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- W2912504417 abstract "We consider Gedanken experiments to destroy an extremal or near-extremal Banados-Teitelboim-Zanelli (BTZ) black hole by throwing matter into the horizon. These black holes are vacuum solutions to ($2+1$)-dimensional gravity theories, and are asymptotically ${mathrm{AdS}}_{3}$. Provided the null energy condition for the falling matter, we prove the following---(i) in a Mielke-Baekler model without ghost fields, when torsion is present, an extremal BTZ black hole can be overspun and becomes a naked conical singularity; (ii) in three-dimensional Einstein gravity and chiral gravity, which both live in the torsionless limits of the Mielke-Baekler model, an extremal BTZ black hole cannot be overspun; and (iii) in both Einstein gravity and chiral gravity, a near-extremal BTZ black hole cannot be overspun, leaving the weak cosmic censorship preserved. To obtain these results, we follow the analysis of Sorce and Wald on their Gedanken experiments to destroy a Kerr-Newman black hole, and calculate the second order variation of the black hole mechanics. Furthermore, Wald's type of Gedanken experiments provide an operational procedure of proving the third law of black hole dynamics. Through the $mathrm{AdS}/mathrm{CFT}$ correspondence, our results on BTZ black holes also indicate that a third law of thermodynamics holds for the holographic conformal field theories dual to three-dimensional Einstein gravity and chiral gravity." @default.
- W2912504417 created "2019-02-21" @default.
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- W2912504417 date "2019-08-23" @default.
- W2912504417 modified "2023-10-16" @default.
- W2912504417 title "Gedanken experiments to destroy a BTZ black hole" @default.
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- W2912504417 doi "https://doi.org/10.1103/physrevd.100.044043" @default.
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