Coarse graining and first order phase transitions

J. Berges, N. Tetradis, C. Wetterich
1997 Physics Letters B  
We discuss the dependence of the coarse grained free energy and the classical interface tension on the coarse graining scale $k$. A stable range appears only if the renormalized dimensionless couplings at the critical temperature are small. This gives a quantitative criterion for the validity of computations within Langer's theory of spontaneous bubble nucleation.
doi:10.1016/s0370-2693(96)01654-1 fatcat:ldlk3makznhpfgv35p5wumgtsa