Symmetry and entropy of black hole horizons

  title={Symmetry and entropy of black hole horizons},
  author={Olaf Dreyer and Fotini Markopoulou and Lee Smolin},
  journal={Nuclear Physics},
Generic isolated horizons in loop quantum gravity
Isolated horizons model equilibrium states of classical black holes. A detailed quantization, starting from a classical phase space restricted to spherically symmetric horizons, exists in the
A note on renormalization and black hole entropy in loop quantum gravity
Microscopic state counting for a black hole in loop quantum gravity yields a result proportional to the horizon area, and inversely proportional to Newton's constant and the Immirzi parameter. It is
Phase space and black-hole entropy of higher genus horizons in loop quantum gravity
In the context of loop quantum gravity, we construct the phase space of isolated horizons with genus greater than 0. Within the loop quantum gravity framework, these horizons are described by genus g
Black holes in loop quantum gravity.
  • Alejandro Perez
  • Physics
    Reports on progress in physics. Physical Society
  • 2017
This is a review of results on black hole physics in the context of loop quantum gravity, finding the discreteness of geometric quantities at the Planck scale predicted by this approach to quantum gravity to be key.
A comment on black hole entropy or does nature abhor a logarithm
There has been substantial interest, as of late, in the quantum-corrected form of the Bekenstein–Hawking black hole entropy. The consensus viewpoint is that the leading-order correction should be a
Generic predictions of quantum theories of gravity
I discuss generic consequences (sometimes called “soft predictions”) of a class of background independent quantum theories of spacetime called causal spin network theories. These are theories whose
Ju l 2 00 7 Renormalization and black hole entropy in Loop Quantum Gravity
Microscopic state counting for a black hole in Loop Quantum Gravity yields a result proportional to horizon area, and inversely proportional to Newton’s constant and the Immirzi parameter. It is
Generalised coherent states and combinatorics of horizon entropy
We calculate the exact degeneracy of states corresponding to the area operator in the framework of semiclassical loop quantum gravity, using techniques of combinatorial theory. The degeneracy


Quasinormal modes, the area spectrum, and black hole entropy.
A result from classical gravity concerning the quasinormal mode spectrum of a black hole is used to fix the Immirzi parameter and the Bekenstein-Hawking expression of A/4l(2)(P) for the entropy of ablack hole is arrived at.
Black Hole Entropy from Loop Quantum Gravity.
  • Rovelli
  • Physics
    Physical review letters
  • 1996
This work argues that for a (macroscopically) Schwarzschild black hole this ensemble is formed by horizons with the same area, and obtains a statistical entropy proportional to the area, as in the Bekenstein-Hawking formula.
Black-hole entropy from quantum geometry
Quantum geometry (the modern loop quantum gravity involving graphs and spin-networks instead of the loops) provides microscopic degrees of freedom that account for black-hole entropy. However, the
Quantum geometry of isolated horizons and black hole entropy
Using the earlier developed classical Hamiltonian framework as the point of departure, we carry out a non-perturbative quantization of the sector of general relativity, coupled to matter, admitting
Ambiguity of black hole entropy in loop quantum gravity
We reexmine some proposals of black hole entropy in loop quantum gravity (LQG) and consider a new possible choice of the Immirzi parameter which has not been pointed out so far. We also discuss the
Quantum black holes: Entropy and entanglement on the horizon
Quantum geometry and black hole entropy
A ``black hole sector'' of nonperturbative canonical quantum gravity is introduced. The quantum black hole degrees of freedom are shown to be described by a Chern-Simons field theory on the horizon.
String Propagation in a Black Hole Geometry
On Quantum Statistical Mechanics of a Schwarzschild Black Hole
Quantum theory of geometry, developed recently in the framework of non-perturbative quantum gravity, is used in an attempt to explain thermodynamics of Schwarzschild black holes on the basis of a
Black holes and entropy
There are a number of similarities between black-hole physics and thermodynamics. Most striking is the similarity in the behaviors of black-hole area and of entropy: Both quantities tend to increase