Operator Library

The C API provides various functions to simplify the construction of commonly used operators.

Commutator Generators


`qf_op_type_commutator()`	Computes the commutator of two operators.
`qf_op_type_anti_commutator()`	Computes the anti-commutator of two operators.
`qf_op_type_double_commutator()`	Computes the double-commutator of three operators.

This section provides a quick reference for various operator constructor functions, grouped by category.


`qf_ferm_op_from_1body_tril_spin_sym()`	Constructs from spin-symmetric triangular 1-body integrals.
`qf_ferm_op_from_1body_tril_spin()`	Constructs from separate spin-species triangular 1-body integrals.
`qf_ferm_op_from_2body_tril_spin_sym()`	Constructs from spin-symmetric triangular 2-body integrals.
`qf_ferm_op_from_2body_tril_spin()`	Constructs from separate spin-species triangular 2-body integrals.

Finally, the following additional operator generator utilities exist:


`QfFCIDump`	An electronic structure Hamiltonian in FCIDump format.