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

作者：John M. Martinis, Michel Devoret, John L. Clarke · 发表于：Physical Review Letters · 年份：1985 · DOI：10.1103/physrevlett.55.1543 · 被引用次数：382 · 研究领域：Quantum and electron transport phenomena、Physics of Superconductivity and Magnetism、Quantum Information and Cryptography

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.