20,982 research outputs found
Strong Cosmic Censorship in Charged de Sitter spacetime with Scalar Field Non-minimally Coupled to Curvature
We examine the stability and the strong cosmic censorship in the
Reissner-Nordstrom-de Sitter (RN-dS) black hole by investigating the evolution
of a scalar field non-minimally coupled to the curvature. We find that when the
coupling parameter is negative, the RN-dS black hole experiences instability.
The instability disappears when the coupling parameter becomes non-negative.
With the increase of the coupling parameter, the violation of the strong cosmic
censorship occurs at a larger critical charge ratio. But such an increase of
the critical charge is suppressed by the increase of the cosmological constant.
Different from the minimal coupling situation, it is possible to accommodate
in the near extremal black hole when the scalar field is
non-minimally coupled to curvature. The increase of the cosmological constant
can allow to be satisfied for even smaller value of the coupling
parameter. The existence of implies that the resulting curvature
can continuously cross the Cauchy horizon.Comment: 14 pages, 4 figures, 5 table
Van der Waals-like phase transition from holographic entanglement entropy in Lorentz breaking massive gravity
In this paper, phase transition of AdS black holes in lorentz breaking
massive gravity has been studied in the framework of holography. We find that
there is a first order phase transition(FPT) and second order phase
transition(SPT) both in Bekenstein-Hawking entropy(BHE)-temperature plane and
holographic entanglement entropy(HEE)-temperature plane. Furthermore, for the
FPT, the equal area law is checked and for the SPT, the critical exponent of
the heat capacity is also computed. Our results confirm that the phase
structure of HEE is similar to that of BHE in lorentz breaking massive gravity,
which implies that HEE and BHE have some potential underlying relationship.Comment: 10 pages, 10 figure
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