Notes on black-hole evaporation

  title={Notes on black-hole evaporation},
  author={W. G. Unruh},
  journal={Physical Review D},
  • W. Unruh
  • Published 15 August 1976
  • Physics
  • Physical Review D
This paper examines various aspects of black-hole evaporation. A two-dimensional model is investigated where it is shown that using fermion-boson cancellation on the stress-energy tensor reduces the energy outflow to zero, while other noncovariant techniques give the Hawking result. A technique for replacing the collapse by boundary conditions on the past horizon is developed which retains the essential features of the collapse while eliminating some of the difficulties. This set of boundary… 

Figures from this paper

On the origin of black hole evaporation radiation

  • P. Davies
  • Physics
    Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences
  • 1976
The physical basis underlying the black hole evaporation process is clarified by a calculation of the expectation value of the energy-momentum tensor for a massless scalar field in a completely

Hawking radiation of a quantum black hole in an inflationary universe

The quantum stress-energy tensor of a massless scalar field propagating in the two-dimensional Vaidya-de Sitter metric, which describes a classical model spacetime for a dynamical evaporating black

Long time black hole evaporation with bounded Hawking flux

The long time behaviour of an evaporating black hole presents a challenge to theoretical physics and touches relevant conceptual issues of quantum gravity, such as the information paradox. There are

Black hole evaporation in de Sitter space

We investigate the evaporation process of a Kerr–de Sitter black hole with the Unruh–Hawking-like vacuum state, which is a realistic vacuum state modelling the evaporation process of a black hole

Trace anomaly and evaporation of spherical black holes

  • Paolo Meda
  • Physics
    The Sixteenth Marcel Grossmann Meeting
  • 2023
From the time of the discovery made by Hawking that black holes can emit radiation, black hole evaporation has become of great interest in analyzing the interplay between matter and gravity. A

Black hole S-matrix for a scalar field

We describe a unitary scattering process, as observed from spatial infinity, of massless scalar particles on an asymptotically flat Schwarzschild black hole background. In order to do so, we split

Black hole evaporation without information loss

An approach to black hole quantization is proposed wherein it is assumed that quantum coherence is preserved. After giving our motivations for such a quantization procedure we formulate the