scqubits.TunableTransmon.t1_charge_impedance#
- TunableTransmon.t1_charge_impedance(i=1, j=0, Z=50, T=0.015, total=True, esys=None, get_rate=False, noise_op=None)#
Noise due to charge coupling to an impedance (such as a transmission line).
References: Schoelkopf et al (2003), Ithier et al (2005)
- Parameters:
i (int >=0) – state index that along with j defines a transition (i->j)
j (int >=0) – state index that along with i defines a transition (i->j)
Z (
Union
[float
,Callable
]) – impedance; a fixed value or function of omegaT (
float
) – temperature in Kelvintotal (
bool
) – if False return a time/rate associated with a transition from state i to state j. if True return a time/rate associated with both i to j and j to i transitionsesys (
Optional
[Tuple
[ndarray
,ndarray
]]) – evals, evecs tupleget_rate (
bool
) – get rate or timenoise_op (ndarray | csc_matrix | Qobj | None) –
- Returns:
time or rate – decoherence time in units of \(2\pi ({\rm system\,\,units})\), or rate in inverse units.
- Return type:
float