triqs::hilbert_space::space_partition::merge_subspaces

#include <triqs/hilbert_space/space_partition.hpp>

Synopsis

std::pair<matrix_element_map_t, matrix_element_map_t> merge_subspaces (space_partition::operator_t const & Cd,

space_partition::operator_t const & C,

bool store_matrix_elements = true)

Perform Phase II of the automatic partition algorithm

Merge some of the invariant subspaces together, to ensure that a given operator Cd and its Hermitian conjugate C generate only one-to-one connections between the subspaces.

Parameters

• Cd Subject operator Cd, normally a creation operator

• C Conjugate of Cd, normally an annihilation operator

• store_matrix_elements Should we store the non-vanishing matrix elements of Cd?

Returns

Non-vanishing matrix elements of Cd and C, if store_matrix_elements = true