Summary
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1 Sample Definition And Size
The study investigated Nb–NbOₓ–PbIn Josephson tunnel junctions fabricated on silicon chips, with junctions in cross-strip geometries of either 10×10 µm² or 80×10 µm². The exact number of junctions tested is not specified in the available abstract. ([studylib.net](https://studylib.net/doc/28065259/physrevlett.55.1543?utm_source=openai))
2 Study Type
Experimental observational study reporting the first observation of quantized energy levels in a macroscopic variable (phase difference) of a current-biased Josephson junction in its zero-voltage state. ([journals.aps.org](https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.55.1543?utm_source=openai))
3 Conflicts Of Interest
No conflicts of interest are declared in the accessible abstract or metadata. ([journals.aps.org](https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.55.1543?utm_source=openai))
4 Results Summary
The authors observed quantized energy levels of the phase difference across the junction in the zero-voltage state. The positions of these energy levels quantitatively agreed with quantum mechanical calculations based on junction parameters measured in the classical (thermal) regime. ([journals.aps.org](https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.55.1543?utm_source=openai))