Fig. 4: Separation of the events induced by muons and γ-rays.
From: Cosmic-ray-induced correlated errors in superconducting qubit array
a Schematic of the outer vacuum chamber (OVC) of the refrigerator with (on) and without (off) Pb shield. b, c Probability of time intervals between neighboring events of the γ-ray detector and muon detectors with and without Pb shield. All solid lines are exponential fits to give τon or τoff. d The QP burst event occurrence time τMQSCPJ is measured with and then without Pb shield, and the cycle is repeated 5 times to give an average value of 16.7 ± 0.4 s (12.3 ± 0.6 s) for Pb shield on (off). Source data is provided as a Source Data file.
