Horizon entropy with loop quantum gravity methods

Journal article
(Original article)

Publication Details

Author(s): Sahlmann H, Pranzetti D
Journal: Physics Letters B
Publisher: Elsevier
Publication year: 2015
Volume: 746
Pages range: 209-216
ISSN: 0370-2693


We show that the spherically symmetric isolated horizon can be described in terms of an SU(2) connection and an su(2)-valued one-form, obeying certain constraints. The horizon symplectic structure is precisely the one of 3d gravity in a first order formulation. We quantize the horizon degrees of freedom in the framework of loop quantum gravity, with methods recently developed for 3d gravity with non-vanishing cosmological constant. Bulk excitations ending on the horizon act very similarly to particles in 3d gravity. The Bekenstein-Hawking law is recovered in the limit of imaginary Barbero-Immirzi parameter. Alternative methods of quantization are also discussed.

FAU Authors / FAU Editors

Pranzetti, Daniele Dr.
Lehrstuhl für Theoretische Physik
Sahlmann, Hanno Prof. Dr.
Professur für Theoretische Physik

How to cite

Sahlmann, H., & Pranzetti, D. (2015). Horizon entropy with loop quantum gravity methods. Physics Letters B, 746, 209-216. https://dx.doi.org/10.1016/j.physletb.2015.04.070

Sahlmann, Hanno, and Daniele Pranzetti. "Horizon entropy with loop quantum gravity methods." Physics Letters B 746 (2015): 209-216.


Last updated on 2018-19-04 at 03:19