“…The large scale fluctuations are controlled by the surface tension, γ, and obey |h(k)| 2 ∼ k −2 . This method has successfully been employed to extract the tension and bending rigidity from simulations of interfaces in polymer blends [ 159,356,357], polymer-solvent interfaces [ 317] liquid crystals [ 358,359], and lipid bilayers [ 353,137,111,354,174,17,182,355]. To do so, one numerically determines the position, h, of the interface, or bilayer, in sub-columns centered around (x i , y j ) and with lateral size ∆ (block analysis [ 360,356]).…”