ABOUT PROJECT SCALLOP

Project duration: 09/2023 – 08/2026

Scaling quantum computers from laboratory systems to large-scale, fault-tolerant machines remains one of the biggest challenges in the field, and a necessary step before they can deliver real-world impact.

The SCALLOP  project addresses this challenge by combining a cryo-optimized CMOS multiplexer with scalable readout electronics, enabling precise control of high-quality silicon spin qubits.

The goal of the project is to develop and validate the core hardware components required for a scalable, full-stack quantum computer. SemiQon contributes the qubit and multiplexer technology, while Qblox brings extensive experience in gate-model quantum computing characterization and control. Together, this work marks a significant step towards quantum computers that can scale to the qubit counts real applications demand.

The project team brings together complementary expertise: fabrication of semiconductor quantum devices in a pilot line environment, characterization at both room and cryogenic temperatures, and control and automation of qubit measurements.

An illustration showing how SemiQon hardward and software communicates

PROJECT work packages

PUBLICATIONS

Publications

  • N. Yurttagül et al., "Millikelvin Si-MOSFETs for quantum electronics," Applied Physics Letters (2026). DOI: 10.1063/5.0322860
  • N. Yurttagül, "Millikelvin-CMOS for Quantum Integrated Circuits," 2026 IEEE/JSAP Symposium on VLSI Technology and Circuits, Honolulu, June 2026. Abstract
  • J. Lehtinen, "Low Subthreshold Swing Cryo-CMOS for Ultra-Low-Power Cryo Electronics," WOLTE 2026, Giardini Naxos, June 2026. Abstract booklet
  • N. Yurttagül, "Scalable Millikelvin Control of Packaged Quantum Integrated Circuits," APS Global Physics Summit, Denver, March 2026. Abstract
  • N. Yurttagül, "Millikelvin CMOS-technology for quantum electronics," APS Global Physics Summit, Anaheim, March 2025. Abstract

ABOUT SEMIQON

SemiQon’s mission is to realize the promise of quantum computing by delivering scalability through powerful, resilient, and cost-effective silicon-based quantum hardware. Its technology builds upon decades of development and know-how from the semiconductor industry, making its cryo-optimized CMOS electronics commercially competitive and well-suited for mass-manufacturing. SemiQon’s first-in-the-world cryo-optimized CMOS delivers scalability and power efficiency to wide-ranging applications in quantum, space, and beyond.

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Close-up view of a Qblox modular hardware system with illuminated control and readout panels and connected ports.

ABOUT QBLOX

Qblox operates at the frontier of the quantum revolution, supporting academic laboratories worldwide. This is made possible by our passionate, dynamic and diverse team. With a dedicated team of scientists, engineers and developers we are pushing quantum technology to support scientists and institutions worldwide with our scalable and low-latency qubit control equipment.

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