The Lee--Yang Edge Exponent via Logarithmic Averaging

Qiao Wang

Let $F$ be the thermodynamic free energy of a ferromagnetic Ising model,analytic on ${\mathbb{C}}^{\ast }\setminus {\mathcal{Z}}_{\hat{I}}^2$. The Lee--Yang edge at $z_c\in \partial {\mathcal{Z}}_{\hat{I}}^2$ is…