Single-electron quantum optics for quantum-enhanced measurements

Short Name: SEQUOIA, Project Number: 17FUN04
Image of overlapping waves of different frequencies
Abstract, overlapping waves of different frequencies

Developing new measurement techniques to support the development of semiconductor quantum technology.

In the quantum world, electrons can exhibit wave-like properties, and this behaviour is being exploited in new technologies based on developments in the field of single-electron quantum optics. Fabricated from semiconductor materials, these novel devices will include applications such as electromagnetic field sensing.

The challenge is to develop components that harness the wave-like nature of single electrons, understand their quantum behaviour, and create the tools needed for device characterisation.


This project has fabricated semiconductor-based devices exploiting quantum properties of individual electrons for innovative sensors and other components, such as on-demand single electron sources. The methods needed to characterise the electrons’ so-called quantum states were also developed.

For electric and magnetic field detection, a new sensing technique was used to demonstrate high spatial and time resolution (~ 1 µm and ~ 1 ns or below, respectively).

Both practical and theoretical results from the project will be used to promote the uptake of single-electron wave packet devices, and the associated measurement techniques, to characterise their performance.


Project website
Quantum tomography of electrical currents

Nature Communications

Other Participants
Centre National de la Recherche Scientifique (France)
Commissariat à l'énergie atomique et aux énergies alternatives (France)
Latvijas Universitate (Latvia)