openfermion.measurements.two_body_fermion_constraints
Generates two-body positivity constraints on fermionic RDMs.
openfermion.measurements.two_body_fermion_constraints(
n_orbitals, n_fermions
)
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.
Args |
|---|
n_orbitals
|
int
number of spin-orbitals on which operators act.
|
n_fermions
|
int
number of fermions in the system.
|
Yields |
|---|
|
Constraint is a FermionOperator with zero expectation value.
|
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Last updated 2025-02-12 UTC.
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