Table 1 Fit parameters: channel transparency T, number of conduction channels N and charging energy EC, along with the corresponding 95% confidence intervals, determined from the single transparency model using Eq. (2) and (4)

From: Strongly anharmonic flux-tunable transmon based on InAs-Al 2D heterostructure

 

N1Δ (GHz)

T1

N2Δ (GHz)

T2

EC (GHz)

η

I

221.02  ± 22.9

0.999 ± 0.099

98.90 ± 2.9

0.926 ± 0.006

0.197 ± 0.00 

0.96

II

138.03 ± 3.0

0.928 ± 0.006

466.98 ± 88.5

0.542 ± 0.095

0.163 ± 0.002

7.3

III

52.03

0.968

806.25

0.147

0.350

1.25

  1. The anharmonicity η is extracted from measurements in Fig. 2f-h. The details of the error analysis are described in supplementary information 9.
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