Recall that the sum of initially focused conditions (λ and λ from Eq. 24) affects the distribution of the mapping variables (Z, Z ) and so the effect of this focusing does not appear in the estimator explicitly. Additionally, the meaning of a single trajectory in spin-PLDM is rather unclear, since the true correlation function depends not on simple averaging over a statistical ensemble but also over a set of sums {λ, λ } that, in principle, give different dynamics compared to those focused to a different density matrix element (i.e., an initial state for both the forward and backward components). As such, we will not perform any analysis on individual trajectories from this method.