The QLSI2 FPA proposal consists of 23 partners from 9 different countries, with one of the partners under associated country ownership. By integrating the QLSI2 consortium into the global European quantum ecosystem of complementary European and national consortia, a strong synergistic European partnership will be established with the ambition to demonstrate a cloud-accessible full-stack quantum computer with at least 1000 semiconductor-based qubits by 2029. The QLSI2 partners will leverage the expertise of key European players (RTOs, academic laboratories, start-ups and large companies) in complementary fields of quantum technologies, from hardware to software, to define and implement a roadmap towards such an ambitious goal. The roadmap will extend its vision to the entire value chain, including the supply chain. Particular attention will be paid to the industrialisability of the proposed solution in order to keep Europe at the forefront of the race for quantum supremacy for a long time to come. The roadmap will be implemented in the Specific Grant Agreements (SGA) that will be awarded under the FPA upon its successful completion. In addition to demonstrating large-scale semiconductor-based quantum computers, these SGA will aim to advance both technology and manufacturing readiness to a level high enough to meet Europe's ambitions for its quantum computing capability.

At Quobly, we are charting a realistic path toward large-scale quantum computers using our proven semiconductor manufacturing processes. Our solution addresses the critical need for a new computing paradigm in the face of rapidly advancing artificial intelligence and big data technologies. We have developed silicon spin qubits with integrated on-chip control electronics, implemented on CMOS FD-SOI technology. Our ground breaking innovation, protected by 40 patents, is the result of two decades of rigorous European research and development. Our methodology involves modifying only 10% of standard semiconductor fabrication processes, enabling us to leverage existing infrastructure for the efficient and cost-effective production of quantum processors. We have already achieved significant milestones, including the successful demonstration of one and two-qubit gates, the fabrication of four-qubit chips, and the seamless transfer of processes from our pilot line to a commercial foundry. We have set ambitious targets in our development roadmap, aiming to demonstrate a 100 physical qubit chip by 2027 and a 1000 logical qubit chip by 2030. These advancements will facilitate real-world applications of quantum computing in medical research, drug discovery, mobility optimization, energy management, and other fields critical to Europe's technological sovereignty and economic competitiveness. Quantum computing offers a once-in-a-generation opportunity for Europe to leap ahead in the global tech race. With EIC Accelerator support, we will ensure that the next wave of world-changing innovations will be made in Europe

QLSI2 brings together the expertise of 23 partners from 9 countries with the ambition to demonstrate a cloud-accessible 200-qubit semiconductor-based quantum computer by the end of 2027. In addition, the consortium aims to demonstrate the implementation of meaningful use cases on this demonstrator. The QLSI2 project will leverage the expertise of key European players (RTOs, academic laboratories, start-ups and large companies) in complementary fields of quantum technologies, from hardware to software, to define and implement a roadmap towards such an ambitious goal. The roadmap will extend its vision to the entire value chain, including the supply chain. Particular attention will be paid to the industrialisability of the proposed solution in order to keep Europe at the forefront of the race for quantum supremacy for a long time to come. The roadmap will be implemented considering both heterostructure-based and FD-SOI-based routes. In addition, and following these two routes, QLSI2 aims to advance both technology and manufacturing readiness to a level high enough to meet Europe's ambitions for the industrialisation of quantum technologies, with a particular focus on scalability. With these overall objectives and expected outcomes, QLSI2 will have a significant impact on the field towards LSQ.

Silicon technology was the key to transforming classical computing into a massive industry. Could it play a similar role in quantum computing? Silicon qubits have several attractive features and can rely on a mature industry that has already mastered the intricacies of scaling. However, while scientific advances in silicon qubit technology have been encouraging, progress has been modest on the commercial front. This is the consequence of a rift between the techniques of the semiconductor industry and the requirements of quantum computers. At Siquance, we close this gap thanks to a ground-breaking semiconductor approach: Fully Depleted Silicon On Insulator (FDSOI) technology. FDSOI technology enables the fabrication of high-quality qubits in a scalable and reproducible manner. Now, we advance these developments to the market. This project aims at delivering an FDSOI-based quantum processor demonstrator with a novel 4X4 multi-core architecture.

The rise of quantum technology has opened the eyes of the ICT industry with respect to cryogenics. It is considered an enabler bringing in quantum functionalities and enhanced system performance and we are observing a massive growth of cryogenics from coolers to cryogenic electronics and photonics. ArCTIC is a joint effort of top European RTOs, industrial fabrication facilities, and leading application partners (23 industrial among which 14 SMEs, 7 RTO, 6 academic), sharing the vision to take a joint EU step towards the era of cryogenic classical and quantum microsystems. We aim to close the gap between qubit research and interfacing control machinery, highly needed for scaled-up quantum systems. The main goal of ArCTIC is to develop scalable cryogenic ICT microsystems and control technology for quantum processors. The technologies developed will have applications in many fields from sensing to communication, leading to important cross-fertilization that will strengthen the forming European ecosystem on cryogenic classical and quantum microsystems. ArCTIC will advance semiconductor technologies and materials, and tailor these for QT requirements and cryogenic applications. Multi-scale physics and data-driven models, cryogenic PDK modelling, device characterization, circuit design activities will support the development of cryogenic microelectronics. We will develop quantum processor platforms and broaden the applicability of microelectronic devices and circuits for cryogenic operation by developing cryo-compatible ultra-low loss substrates and thin-films, microelectronic and photonic circuits, semiconductor packaging and heterogeneous-integration techniques and benchmark the developed technologies. Scientific and Industrial ArCTIC-demonstrators and applications are driving our developments enabling the European industry to maintain and expand its leading edge in semiconductor components and processes and QT and strengthen sustainable manufacturing technologies