| Budget Amount *help |
¥24,700,000 (Direct Cost: ¥19,000,000、Indirect Cost: ¥5,700,000)
Fiscal Year 2019: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2018: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2017: ¥7,670,000 (Direct Cost: ¥5,900,000、Indirect Cost: ¥1,770,000)
Fiscal Year 2016: ¥9,880,000 (Direct Cost: ¥7,600,000、Indirect Cost: ¥2,280,000)
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| Outline of Final Research Achievements |
We researched on the quantum metrology triangle experiment, the determination of the elementary charge of an electron and the development of a tiny-current measurement technique. First superconducting hybrid-single-electron device and the semiconductor single-electron device were investigated. In the superconducting hybrid-single-electron device, we found a new mechanism of transfer error and proposed its solution. On the other hand, in silicon device, we succeeded to generate electric current with 5 ppm uncertainty. Next, we built up a measurement setup in a dilution refrigerator for quantum metrology triangle experiment with quantum Hall resistor, Josephson voltage standard, and single electron device. Finally, for the determination of the elementary charge, we succeeded to perform real-time detection of single electron movement inside a semiconductor double quantum dot system.
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