Black Hole Remnants and the Information Loss Paradox✩
Physics Reports 603 (2015) 1–45 Contents lists available at ScienceDirect Physics Reports journal homepage: www.elsevier.com/locate/physrep Black hole remnants and the information loss paradoxI P. Chen a,b,c,d, Y.C. Ong e,∗, D.-h. Yeom a a Leung Center for Cosmology and Particle Astrophysics, National Taiwan University, Taipei 10617, Taiwan b Graduate Institute of Astrophysics, National Taiwan University, Taipei 10617, Taiwan c Department of Physics, National Taiwan University, Taipei 10617, Taiwan d Kavli Institute for Particle Astrophysics and Cosmology, SLAC National Accelerator Laboratory, Stanford University, CA 94305, USA e Nordita, KTH Royal Institute of Technology and Stockholm University, Roslagstullsbacken 23, SE-106 91 Stockholm, Sweden article info a b s t r a c t Article history: Forty years after the discovery of Hawking radiation, its exact nature remains elusive. Accepted 20 October 2015 If Hawking radiation does not carry any information out from the ever shrinking black Available online 4 November 2015 hole, it seems that unitarity is violated once the black hole completely evaporates. On editor: S. Stieberger the other hand, attempts to recover information via quantum entanglement lead to the firewall controversy. Amid the confusions, the possibility that black hole evaporation stops Keywords: with a ``remnant'' has remained unpopular and is often dismissed due to some ``undesired Black hole remnants properties'' of such an object. Nevertheless, as in any scientific debate, the pros and cons Black hole information paradox Black hole firewall of any proposal must be carefully scrutinized. We fill in the void of the literature by Singularity in general relativity and providing a timely review of various types of black hole remnants, and provide some new quantum gravity thoughts regarding the challenges that black hole remnants face in the context of the information loss paradox and its latest incarnation, namely the firewall controversy.
[Show full text]