Quantum horizons and black-hole entropy: Inclusion of distortion and rotation

Abhay Ashtekar, Jonathan Engle, Chris Van Den Broeck

Research output: Contribution to journalArticlepeer-review

65 Scopus citations


Equilibrium states of black holes can be modelled by isolated horizons. If the intrinsic geometry is spherical, they are called type I while if it is axi-symmetric, they are called type II. The detailed theory of the geometry of quantum type I horizons and the calculation of their entropy can be generalized to type II, thereby including arbitrary distortions and rotations. The leading term in entropy of large horizons is again given by 1/4th of the horizon area for the same value of the Barbero-Immirzi parameter as in the type I case. Ideas and constructions underlying this extension are summarized.

Original languageEnglish (US)
Pages (from-to)L27-L34
JournalClassical and Quantum Gravity
Issue number4
StatePublished - Feb 21 2005

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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