PhaseEstimationCircuit

class PhaseEstimationCircuit(operator=None, state_in=None, iqft=None, num_time_slices=1, num_ancillae=1, expansion_mode='trotter', expansion_order=1, evo_time=6.283185307179586, state_in_circuit_factory=None, unitary_circuit_factory=None, shallow_circuit_concat=False, pauli_list=None)

Bases: object

Quantum Phase Estimation Circuit.

Parameters

• operator (Optional[WeightedPauliOperator]) – the hamiltonian Operator object

• state_in (Union[QuantumCircuit, InitialState, None]) – the InitialState component or a quantum circuit

• the initial quantum state (representing) –

• iqft (Optional[QuantumCircuit]) – the Inverse Quantum Fourier Transform as circuit or Aqua component

• num_time_slices (int) – the number of time slices

• num_ancillae (int) – the number of ancillary qubits to use for the measurement

• expansion_mode (str) – the expansion mode (trotter|suzuki)

• expansion_order (int) – the suzuki expansion order

• evo_time (float) – the evolution time

• state_in_circuit_factory (Optional[CircuitFactory]) – the initial state represented by a CircuitFactory object

• unitary_circuit_factory (Optional[CircuitFactory]) – the problem unitary represented by a CircuitFactory object

• shallow_circuit_concat (bool) – indicate whether to use shallow (cheap) mode for circuit concatenation

• pauli_list (Optional[List[Pauli]]) – the flat list of paulis for the operator

Raises

AquaError – Missing input

Methods

construct_circuit

Construct the Phase Estimation circuit

Attributes

ancillary_register

returns ancillary register

auxiliary_register

returns auxiliary register

state_register

returns state register