the solution is locally thermodynamically stable. These thus provide counterexamples to the Gubser-Mitra conjecture, which links local dynamical and thermodynamic stability. The existence of a dynamical instability is demonstrated by exploiting an ansatz due to Harmark and Obers, which relates charged solutions to neutral ones.

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