Investigations of strong cosmic censorship in 3-dimensional black strings

Abstract

Investigating the quasinormal modes of a massive scalar field on the 3-dimensional black string (3dBS), we study the strong cosmic censorship (SCC) conjecture for the 3dBS in the T-dual relationship with the 3-dimensional rotating anti-de-Sitter (BTZ) black hole. It is shown that even though geometries of the two spacetimes are quite different, such as asymptotically AdS for the BTZ black hole and asymptotically flat for the 3dBS, the BTZ black hole and the 3dBS share similar properties for the SCC. Concretely speaking, the SCC conjecture can be violated even for asymptotically flat spacetime, i.e. the 3dBS. These observations lead us to an assumption that the T-dual transformation preserves spacetime symmetries, at least, which are relevant to the SCC. In addition, we find a new feature of the quasinormal mode at the Cauchy horizon: in the case of the 3dBS, the spectral gap, ${\alpha }_{\mathrm{BS}}$ at the Cauchy horizon is not determined by the `$\omega$-frequency mode', but the `m-frequency mode'.

arXiv comment22 pages, 2 figures, Added some references. Corrected typos

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Cited by in corpus (1)

• Strong Cosmic Censorship in light of Weak Gravity Conjecture for Charged Black Holes