Strong cosmic censorship in charged de sitter spacetime with scalar field non-minimally coupled to curvature
Abstract We examine 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 for the stable RN-dS black hole, with the increase of the coupling parameter, the violation of...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2019-11-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | http://link.springer.com/article/10.1140/epjc/s10052-019-7416-x |
| Summary: | Abstract We examine 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 for the stable RN-dS black hole, 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 $$\beta \ge 1$$ β≥1 in the near extremal black hole when the scalar field is non-minimally coupled to curvature. $$\beta $$ β here is defined as $$\beta \equiv -\frac{\mathrm {Im}\;\omega }{\kappa _{-}}$$ β≡-Imωκ- where $$\kappa _{-}$$ κ- is the surface gravity of Cauchy horizon and $$\omega $$ ω is the frequency of quasinormal modes. The increase of the cosmological constant can allow $$\beta \ge 1$$ β≥1 to be satisfied for even smaller value of the coupling parameter. The existence of $$\beta \ge 1$$ β≥1 implies that the resulting curvature can continuously cross the Cauchy horizon. |
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| ISSN: | 1434-6044 1434-6052 |