20,693 research outputs found
Instability of small AdS black holes in sixth-order gravity
We investigate the stability analysis of AdS black holes in the higher
dimensional sixth-order gravity. This gravity is composed of Ricci cubic
gravity and Lee-Wick term. It indicates that the Ricci tensor perturbations
exhibit unstable modes for small AdS black holes in Ricci cubic gravity by
solving the Lichnerowicz-type linearized equation. We show that the correlated
stability conjecture holds for the AdS black hole by computing all
thermodynamic quantities in Ricci cubic gravity. Furthermore, we find a newly
non-AdS black hole in Ricci cubic gravity by making use of a static
eigenfunction of the Lichnerowicz operator.Comment: 27 pages, 4 figures. arXiv admin note: text overlap with
arXiv:1801.0462
Instability of Reissner-Nordstr\"{o}m black hole in Einstein-Maxwell-scalar theory
The scalarization of Reissner-Nordstr\"{o}m black holes was recently proposed
in the Einstein-Maxwell-scalar theory. Here, we show that the appearance of the
scalarized Reissner-Nordstr\"{o}m black hole is closely related to the
Gregory-Laflamme instability of the Reissner-Nordstr\"{o}m black hole without
scalar hair.Comment: 22 pages, 10 figures, version to appear in EPJ
Stability of scalarized charged black holes in the Einstein-Maxwell-Scalar theory
We analyze the stability of scalarized charged black holes in the
Einstein-Maxwell-Scalar (EMS) theory with quadratic coupling. These black holes
are labelled by the number of , where is called the
fundamental black hole and denote the -excited black holes.
We show that the black hole is stable against full perturbations, whereas
the excited black holes are unstable against the -mode scalar
perturbation. This is consistent with the EMS theory with exponential coupling,
but it contrasts to the scalarized black hole in the
Einstein-Gauss-Bonnet-Scalar theory with quadratic coupling. This implies that
the endpoint of unstable Reissner-Nordstr\"{o}m black holes with
is the black hole with the same . Furthermore, we study the scalarized
charged black holes in the EMS theory with scalar mass .Comment: 23 pages, 11 figures. arXiv admin note: text overlap with
arXiv:1812.0360
Reentrant phase transitions of higher-dimensional AdS black holes in dRGT massive gravity
We study the criticality and phase transition in the extended phase
space of anti-de Sitter (AdS) black holes in higher-dimensional de Rham,
Gabadadze and Tolley (dRGT) massive gravity, treating the cosmological constant
as pressure and the corresponding conjugate quantity is interpreted as
thermodynamic volume. Besides the usual small/large black hole phase
transitions, the interesting thermodynamic phenomena of reentrant phase
transitions (RPTs) are observed for black holes in all -dimensional
spacetime when the coupling coefficients of massive potential satisfy
some certain conditions.Comment: 14 pages, several references are added, v2: published in EPJ
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