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The article reports the direct observation of dual Shapiro steps in superconducting NbN nanowires under microwave excitation, a phenomenon linked to the a.c. coherent quantum phase-slip (CQPS) effect. This discovery is significant for advancing quantum metrology standards, as it addresses challenges in observing current steps in superconductors due to material limitations and circuit engineering. The findings demonstrate distinct current steps at frequencies up to 26 GHz, marking a crucial step in understan

Author

Miftah

Language

EN