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qiskit.algorithms.IterativePhaseEstimation.construct_circuit

IterativePhaseEstimation.construct_circuit(unitary, state_preparation, k, omega=0.0, measurement=False)[source]

Construct the kth iteration Quantum Phase Estimation circuit.

For details of parameters, see Fig. 2 in https://arxiv.org/pdf/quant-ph/0610214.pdf.

Parameters
  • unitary (QuantumCircuit) -- The circuit representing the unitary operator whose eigenvalue (via phase) will be measured.

  • state_preparation (QuantumCircuit) -- The circuit that prepares the state whose eigenphase will be measured. If this parameter is omitted, no preparation circuit will be run and input state will be the all-zero state in the computational basis.

  • k (int) -- the iteration idx.

  • omega (float) -- the feedback angle.

  • measurement (bool) -- Boolean flag to indicate if measurement should be included in the circuit.

Returns

the quantum circuit per iteration

Return type

QuantumCircuit