|View source on GitHub
Generates two-body positivity constraints on fermionic RDMs.
The specific constraints implemented are known positivity constraints
on the two-fermion reduced density matrices. Constraints are generated
in the form of FermionOperators whose expectation value is known to be
zero for any N-Representable state. Generators are used for efficiency.
number of spin-orbitals on which operators act.
number of fermions in the system.
|Constraint is a FermionOperator with zero expectation value.