Abstract

We investigate the strong cosmic censorship for the Dirac field in the higher dimensional Reissner-Norstrom-de Sitter black hole. To achieve this, we first use the con- formal transformation trick to massage the Dirac equation to a pair of coupled equations in a meticulously chosen orthonormal basis and derive the criterion on the quasinormal modes for the violation of the strong cosmic censorship, which turns out to be indepen- dent of the spacetime dimension. Then we apply the Crank-Nicolson method to evolve our Dirac equation in the double null coordinates and extract the low-lying quasinormal modes from the evolution data by the Prony method. It is shown for the spacetime dimension D = 4, 5, 6 under consideration that although the strong cosmic censorship is violated by the perturbation from the neutral Dirac field in the near-extremal black hole, the strong cosmic censorship can be restored when the charge of the Dirac field is increased beyond a critical value. The closer to the extremal limit the black hole is, the larger the critical charge of the Dirac field is.

Highlights

  • An inextendible CH [1,2,3]

  • We investigate the strong cosmic censorship for the Dirac field in the higher dimensional Reissner-Norstrom-de Sitter black hole

  • We first use the conformal transformation trick to massage the Dirac equation to a pair of coupled equations in a meticulously chosen orthonormal basis and derive the criterion on the quasinormal modes for the violation of the strong cosmic censorship, which turns out to be independent of the spacetime dimension

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Summary

Dirac equation in the D-dimensional RNdS black hole

We shall derive an explicit expression of the above Dirac equation in a D-dimensional RN black hole with the mass and charge parameter M and Q in the de Sitter space of radius L ds. By generalizing the conformal transformation [26,27,28] to include the electric charge and electric potential as follows gab. With this in mind, we can consider the equivalent Dirac equation in the following conformally transformed background ds. Where ∇/ 2 is the Dirac operator associated with the two-dimensional spacetime ds. ∇/ Σ is the Dirac operator on (D − 2)-dimensional unit sphere ΣD−2.

Quasinormal modes and strong cosmic censorship
Numerical scheme
Relevant results
Conclusion
A WKB approximation for the large l limit
B WKB approximation for the large q limit
Full Text
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