qiskit.providers.aer.noise.thermal_relaxation_error

thermal_relaxation_error(t1, t2, time, excited_state_population=0)

Return a single-qubit thermal relaxation quantum error channel.

Parameters

• t1 (double) – the $T_1$ relaxation time constant.
• t2 (double) – the $T_2$ relaxation time constant.
• time (double) – the gate time for relaxation error.
• excited_state_population (double) – the population of $|1\rangle$ state at equilibrium (default: 0).

Returns

a quantum error object for a noise model.

Return type

QuantumError

Raises

NoiseError – If noise parameters are invalid.

Additional information:

• For parameters to be valid $T_1$ and $T_2$ must satisfy $T_2 \le 2 T_1$.
• If $T_2 \le T_1$ the error can be expressed as a mixed reset and unitary error channel.
• If $T_1 < T_2 \le 2 T_1$ the error must be expressed as a general non-unitary Kraus error channel.