期刊
ANNALES HENRI POINCARE
卷 9, 期 7, 页码 1413-1424出版社
BIRKHAUSER VERLAG AG
DOI: 10.1007/s00023-008-0392-6
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资金
- Government of Canada
- Industry Canada
- Province of Ontario
- Ministry of Research and Innovation
In this paper we give a direct proof of the Ponzano-Regge asymptotic formula for the Wigner 6j symbol starting from Racah's single sum formula. Our method treats halfinteger and integer spins on the same footing. The generalization to Minkowskian tetrahedra is direct. All orders subleading contributions can be computed in this setting. This result should be relevant for the introduction of renormalization scales in spin foam models.
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