Single electron pumps: towards a quantum representation of the ampere

Details Single electron pumps: towards a quantum representation of the ampere Single electron pumps: towards a quantum representation of the ampere

2012-01-12

arxiv.org/abs/1201.2533v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 3 figures

Scientific paper

Electron pumps generate a macroscopic electric current by controlled manipulation of single electrons. Despite intensive research towards a quantum current standard over the last 25 years, making a fast and accurate quantised electron pump has proved extremely difficult. In this article we demonstrate that the accuracy of a semiconductor quantum dot pump can be dramatically improved by using specially designed gate drive waveforms. Our pump can generate a current of up to 150 pA, corresponding to almost a billion electrons per second, with an experimentally demonstrated current accuracy better than 1.2 parts per million (ppm) and strong evidence, based on fitting data to a model, that the true accuracy is approaching 0.01 ppm. This type of pump is a promising candidate for further development as a realisation of the SI base unit ampere, following a re-definition of the ampere in terms of a fixed value of the elementary charge.

Affiliated with

Also associated with

No associations

Rating

Single electron pumps: towards a quantum representation of the ampere does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Single electron pumps: towards a quantum representation of the ampere, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Single electron pumps: towards a quantum representation of the ampere will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-152019