Summary
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1 Sample Definition And Size
The study investigated an underdamped (quality factor Q ≈ 30) current‑biased Josephson junction. The sample size refers to the single junction studied; no meta‑analysis or multiple samples were reported.
2 Study Type
Experimental observational study measuring the escape rate from the zero‑voltage state of a Josephson junction, comparing thermal activation and macroscopic quantum tunneling regimes.
3 Conflicts Of Interest
No conflicts of interest are declared in the available metadata.
4 Results Summary
The escape rate of the underdamped Josephson junction was measured as a function of bias current and via resonant activation with microwaves in the thermal regime. At low temperatures, the escape rate became temperature‑independent and matched the zero‑temperature theoretical prediction for macroscopic quantum tunneling with no adjustable parameters.