# Difference between revisions of "F opt"

In the original 2PT paper by Lin et al.[3], the effective hard-sphere diameter of a monocomponent system (all molecules/groups are the same) is not explicitly calculated. Instead, the fluidicity is uniquely defined from the thermodynamic state of the system, $N,V,T$, and the (translational) zero-frequency density of states, $S_\text{trn}(0)$.