# qiskit.quantum_info.gate_error¶

gate_error(channel, target=None, require_cp=True, require_tp=False)[소스]

Return the gate error of a noisy quantum channel.

The gate error $$E$$ is given by the average gate infidelity

$E(\mathcal{E}, U) = 1 - F_{\text{ave}}(\mathcal{E}, U)$

where $$F_{\text{ave}}(\mathcal{E}, U)$$ is the average_gate_fidelity() of the input quantum channel $$\mathcal{E}$$ with a target unitary $$U$$.

매개변수
• channel (QuantumChannel) – noisy quantum channel.

• target (Operator or None) – target unitary operator. If None target is the identity operator [Default: None].

• require_cp (bool) – require channel to be completely-positive [Default: True].

• require_tp (bool) – require channel to be trace-preserving [Default: False].

반환값

The average gate error $$E$$.

반환 형식

float

예외
• QiskitError – if the channel and target do not have the same dimensions, or have different input and output dimensions.

• QiskitError – if the channel and target or are not completely-positive (with require_cp=True) or not trace-preserving (with require_tp=True).