Activity: Talk or presentation types › Conference presentation
Single-charge pumps have demonstrated to produce a highly accurate quantized current of 160 pA with a relative uncertainty below 0.27 ppm, specifically for applications in quantum metrology. The reported uncertainty mostly dominated by the experimental apparatus, resulting inconveniently long averaging times. To overcome this and systematic errors, in-situ charge sensing is a promising solution. We present our most recent progress on a novel twin aluminium single-electron-transistor charge sensor capacitively coupled to a silicon quantum dot pump. The sensor constitutes an improvement in the detection sensitivity that was the limiting factor of our first generation of designs . The new hybrid device potentially allows us to carry out error counting by combining bidirectional pumping and charge sensing.
13 Mar 2018
DPG-Frühjahrstagung : der Sektion Kondensierte Materie gemeinsam mit der EPS