Table 1 Error budget for the one-layer and two-layer QEC processes. The predicted lifetime calculated from the error model agrees well with the measured lifetimes

From: Beating the break-even point with a discrete-variable-encoded logical qubit

Error source

One-layer QEC

Two-layer QEC

Intrinsic errora

6.4%

12.4%

Detection error

1.4%

2.8%

Recovery error

2.9%

3.8%

Thermal error

0.8%

1.1%

Total error

11.5%

20.1%

Predicted lifetime

757 μs

824 μs

Measured lifetime

755 ± 9 μs

805 ± 18 μs

  1. aThese errors are estimated from numerical simulations.
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