Asymptotics of $b$-$6j$ symbols and anti-de Sitter tetrahedra

Tianyue Liu, Shuang Ming, Xin Sun +2

In this paper, we study the asymptotics of the $6j$-symbols for the principal series of the modular double of ${\mathrm{U}}_q\mathfrak{sl}(2;\mathbb{R})$, and of their analytic extensi…