Gedanken Experiments to Destroy a BTZ Black Hole
Baoyi Chen, Feng-Li Lin, Bo Ning

TL;DR
This paper investigates whether extremal and near-extremal BTZ black holes can be destroyed by matter infall, demonstrating that in certain gravity models they can be overspun, while in others they cannot, thus preserving cosmic censorship.
Contribution
It extends gedanken experiment analysis to BTZ black holes in various 3D gravity theories, proving conditions under which they can or cannot be overspun.
Findings
Extremal BTZ black holes can be overspun in models with torsion.
In Einstein and chiral gravity, extremal and near-extremal BTZ black holes cannot be overspun.
Results support the third law of black hole mechanics and holographic thermodynamics.
Abstract
We consider gedanken experiments to destroy an extremal or near-extremal BTZ black hole by throwing matter into the horizon. These black holes are vacuum solutions to (2+1)-dimensional gravity theories, and are asymptotically . 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 3-dimensional Einstein gravity and chiral gravity, which both live in torsionless limits of 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…
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
Taxonomy
TopicsBlack Holes and Theoretical Physics · Particle physics theoretical and experimental studies · Cosmology and Gravitation Theories
Gedanken Experiments to Destroy a BTZ Black Hole
Baoyi [email protected], Feng-Li [email protected] and Bo [email protected]
a* TAPIR, Walter Burke Institute for Theoretical Physics,*
California Institute of Technology, Pasadena, California 91125, USA
b* Department of Physics, National Taiwan Normal University,*
No. 88, Sec. 4, Ting-Chou Road, Taipei 11677, Taiwan
c* College of Physical Science and Technology, *
Sichuan University, Chengdu, Sichuan 610065, China
