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Updated: Mar 30, 2026

Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping

Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping

Published on: June 3, 2015

Silicon quantum dots: fine-tuning to maturity.

Andrea Morello¹

¹Centre for Quantum Computation and Communication Technology School of Electrical Engineering and Telecommunications UNSW Australia, Sydney NSW 2052, Australia.

|November 21, 2015

Summary

Researchers developed a new silicon/silicon-germanium double quantum dot device for quantum computation. This fabrication breakthrough offers highly tunable quantum dots in silicon, advancing quantum information science.

Area of Science:

Quantum physics
Nanotechnology
Materials science

Background:

Semiconductor heterostructures with quantum dots are key for nanoscale quantum phenomena research.
Quantum computation demands highly tunable quantum dots in spin-free materials like silicon.

Purpose of the Study:

To report the fabrication of a novel Si/SiGe double quantum dot device.
To achieve tight confining potentials and exquisite tunability in silicon quantum dots.

Main Methods:

Fabrication of an ultra-low disorder Si/SiGe accumulation-mode heterostructure.
Integration of a stack of overlapping control gates for precise potential control.

Main Results:

Successful fabrication of a novel Si/SiGe double quantum dot device.

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Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping

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Demonstration of tight confinement and high tunability of quantum dots.

Conclusions:

The developed Si/SiGe double quantum dot device shows technological maturity for silicon quantum dots.
This advancement prepares silicon quantum dots for applications in quantum information science.