Unitarity and the information problem in an explicit model of black hole evaporation
arXiv:2012.07973 · doi:10.1088/1361-6382/abdf25
Abstract
We consider the black hole information problem in an explicitly defined spacetime modelling black hole evaporation. Using this context we review basic aspects of the problem, with a particular effort to be unambiguous about subtle topics, for instance precisely what is meant by entropy in various circumstances. We then focus on questions of unitarity, and argue that commonly invoked semiclassical statements of long term, evaporation time, and Page time "unitarity" may all be violated even if physics is fundamentally unitary. This suggests that there is no horizon firewall. We discuss how the picture is modified for regular (nonsingular) evaporation models. We also compare our conclusions to recent holographic studies, and argue that they are mutually compatible.
arXiv comment14 pages, 11 figures. v2: additional references
References in corpus (57)
- The Large N Limit of Superconformal Field Theories and Supergravity
- Holographic Derivation of Entanglement Entropy from AdS/CFT
- Entanglement Entropy and Quantum Field Theory
- Entropy and Area
- A Covariant Holographic Entanglement Entropy Proposal
- Geometric and Renormalized Entropy in Conformal Field Theory
- Average Entropy of a Subsystem
- Black Holes: Complementarity or Firewalls?
- Formation and evaporation of non-singular black holes
- Black holes as mirrors: quantum information in random subsystems
- Information in Black Hole Radiation
- The Stretched Horizon and Black Hole Complementarity
- The information paradox: A pedagogical introduction
- A Covariant Entropy Conjecture
- Quantum Extremal Surfaces: Holographic Entanglement Entropy beyond the Classical Regime
- The entropy of bulk quantum fields and the entanglement wedge of an evaporating black hole
- The Page curve of Hawking radiation from semiclassical geometry
- Soft Hair on Black Holes
- Reconstruction of Bulk Operators within the Entanglement Wedge in Gauge-Gravity Duality
- Jerusalem Lectures on Black Holes and Quantum Information
- Information Loss in Black Holes
- Black Hole Evaporation without Information Loss
- Time Dependence of Hawking Radiation Entropy
- The scattering matrix approach for the quantum black hole, an overview
- Black hole fireworks: quantum-gravity effects outside the horizon spark black to white hole tunneling
- Relative entropy and the Bekenstein bound
- The black hole final state
- Information Loss
- The Black Hole information problem: past, present, and future
- Black hole information, unitarity, and nonlocality
- Page Curve for an Evaporating Black Hole
- Conservative solutions to the black hole information problem
- Simple holographic models of black hole evaporation
- Information Flow in Black Hole Evaporation
- Quantum coarse-grained entropy and thermodynamics
- Black Hole evaporation: A Perspective from Loop Quantum Gravity
- Quantum coarse-grained entropy and thermalization in closed systems
- Entanglement entropy and negative energy in two dimensions
- The information paradox and the locality bound
- Time Dependence of Particle Creation from Accelerating Mirrors
- Mirror Reflections of a Black Hole
- How Fast Does Information Leak out from a Black Hole?
- The Black Hole Information Problem
- Remnant-free Moving Mirror Model for Black Hole Radiation Field
- Black Holes: Eliminating Information or Illuminating New Physics?
- Two-loop Back-reaction in 2D Dilaton Gravity
- The Interior of a Unitarily Evaporating Black Hole
- Where is the Information Stored in Black Holes?
- Extracting information about the initial state from the black hole radiation
- Algorithms for the explicit computation of Penrose diagrams
- Revisiting the black hole entropy and the information paradox
- The subtle unphysical hypothesis of the firewall theorem
- General Solution for Self-Gravitating Spherical Null Dust
- Understanding black hole evaporation using explicitly computed Penrose diagrams
- What simplified models say about unitarity and gravitational collapse
- A path(-integral) toward non-perturbative effects in Hawking radiation
- Information loss paradox revisited: farewell firewall?