Energy-Level Quantization in the Zero-Voltage State of a Current-Biased Josephson Junction

descriptionPublicationkeyboard_double_arrow_right Article 07 Oct 1985 English Publisher:American Physical Society (APS)Journal:Physical Review Letters, volume 55, pages 1,543-1,546 (issn: 0031-9007,

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Authors: , Martinis; , Devoret; , Clarke;

doi: 10.1103/physrevlett.55.1543

pmid: 10031852

Energy-Level Quantization in the Zero-Voltage State of a Current-Biased Josephson Junction

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Abstract

We report the first observation of quantized energy levels for a macroscopic variable, namely the phase difference across a current-biased Josephson junction in its zero-voltage state. The position of these energy levels is in quantitative agreement with a quantum mechanical calculation based on parameters of the junction that are measured in the classical regime.

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