Interior quasinormal modes and strong cosmic censorship

Recent work has argued that the strong cosmic censorship conjecture is violated by near-extremal Reissner-Nordstrom-de Sitter (RNdS) black holes but respected by Kerr-de Sitter (Kerr-dS) black holes. It has also been shown that the conjecture is violated by near-extremal Banados-Teitelboim-Zanelli (BTZ) black holes. The latter result relies on a coincidence between exterior and interior quasinormal frequencies. If this coincidence were to occur also for RNdS or Kerr-dS, then it would significantly modify the conclusions of earlier work. In this paper, it is demonstrated that this coincidence does not occur for RNdS or Kerr-dS, and so the conclusions of the earlier work remain valid.

Automated summary

Recent research suggests that the strong cosmic censorship conjecture is violated by near-extremal RNdS and BTZ black holes, but respected by Kerr-dS black holes. The study demonstrates that the coincidence between exterior and interior quasinormal frequencies does not occur for RNdS or Kerr-dS, keeping the conclusions of earlier work valid.