PIRSA:11100092

WKB Techniques for Wigner 3nj Symbols

Yu, L. (2011). WKB Techniques for Wigner 3nj Symbols. Perimeter Institute. https://pirsa.org/11100092

Yu, Liang. WKB Techniques for Wigner 3nj Symbols. Perimeter Institute, Oct. 19, 2011, https://pirsa.org/11100092 

          @misc{ pirsa_PIRSA:11100092,
            doi = {10.48660/11100092},
            url = {https://pirsa.org/11100092},
            author = {Yu, Liang},
            keywords = {Quantum Gravity},
            language = {en},
            title = {WKB Techniques for Wigner 3nj Symbols},
            publisher = {Perimeter Institute},
            year = {2011},
            month = {oct},
            note = {PIRSA:11100092 see, \url{https://pirsa.org}}
          }

Liang Yu University of California, Berkeley

Talk numberPIRSA:11100092
DOI10.48660/11100092
Collection
Talk Type Scientific Series
Subject

Abstract

This talk focuses on an application of a WKB technique that is a generalization of the Born-Oppenheimer approximation to the Schwinger model of angular momentum. This work makes it possible to express the asymptotic limits of higher 3nj symbols in terms of the asymptotic limits of lower 3nj symbols, when only a subset of quantum numbers are taken to be large. After an introduction of the the technique, we show that the 15j symbol has different asymptotic limits in terms of a combination of several Ponzano Regge actions when different subsets of quantum numbers are taken large.