Extended Data Fig. 3: Short-time Ramsey experiment analysis.
From: A superconducting dual-rail cavity qubit with erasure-detected logical measurements
(A) For these experiments, we perform a modified version of the Ramsey experiment described in the Main Text. Here we sweep both the Ramsey delay as well as the phase of the second π/2 pulse. (B) Top left: Logical results showing Ramsey oscillations for each delay out to 20 μs. The markers correspond to experimental results while the lines correspond to the fit. Bottom left: Fit residuals. Right: Extracted Ramsey contrast (valued between 0 and 1) as a function of Ramsey delay. Each marker corresponds to a different delay, color-coded to the data in the left column. Straight black line is a linear fit to the data.
