NoiseModel#

class tqec.utils.NoiseModel(idle_depolarization, additional_depolarization_waiting_for_m_or_r=0, gate_rules=None, measure_rules=None, any_clifford_1q_rule=None, any_clifford_2q_rule=None)[source]#

Bases: object

Represent a noise model that can be applied to a stim.Circuit.

Methods

__init__(idle_depolarization[, ...])

Represent a noise model that can be applied to a stim.Circuit.

noisy_circuit(circuit, *[, system_qubits, ...])

Return a noisy version of the given circuit, by applying the receiving noise model.

si1000(p)

Superconducting inspired noise.

uniform_depolarizing(p)

Near-standard circuit depolarizing noise.

Detailed methods

Parameters:

  • idle_depolarization (float)

  • additional_depolarization_waiting_for_m_or_r (float)

  • gate_rules (dict[str, NoiseRule] | None)

  • measure_rules (dict[str, NoiseRule] | None)

  • any_clifford_1q_rule (NoiseRule | None)

  • any_clifford_2q_rule (NoiseRule | None)

__init__(idle_depolarization, additional_depolarization_waiting_for_m_or_r=0, gate_rules=None, measure_rules=None, any_clifford_1q_rule=None, any_clifford_2q_rule=None)[source]#

Represent a noise model that can be applied to a stim.Circuit.

Parameters:

  • idle_depolarization (float)

  • additional_depolarization_waiting_for_m_or_r (float)

  • gate_rules (dict[str, NoiseRule] | None)

  • measure_rules (dict[str, NoiseRule] | None)

  • any_clifford_1q_rule (NoiseRule | None)

  • any_clifford_2q_rule (NoiseRule | None)

noisy_circuit(circuit, *, system_qubits=None, immune_qubits=None)[source]#

Return a noisy version of the given circuit, by applying the receiving noise model.

Parameters:

  • circuit (Circuit) – The circuit to layer noise over.

  • system_qubits (set[int] | None) – All qubits used by the circuit. These are the qubits eligible for idling noise.

  • immune_qubits (set[int] | None) – Qubits to not apply noise to, even if they are operated on.

Returns:

The noisy version of the circuit.

Return type:

Circuit

static si1000(p)[source]#

Superconducting inspired noise.

As defined in “A Fault-Tolerant Honeycomb Memory”: https://arxiv.org/abs/2108.10457

Small tweak from the paper: The measurement result is probabilistically flipped instead of the input qubit.

Parameters:

p (float)

Return type:

NoiseModel

static uniform_depolarizing(p)[source]#

Near-standard circuit depolarizing noise.

Everything has the same parameter p. Single-qubit Clifford gates get single-qubit depolarization. Two-qubit Clifford gates get single-qubit depolarization. Dissipative gates have their result probabilistically bit-flipped (or phase-flipped if appropriate).

Non-demolition measurement is treated a bit unusually in that it is the result that is flipped instead of the input qubit.

Parameters:

p (float)

Return type:

NoiseModel