Numerical methods for EPRL spin foam transition amplitudes and Lorentzian recoupling theory
Sign Up to like & getrecommendations! Published in 2018 at "General Relativity and Gravitation"
DOI: 10.1007/s10714-018-2452-7
Abstract: The intricated combinatorial structure and the non-compactness of the Lorentz group have always made the computation of $$SL(2,\mathbb {C})$$SL(2,C) EPRL spin foam transition amplitudes a very hard and resource demanding task. With sl2cfoam we provide… read more here.
Keywords: transition amplitudes; eprl spin; spin foam; foam transition ... See more keywords
Discrete gravity dynamics from effective spin foams
Sign Up to like & getrecommendations! Published in 2020 at "Classical and Quantum Gravity"
DOI: 10.1088/1361-6382/ac011b
Abstract: The first computation of a spin foam dynamics that provides a test of the quantum equations of motions of gravity is presented. Specifically, a triangulation that includes an inner edge is treated. The computation leverages… read more here.
Keywords: spin foam; effective spin; semiclassical regime; discrete gravity ... See more keywords
Numerical analysis of spin foam dynamics and the flatness problem
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review D"
DOI: 10.1103/physrevd.102.106003
Abstract: In this paper, we apply a recently proposed numerical algorithm for finding stationary phase points in spin foam amplitudes. We study a spin foam amplitude with three vertices and a bulk face in 4d BF… read more here.
Keywords: spin foam; numerical analysis; flatness problem; foam ... See more keywords