Extended Data Table 2 Qubit parameters, lifetime and coherence times for 12 Ta-on-Si qubits with drive lines across two chips
From: Millisecond lifetimes and coherence times in 2D transmon qubits
Qubit | Gap (μm) | Deposition vacuum | Frequency (GHz) | \({{\boldsymbol{T}}}_{{\bf{1}}}^{{\bf{avg}}}\) (μs) | \({{\boldsymbol{T}}}_{{\bf{1}}}^{{\bf{\max }}}\) (μs) | Qavg (×106) | Qmax (×106) | \({{\boldsymbol{T}}}_{{\bf{2}}{\bf{E}}}^{{\bf{avg}}}\) (μs) | \({{\boldsymbol{T}}}_{{\bf{2}}{\bf{E}}}^{{\bf{\max }}}\) (μs) |
|---|---|---|---|---|---|---|---|---|---|
46 | 70 | UHV | 3.274 | 562.7 ± 45.5 | 638.2 ± 18.0 | 11.6 ± 0.9 | 13.1 ± 0.4 | 285.1 ± 37.2 | 319.8 ± 29.6 |
47 | 70 | UHV | 3.337 | 559.5 ± 100.3 | 729.4 ± 13.1 | 11.7 ± 2.1 | 15.3 ± 0.4 | 212.8 ± 40.7 | 290.5 ± 17.6 |
48 | 70 | UHV | 3.500 | 549.7 ± 74.9 | 706.0 ± 16.5 | 12.1 ± 1.6 | 15.5 ± 0.3 | 208.0 ± 61.3 | 395.1 ± 55.4 |
49 | 70 | UHV | 3.652 | 440.0 ± 82.6 | 569.8 ± 11.1 | 10.1 ± 1.9 | 13.1 ± 0.3 | 178.6 ± 39.9 | 258.5 ± 19.0 |
50 | 70 | UHV | 3.756 | 291.9 ± 52.7 | 382.84 ± 16.8 | 6.89 ± 1.2 | 9.03 ± 0.4 | – | – |
51 | 70 | UHV | 3.942 | 354.0 ± 19.7 | 386.49 ± 7.14 | 8.77 ± 0.5 | 9.57 ± 0.2 | 158.9 ± 36.3 | 255.9 ± 21.9 |
52 | 70 | UHV | 3.215 | 523.7 ± 139.7 | 782.3 ± 20.1 | 10.6 ± 2.8 | 15.8 ± 0.4 | 86.5 ± 27.1 | 141.9 ± 14.1 |
53 | 70 | UHV | 3.337 | 290.4 ± 46.1 | 380.88 ± 28.6 | 6.1 ± 1.0 | 7.99 ± 0.6 | 72.6 ± 45.9 | 135.0 ± 24.6 |
54 | 70 | UHV | 3.423 | 332.8 ± 101.3 | 431.9 ± 18.7 | 7.16 ± 2.2 | 9.29 ± 0.4 | 196.1 ± 58.2 | 297.6 ± 38.5 |
55 | 70 | UHV | 3.595 | 341.3 ± 50.0 | 442.0 ± 10.4 | 7.71 ± 1.1 | 9.98 ± 0.2 | 371.4 ± 58.4 | 461.5 ± 46.2 |
56 | 70 | UHV | 3.747 | 410.9 ± 61.6 | 506.4 ± 19.2 | 9.7 ± 1.4 | 11.9 ± 0.5 | 298.6 ± 66.0 | 376.2 ± 46.6 |
57 | 70 | UHV | 3.872 | 81.8 ± 13.6 | 106.6 ± 5.26 | 1.99 ± 0.3 | 2.59 ± 0.1 | 91.5 ± 25.2 | 162.8 ± 29.6 |
