2009/12/31 by Wojciech Kamiński, Marcin Kisielowski, Jerzy Lewandowski · 1 citation
Physics and Astronomy · #gr-qc #hep-th
paper · pdf · doi:10.1088/0264-9381/27/16/165020
published as Class.Quant.Grav.27:165020,2010 · RevTex4, 15 pages, 5 figures; theorem of injectivity of EPRL map corrected
arxiv created 2011/09/23 · arxiv updated 2011/09/26
Do the SU(2) intertwiners parametrize the space of the EPRL solutions to the simplicity constraint? What is a complete form of the partition function written in terms of this parametrization? We prove that the EPRL map is injective for n-valent vertex in case when it is a map from SO(3) into SO(3)xSO(3) representations. We find, however, that the EPRL map is not isometric. In the consequence, in order to be written in a SU(2) amplitude form, the formula for the partition function has to be rederived. We do it and obtain a new, complete formula for the partition function. The result goes beyond the SU(2) spin-foam models framework.