triqs_ctseg::precompute_fprefactor
#include <triqs_ctseg.hpp>
class precompute_fprefactor
Object which precomputes the prefactor \(I_{o_1}(\tau)\) for the improved estimator
\(I_{o_1}\) is used in the computation of the improved estimator \(F_{o_1}(\tau)\). It is defined as:
\[I_{o_1}(\tau) = \int_0^\beta d\bar{\tau} \sum_{o_2}\]
hat{mathcal{U}}_{o_1,o_2}(tau-bar{tau}) n_{o_2}(bar{tau})
models the concept of mc_generic auxiliary precomputation.
Note
In the measurement all times are accessed for a given orbital and not
vice versa; Storage in vector of maps instead of map of vectors keeps the individual maps small