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
Quantum Reference Frames via Transition Amplitudes in Timeless Quantum Gravity
Sign Up to like & getrecommendations! Published in 2018 at "Physical Review D"
DOI: 10.1103/physrevd.98.026023
Abstract: We propose an algorithm of extracting Schrodinger theories under all viable physical time from the Einstein-Hilbert path integral, formulated as the timeless transition amplitudes $\hat{\mathbb{P}}:\mathbb{K} \to \mathbb{K}^*$ between the boundary states in a kinematic Hilbert… read more here.
Keywords: transition amplitudes; quantum; reference; hat mathbb ... See more keywords