Critical energy density of O$(n)$ models in $d=3$

Rachele Nerattini, Andrea Trombettoni, Lapo Casetti

A relation between O$(n)$ models and Ising models has been recently conjectured [L. Casetti, C. Nardini, and R. Nerattini, Phys. Rev. Lett. 106, 057208 (2011)]. Such a relation, in…