【摘要】 在约瑟夫森结跳变电流统计分布的理论拟合过程中,通常考虑的是宏观量子隧穿与热激活这两种过程.对Bi2Sr2CaCu2O8+δ表面本征约瑟夫森结的结果分析表明,在宏观量子隧穿与热激活的交界区域内,若考虑量子修正能使实验曲线与理论曲线符合得更好.这种较为完整的拟合方法,对研究本征约瑟夫森器件中的宏观量子现象及其在超导量子比特中的应用具有积极的意义.更多还原

【Abstract】 In the process of theoretical fitting the switching current distributions of Josephson junction,macroscopic quantum tunneling（MQT） and thermally activated process are usually considered.Analysis of the results for a Bi₂Sr₂CaCu₂O₈+δ surface intrinsic Josephson junction（SIJJ）,quantum corrections are considered at the intermediate areas between MQT and thermally activated process.It is found that quantum corrections lead to a perfect fit to the experimental data,which may be useful for the future studies of MQT in SIJJs and their possible applications as a superconducting qubit.更多还原