`hamiltonian1` is not defined in an example of EstimatorV2

[Hiroshi Horii]

URL to the relevant documentation

https://docs.quantum.ibm.com/api/qiskit/primitives#overview-of-estimatorv2

Select all that apply

• typo
• code bug
• out-of-date content
• broken link
• other

Describe the fix.

from qiskit.primitives import StatevectorEstimator as Estimator
from qiskit.circuit.library import RealAmplitudes
from qiskit.quantum_info import SparsePauliOp
 
psi1 = RealAmplitudes(num_qubits=2, reps=2)
psi2 = RealAmplitudes(num_qubits=2, reps=3)
 
H1 = SparsePauliOp.from_list([("II", 1), ("IZ", 2), ("XI", 3)])
H2 = SparsePauliOp.from_list([("IZ", 1)])
H3 = SparsePauliOp.from_list([("ZI", 1), ("ZZ", 1)])
 
theta1 = [0, 1, 1, 2, 3, 5]
theta2 = [0, 1, 1, 2, 3, 5, 8, 13]
theta3 = [1, 2, 3, 4, 5, 6]
 
estimator = Estimator()
 
# calculate [ <psi1(theta1)|H1|psi1(theta1)> ]
job = estimator.run([(psi1, hamiltonian1, [theta1])])
job_result = job.result() # It will block until the job finishes.
print(f"The primitive-job finished with result {job_result}"))
 
# calculate [ [<psi1(theta1)|H1|psi1(theta1)>,
#              <psi1(theta3)|H3|psi1(theta3)>],
#             [<psi2(theta2)|H2|psi2(theta2)>] ]
job2 = estimator.run(
    [
        (psi1, [hamiltonian1, hamiltonian3], [theta1, theta3]),
        (psi2, hamiltonian2, theta2)
    ],
    precision=0.01
)
job_result = job2.result()
print(f"The primitive-job finished with result {job_result}")

hamiltonian* are not defined. I think it should be H*. If so, do sed s/hamiltonian/H/g.

[abbycross]

Hi @hhorii ! Looks like this issue should be posted in the qiskit/qiskit repo, which is where the API docs source files live: https://github.com/Qiskit/qiskit/issues/new?assignees=&labels=bug&projects=&template=BUG_REPORT.yaml - can you please open an issue there? Thanks, and I will close this issue here.