#France #Quantum Computing #Grenoble #Quobly #FD-SOI

Quobly's Quantum Leap: A Milestone in Computing

Quobly, a pioneering start-up from France, continues to revolutionize the landscape of quantum computing. On December 10, 2024, it announced a pivotal achievement at the International Electron Devices Meeting (IEDM) in San Francisco, showcasing how FD-SOI (Fully-Depleted Silicon-On-Insulator) technology can act as a scalable platform for commercial quantum computing.

The Promise of FD-SOI Technology

The semiconductor industry has long been recognized for its role in the proliferation of conventional computer technology. Quobly aims to harness the same capabilities for quantum computing, utilizing upright silicon spin qubits that provide excellent fault tolerance and scalable performance. The spin qubits are operating at clock speeds in the microsecond range, exhibiting a phenomenal fidelity of over 99% for multiple qubit gate operations, while maintaining incredibly small unit cell dimensions in the range of less than 100 nm².

Quobly's strategy aligns with the fabrication expertise of established semiconductor entities like STMicroelectronics, GlobalFoundries, and Samsung, leveraging decades of infrastructure investment to facilitate the advancement of quantum technology.

Technical Breakthroughs Unveiled

During the IEDM event, Quobly, in collaboration with CEA-Leti, CEA-IRIG, and CNRS, displayed groundbreaking advancements in developing quantum systems. Their focus encompassed the crucial areas of low-temperature operations and thorough characterization of both digital and analog performances. Key achievements included:

• - Single Qubit Operations: Successfully implementing hole and electron spin qubits using the RD pilot line at CEA-Leti. Quobly's ambipolar platform further enhances performance by leveraging the long coherence times of electrons for memory alongside the strong spin-orbit interaction of holes for faster data processing.

• - Charge Control Across Integrated Circuits: They have standardized measurements for two-qubit gates using commercial GF 22FDX technology, extending the control stakes in two-qubit operations.

• - Cryogenic Control Electronics: Establishing significant electronic properties, including a remarkable voltage gain of up to 75dB and extremely low noise levels of 10^-11 V²·μm²/Hz. The consistency of a threshold voltage variability of just 1.29 mV·μm marks an impressive achievement in reliability and fidelity.

• - Ambipolar Spin Qubits: The integration of hole and electron qubits on the FD-SOI substrate produced manipulation speeds of 1μs for holes and achieved 40μs of coherence time for electrons under Hahn echo conditions.

A Future of Scalable Quantum Systems

Quobly aspires to redefine the potential of quantum computing by co-integrating quantum with classical components into a single scalable architecture, known as a Quantum System-on-Chip (QSoC). This visionary approach establishes FD-SOI technology as a crucial element for scalable quantum processors and sets a benchmark for future developments in fault-tolerant quantum computing.

Founded in 2022 in Grenoble, Quobly has swiftly gained acclaim by positioning itself at the forefront of the European quantum sector, following a record investment round of €19 million in 2023.

As quantum technology begins to leave the realm of theoretical exploration and emerges into practical applications, Quobly aims to lead the charge in developing systems capable of housing millions of qubits. With their groundbreaking work, they are not just promising to make quantum computing accessible; they are actualizing it.

For further insights on Quobly and its pioneering technologies, visit www.quobly.io.