TheTechno Optimist.

Full-Stack Silicon CMOS Quantum ComputerQuantum Motion—Quantum Motion selected for Stage B of DARPA's Quantum Benchmarking Initiative; one of 11 advancing from initial 18Quantum Motion—Quantum Motion raises $160M Series C led by DCVC and Kembara; UK's best-funded quantum company

Quantum Motion

Silicon spin quantum processors, CMOS-based qubits

GBprivate~120 staffest. 2017quantummotion.tech (opens quantummotion.tech)Checked 10 Oct

The brief

Analyst view
  • Deployed first full-stack silicon CMOS system to UK NQCC (Sept 2025); four-qubit unit cell on 300mm wafers.
  • DARPA QBI Stage B selected (Nov 2025); one of 11 advancing from 18; ~$15M funding for one year.
  • 100x lower cost, 100x less space, 1,000x less power than cryogenic systems; path to millions of qubits.

Technical approach

As reported
CMOS fabrication

Standard foundry process on 300mm wafers

Same process as smartphones and laptops; leverages decades of cost learning.

Quantum dots

Electron spins in silicon dots

Single electrons trapped in potential wells; spin rotations via electric/magnetic fields.

Scaling

Transistor-like scaling to millions of qubits

Thousands of qubits on current wafers; millions as feature sizes shrink.

Manufacturing

GlobalFoundries partnership

Access to cutting-edge nodes and volume manufacturing capability.

Primer