Energy-level quantization and single-photon control of phase slips in YBa₂Cu₃O_7-x nanowires.

ABSTRACT: Significant progress has been made in superconducting quantum circuits. However new quantum devices that have longer decoherence times at higher temperatures are urgently required for quantum technologies. Superconducting nanowires with quantum phase slips are promising candidates for use in novel quantum devices. Here, we demonstrate YBa₂Cu₃O_7-x nanowires with phase-slip dynamics and study their switching-current statistics at temperatures below 20 K. We apply theoretical models developed for Josephson junctions and show that our results provide strong evidence for energy-level quantization in the nanowires. The crossover temperature to the quantum regime of 12-13 K and the lifetime in the excited state exceeding 20 ms at 5.4 K are superior to those in con

SUBMITTER: Lyatti M 

PROVIDER: S-EPMC7005758 | biostudies-literature | 2020 Feb

REPOSITORIES: biostudies-literature