Figure 6: Summary of experimentally demonstrated pump accuracy.
From: Towards a quantum representation of the ampere using single electron pumps
Fractional deviation of pump current from ef in p.p.m., averaged from seven experimental runs on sample 1 at 400 MHz, sine (open circles), 630 MHz, sine (open squares) and 945 MHz, AWG (closed circles), and one experimental run on sample 2 at 630 MHz, AWG (closed diamond). Error bars show the total uncertainty UT. The data point marked with a * was measured with VG1 shifted by 10 mV away from the plateau centre.
