Asymptotic analysis of the EPRL model with timelike tetrahedra

Journal article
(Original article)

Publication Details

Author(s): Sahlmann H, Kaminski W, Kisielowski M
Journal: Classical and Quantum Gravity
Publication year: 2018
Volume: 35
Journal issue: 13
ISSN: 0264-9381
Language: English


We study the asymptotic behaviour of the vertex amplitude for the EPRL spin foam model extended to include timelike tetrahedra. We analyze both, tetrahedra of signature --- (standard EPRL), as well as of signature +-- (Hnybida-Conrady extension), in a unified fashion. However, we assume all faces to be of signature --. We find that the critical points of the extended model are described again by 4-simplices and the phase of the amplitude is equal to the Regge action. Interestingly, in addition to the Lorentzian and Euclidean sectors there appear also split signature 4-simplices.

FAU Authors / FAU Editors

Kisielowski, Marcin Dr.
Chair for Theoretical Physics III (Quantum Gravity)
Sahlmann, Hanno Prof. Dr.
Professur für Theoretische Physik

External institutions with authors

University of Warsaw / Uniwersytet Warszawski

How to cite

Sahlmann, H., Kaminski, W., & Kisielowski, M. (2018). Asymptotic analysis of the EPRL model with timelike tetrahedra. Classical and Quantum Gravity, 35(13).

Sahlmann, Hanno, Wojciech Kaminski, and Marcin Kisielowski. "Asymptotic analysis of the EPRL model with timelike tetrahedra." Classical and Quantum Gravity 35.13 (2018).


Last updated on 2019-03-01 at 20:10