From Bogoliubov-de Gennes to Ginzburg-Landau: Critical Points Near $T_{\mathrm{c}}$ in the Non-Magnetic Case

Rupert L. Frank, Christian Hainzl, Dong Hao Ou Yang

We study the relation between the Bogoliubov-de Gennes (BdG) equation and the Ginzburg-Landau (GL) equation for a BCS model without external fields. While previous rigorous derivat…