Quobly announces key milestone for fault-tolerant quantum computing

GRENOBLE,France and SAN FRANCISCO,Dec. 10,2024 -- Quobly,a leading French quantum computing startup,has reported that FD-SOI technology can serve as a scalable platform for commercial quantum computing,leveraging traditional semiconductor manufacturing fabs and CEA-Leti's R&D pilot line.

Quobly device based on FD-SOI undergoing testing & measurements

The semiconductor industry has played a pivotal role in enabling classical computers to scale at cost; it has the same transformative potential for quantum computers,making them commercially scalable and cost competitive. Silicon spin qubits are excellent for achieving fault-tolerant,large-scale quantum computing,registering clock speeds in the µsec range,fidelity above 99% for one and two-qubit gate operations and incomparably small unit cell sizes (in the hundredths of 100nm²).

To capitalize on decades of semiconductor infrastructure investments,Quobly has adopted a fabless model. It focuses on FD-SOI,a commercially available CMOS technology manufactured by global leaders like STMicroelectronics,GlobalFoundries,and Samsung,as a platform for quantum computing.

Quobly's work,reported on December 9th,2024 at IEDM,addresses the critical challenges for scaling quantum systems. With CEA-Leti,CEA-IRIG and CNRS,Quobly has demonstrated the key building blocks for a quantum computer leveraging commercial FD-SOI:

Low-temperature operations and characterization of their digital and analog performances,adhering to circuit design guidelines

Singlequbit operations using hole and electron spin qubits using the CEA-Leti's R&D pilot line. This ambipolar platform optimizes system performance,leveraging electrons' long coherence times for memory,as well as the holes' strong spin-orbit interaction for fast data processing

Charge control in commercialGF 22FDX to further define a standard cell for a two-qubit gate

Key achievements include:

Cryogenic Control Electronics:Voltage gain up to 75dB,noise levels of 10-11V²∙μm²/Hz,and threshold voltage variability of 1.29mV∙μm.

Ambipolar Spin Qubits: Co-integration of hole and electron qubits on FD-SOI technology,achieving 1μs manipulation speed for holes and 40μs coherence time (Hahn echo) for electrons.

Two-Qubit Gate Standard Cell: Demonstration of double quantum dot operations with commercial FD-SOI.A Step Towards Commercial Quantum Systems

This work positions FD-SOI as essential for scalable quantum processors and establishes Quobly as a leader in cost-efficient,fault-tolerant quantum computing. By co-integrating quantum and classical components on the same platform,Quobly is shaping scalable QSoC architectures.

About Quobly

Founded in 2022 in Grenoble,Quobly pioneers fault-tolerant quantum computing with semiconductor qubits. Combining cutting-edge research with industrial production,Quobly targets scalable systems with millions of qubits. The company raised €19 million in 2023,setting a European quantum sector record. Visit www.quobly.io.

Contact: [email protected]