quri_parts.circuit.noise package

AmplitudeDampingNoise(amplitude_damping_rate, excited_state_population, qubit_indices=(), target_gates=())

Single qubit amplitude damping noise.

Parameters:

• amplitude_damping_rate (float) – Probability of amplitude damping.

• excited_state_population (float) – Excited state population.

• qubit_indices (Sequence[int]) – Sequence of target qubit indices.

• target_gates (Sequence[circuit.gate_names.NonParametricGateNameType]) – Sequence of target gate names.

Return type:

GateNoiseInstruction

BitFlipNoise(error_prob, qubit_indices=(), target_gates=())

Single qubit bit flip noise.

Parameters:

• error_prob (float) – Probability of noise generation.

• qubit_indices (Sequence[int]) – Sequence of target qubit indices.

• target_gates (Sequence[circuit.gate_names.NonParametricGateNameType]) – Sequence of target gate names.

Return type:

GateNoiseInstruction

BitPhaseFlipNoise(error_prob, qubit_indices=(), target_gates=())

Single qubit bit and phase flip noise.

Parameters:

• error_prob (float) – Probability of noise generation.

• qubit_indices (Sequence[int]) – Sequence of target qubit indices.

• target_gates (Sequence[circuit.gate_names.NonParametricGateNameType]) – Sequence of target gate names.

Return type:

GateNoiseInstruction

class CircuitNoiseInstance

Bases: object

noises_for_depth(qubits, circuit)

noises_for_gate(gate, circuit)

DepolarizingNoise(error_prob, qubit_indices=(), target_gates=())

Single qubit depolarizing noise.

Parameters:

• error_prob (float) – Probability of noise generation.

• qubit_indices (Sequence[int]) – Sequence of target qubit indices.

• target_gates (Sequence[circuit.gate_names.NonParametricGateNameType]) – Sequence of target gate names.

Return type:

GateNoiseInstruction

class DepthIntervalNoise(single_qubit_noises, depth_interval)

Bases: object

name()

class GateIntervalNoise(single_qubit_noises, gate_interval)

Bases: object

name()

class GateNoiseInstruction(name, qubit_count, params, qubit_indices, target_gates, pauli_list=Ellipsis, prob_list=Ellipsis, kraus_operators=Ellipsis, gate_matrices=Ellipsis)

Bases: object

gate_matrices

kraus_operators

name

params

pauli_list

prob_list

qubit_count

qubit_indices

target_gates

GeneralDepolarizingNoise(error_prob, qubit_count, qubit_indices=(), target_gates=())

Multi qubit general depolarizing noise.

In the case of multi qubit noise, qubit_indices should specify the qubits on which the target gate is acting, in any order, without excess or deficiency.

Parameters:

• error_prob (float) – Probability of noise generation.

• qubit_count (int) – Number of qubits of the noise.

• qubit_indices (Sequence[int]) – Sequence of target qubit indices.

• target_gates (Sequence[circuit.gate_names.NonParametricGateNameType]) – Sequence of target gate names.

Return type:

GateNoiseInstruction

KrausNoise(kraus_list, qubit_indices=(), target_gates=())

Multi qubit Kraus noise.

In the case of multi qubit noise, qubit_indices should specify the qubits on which the target gate is acting, in any order, without excess or deficiency.

Parameters:

• kraus_list (Sequence[Sequence[Sequence[float]]]) – Sequence of Kraus operator matrices.

• qubit_indices (Sequence[int]) – Sequence of target qubit indices.

• target_gates (Sequence[circuit.gate_names.NonParametricGateNameType]) – Sequence of target gate names.

Return type:

GateNoiseInstruction

class MeasurementNoise(single_qubit_noises, qubit_indices=Ellipsis)

Bases: object

name()

class NoiseModel

Bases: object

add_depth_interval_noise(noise)

add_gate_interval_noise(noise)

add_gate_noise(noise)

add_measurement_noise(noise)

add_noise()

extend()

gate_noise_from_id(noise_id)

gate_noise_list()

noises_for_circuit()

noises_for_gate(gate)

NoiseInstruction

Represents a backend-independent noise instruction to be added to NoiseModel.

alias of GateNoiseInstruction | GateIntervalNoise | DepthIntervalNoise | MeasurementNoise

PauliNoise(pauli_list, prob_list, qubit_indices=(), target_gates=(), eq_tolerance=1e-08, name='PauliNoise')

Multi qubit Pauli noise.

In the case of multi qubit noise, qubit_indices should specify the qubits on which the target gate is acting, in any order, without excess or deficiency.

Parameters:

• pauli_list (Sequence[Sequence[int]]) – Sequence of series of Pauli ids.

• prob_list (Sequence[float]) – Sequence of probability for each Pauli operations.

• qubit_indices (Sequence[int]) – Sequence of target qubit indices.

• target_gates (Sequence[circuit.gate_names.NonParametricGateNameType]) – Sequence of target gate names.

• eq_tolerance (float) – Allowed error in the total probability over 1.

• name (str) – Give Specified name for the noise.

Return type:

GateNoiseInstruction

PhaseAmplitudeDampingNoise(phase_damping_rate, amplitude_damping_rate, excited_state_population, qubit_indices=(), target_gates=())

Single qubit phase and amplitude damping noise.

Parameters:

• phase_damping_rate (float) – Probability of phase damping.

• amplitude_damping_rate (float) – Probability of amplitude damping.

• excited_state_population (float) – Excited state population.

• qubit_indices (Sequence[int]) – Sequence of target qubit indices.

• target_gates (Sequence[circuit.gate_names.NonParametricGateNameType]) – Sequence of target gate names.

Return type:

GateNoiseInstruction

PhaseDampingNoise(phase_damping_rate, qubit_indices=(), target_gates=())

Single qubit phase damping noise.

Parameters:

• phase_damping_rate (float) – Probability of phase damping.

• qubit_indices (Sequence[int]) – Sequence of target qubit indices.

• target_gates (Sequence[circuit.gate_names.NonParametricGateNameType]) – Sequence of target gate names.

Return type:

GateNoiseInstruction

PhaseFlipNoise(error_prob, qubit_indices=(), target_gates=())

Single qubit phase flip noise.

Parameters:

• error_prob (float) – Probability of noise generation.

• qubit_indices (Sequence[int]) – Sequence of target qubit indices.

• target_gates (Sequence[circuit.gate_names.NonParametricGateNameType]) – Sequence of target gate names.

Return type:

GateNoiseInstruction

ProbabilisticNoise(gate_matrices, prob_list, qubit_indices=(), target_gates=(), eq_tolerance=1e-08)

Multi qubit probabilistic noise.

This noise is defined by giving matrices representing noise gate operations and the probability of each operation explicitly.

In the case of multi qubit noise, qubit_indices should specify the qubits on which the target gate is acting, in any order, without excess or deficiency.

Parameters:

• gate_matrices (Sequence[Sequence[Sequence[float]]]) – Sequence of matrices representing gate operations.

• prob_list (Sequence[float]) – Sequence of probability for each operation.

• qubit_indices (Sequence[int]) – Sequence of target qubit indices.

• target_gates (Sequence[circuit.gate_names.NonParametricGateNameType]) – Sequence of target gate names.

• eq_tolerance (float) – Allowed error in the total probability over 1.

Return type:

GateNoiseInstruction

QubitNoisePair

alias of tuple[Sequence[int], GateNoiseInstruction]

ResetNoise(p0, p1, qubit_indices=(), target_gates=())

Single qubit reset noise.

Parameters:

• p0 (float) – Reset probability to \(|0\rangle\).

• p1 (float) – Reset probability to \(|1\rangle\).

• qubit_indices (Sequence[int]) – Sequence of target qubit indices.

• target_gates (Sequence[circuit.gate_names.NonParametricGateNameType]) – Sequence of target gate names.

Return type:

GateNoiseInstruction

ThermalRelaxationNoise(t1, t2, gate_time, excited_state_population, qubit_indices=(), target_gates=())

Sigle qubit thermal relaxation noise.

Parameters:

• t1 (float) – \(T_1\) relaxation time.

• t2 (float) – \(T_2\) relaxation time.

• gate_time (float) – Gate time.

• excited_state_population (float) – Excited state population.

• qubit_indices (Sequence[int]) – Target qubit indices.

• target_gates (Sequence[circuit.gate_names.NonParametricGateNameType]) – Target gate names.

Return type:

GateNoiseInstruction

Submodules

• quri_parts.circuit.noise.noise_instruction module
  • AmplitudeDampingNoise()
  • BitFlipNoise()
  • BitPhaseFlipNoise()
  • DepolarizingNoise()
  • DepthIntervalNoise
    • DepthIntervalNoise.name()
  • GateIntervalNoise
    • GateIntervalNoise.name()
  • GateNoiseInstruction
    • GateNoiseInstruction.gate_matrices
    • GateNoiseInstruction.kraus_operators
    • GateNoiseInstruction.name
    • GateNoiseInstruction.params
    • GateNoiseInstruction.pauli_list
    • GateNoiseInstruction.prob_list
    • GateNoiseInstruction.qubit_count
    • GateNoiseInstruction.qubit_indices
    • GateNoiseInstruction.target_gates
  • GeneralDepolarizingNoise()
  • KrausNoise()
  • MeasurementNoise
    • MeasurementNoise.name()
  • NoiseInstruction
  • PhaseFlipNoise()
  • PauliNoise()
  • PhaseAmplitudeDampingNoise()
  • PhaseDampingNoise()
  • ProbabilisticNoise()
  • ResetNoise()
  • ThermalRelaxationNoise()
• quri_parts.circuit.noise.noise_model module
  • NoiseModel
    • NoiseModel.add_depth_interval_noise()
    • NoiseModel.add_gate_interval_noise()
    • NoiseModel.add_gate_noise()
    • NoiseModel.add_measurement_noise()
    • NoiseModel.add_noise()
    • NoiseModel.extend()
    • NoiseModel.gate_noise_from_id()
    • NoiseModel.gate_noise_list()
    • NoiseModel.noises_for_circuit()
    • NoiseModel.noises_for_gate()
  • CircuitNoiseInstance
    • CircuitNoiseInstance.noises_for_depth()
    • CircuitNoiseInstance.noises_for_gate()