A note on black hole entropy in loop quantum gravity. (13th July 2015)

• Record Type: Journal Article
• Authors: Carlip, S
• Is Part Of: Classical and quantum gravity. Volume 32:Number 15(2015:Aug.)
• Publication Date: 2015-07-13
• Subjects: loop quantum gravity -- black hole thermodynamics -- black hole entropy -- Bekenstein–Hawking entropy; Quantum gravity -- Periodicals; Gravitation -- Periodicals; Relativity (Physics) -- Periodicals; Space and time -- Periodicals; Periodicals; 521.1
• DOI: 10.1088/0264-9381/32/15/155009
• Languages: English
• ISSNs: 0264-9381

Abstract

Abstract: Several recent results have hinted that black hole thermodynamics in loop quantum gravity simplifies if one chooses an imaginary Barbero–Immirzi parameter . This suggests a connection with or conformal field theories at the 'boundaries' formed by spin network edges intersecting the horizon. I present a bit of background regarding the relevant conformal field theories, along with some speculations about how they might be used to count black hole states. I show, in particular, that a set of unproven but plausible assumptions can lead to a boundary conformal field theory whose density of states matches the Bekenstein–Hawking entropy.