Investigating bursts of suppressed relaxation time using Quantum Inspire Starmon-5 and a 17-transmon processor

Following McEwen et al. [1], we investigate bursts of suppressed qubit relaxation time in two superconducting quantum processors: the publicly available Quantum Inspire Starmon-5 [2] as well as a Surface-17 processor used for quantum error correction experiments. We exploit mid-circuit measurement to detect the incidence rate. Next, we use a restless measurement technique to resolve the spatial and temporal characteristics of individual bursts. While our observations are consistent with [1] with regard to incidence rate and global impact, we find a characteristic recovery time of a few hundred microseconds, about two-three orders of magnitude faster.



[1] M. McEwen et al., Nature Physics 18, 107 (2022).

[2] quantum-inspire.com