scqubits.Cos2PhiQubit.tphi_1_over_f_ng#

Cos2PhiQubit.tphi_1_over_f_ng(A_noise=0.0001, i=0, j=1, esys=None, get_rate=False, **kwargs)#

Calculate the 1/f dephasing time (or rate) due to charge noise.

Parameters:

  • A_noise (float) – noise strength

  • i (int >=0) – state index that along with j defines a qubit

  • j (int >=0) – state index that along with i defines a qubit

  • esys (Optional[Tuple[ndarray, ndarray]]) – evals, evecs tuple

  • get_rate (bool) – get rate or time

Returns:

time or rate – decoherence time in units of \(2\pi ({\rm system\,\,units})\), or rate in inverse units.

Return type:

float