Non-minimal couplings, quantum geometry and black-hole entropy

Abhay Ashtekar, Alejandro Corichi

Research output: Contribution to journalArticle

42 Scopus citations


The black-hole entropy calculation for type I isolated horizons, based on loop quantum gravity, is extended to include non-minimally coupled scalar fields. Although the non-minimal coupling significantly modifies quantum geometry, the highly non-trivial consistency checks for the emergence of a coherent description of the quantum horizon continue to be met. The resulting expression of black-hole entropy now depends also on the scalar field precisely in the fashion predicted by the first law in the classical theory (with the same value of the Barbero-Immirzi parameter as in the case of minimal coupling).

Original languageEnglish (US)
Pages (from-to)4473-4484
Number of pages12
JournalClassical and Quantum Gravity
Issue number20
StatePublished - Nov 21 2003

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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