Dependence of Switching Current Distribution of a Current-Biased Josephson Junction on Microwave Frequency

被引：2

作者：

Zhai Ji-Quan ^{[1
]}

Li Yong-Chao ^{[1
]}

Shi Jian-Xin ^{[1
]}

Zhou Yu ^{[1
]}

Li Xiao-Hu ^{[1
]}

Xu Wei-Wei ^{[1
]}

Sun Guo-Zhu ^{[1
]}

Wu Pei-Heng ^{[1
]}

机构：

[1] Nanjing Univ, Sch Elect Sci & Engn, Res Inst Superconductor Elect, Nanjing 210093, Jiangsu, Peoples R China

来源：

CHINESE PHYSICS LETTERS | 2015年 / 32卷 / 04期

基金：

高等学校博士学科点专项科研基金; 中国国家自然科学基金;

关键词：

ZERO-VOLTAGE STATE; ENERGY-LEVEL QUANTIZATION; MACROSCOPIC QUANTUM STATES; TUNNEL-JUNCTIONS; QUBIT APPLICATION; FABRICATION; DISSIPATION; LIFETIME; FIELD;

D O I：

10.1088/0256-307X/32/4/047402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate the distribution of the switching current of a current-biased Josephson junction (CBJJ) and its dependence on the microwave frequency using two theoretical methods, one of which is the quantum trajectory method and the other is the master equation method. Both the methods show that the distribution of the switching current of CBJJ will exhibit double peaks in a certain range of microwave frequency if proper microwave power is given, and the gap between the two peaks will increase with the microwave frequency. The obtained results can be used to identify the energy difference of the ground and first excited states in a Josephson junction for any bias current.

引用

页数：4

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