qiskit.ignis.verification.coherence_limit

coherence_limit(nQ=2, T1_list=None, T2_list=None, gatelen=0.1)

The error per gate (1-average_gate_fidelity) given by the T1,T2 limit.

Parameters

• nQ (int) – number of qubits (1 and 2 supported).
• T1_list (list) – list of T1’s (Q1,…,Qn).
• T2_list (list) – list of T2’s (as measured, not Tphi). If not given assume T2=2*T1 .
• gatelen (float) – length of the gate.

Returns

coherence limited error per gate.

Return type

float

Raises

ValueError – if there are invalid inputs