| 约瑟夫森结跳变电流统计分布测量系统 |
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| 引用本文： | 王颖,许伟伟,孙国柱,陈健,曹俊宇,丛山桦,吴培亨.约瑟夫森结跳变电流统计分布测量系统[J].电子学报,2007,35(5):823-826. |
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| 作者姓名： | 王颖 许伟伟 孙国柱 陈健 曹俊宇 丛山桦 吴培亨 |
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| 作者单位： | 南京大学电子科学与工程系超导电子学研究所,江苏南京 210093 |
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| 基金项目： | 国家自然科学基金，国家高技术研究发展计划(863计划)，高等学校博士学科点专项科研项目，国防重点实验室基金 |
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| 摘 要： | 本文详细介绍了一种通过对时间的测量来获得单个约瑟夫森结(JJ)跳变电流统计分布P(I)的测量系统,包括致冷系统和测量方案.我们还在测量电路中采取了电磁屏蔽、低通滤波、接地等一系列的降噪措施,使得实验所能测量到的约瑟夫森结的最低等效温度进一步的降低至300mK.
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| 关 键 词： | 约瑟夫森结 超导 超导量子比特 降噪 |
| 文章编号： | 0372-2112（2007）05-0823-04 |
| 收稿时间： | 2006-09-25 |
| 修稿时间： | 2006-09-252007-03-05 |
The Measurement System of Statistical Distribution of the Switching Current of a Single Josephson Junction |
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| WANG Ying,XU Wei-wei,SUN Guo-zhu,CHEN Jian,CAO Jun-yu,CONG Shan-hua,WU Pei-heng.The Measurement System of Statistical Distribution of the Switching Current of a Single Josephson Junction[J].Acta Electronica Sinica,2007,35(5):823-826. |
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| Authors: | WANG Ying XU Wei-wei SUN Guo-zhu CHEN Jian CAO Jun-yu CONG Shan-hua WU Pei-heng |
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| Affiliation: | Research Institute of Superconductor Electronics,Department of Electronic Science and Engineering,Nanjing University,Nanjing,Jiangsu 210093,China |
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| Abstract: | A system,which measures the statistical distribution of the switching current of a single Josephson junction(JJ) based on time-resolved measurement,is introduced.This system includes both the refrigeration system and the measurement method.Moreover,we tried several techniques to reduce the noise,such as electromagnetic shielding,low-pass filter and ground connection,and the lowest equivalent temperature of JJ in the experiment was reduced to 300mK. |
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| Keywords: | Josephson junction superconductor superconducting qubit noise reduction |
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