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

The OpenSuperQplus consortium is a structured partnership aiming at large-scale European quantum computers in the superconducting platform. It proposes and implements a set of roadmaps covering the complete technology stack including quantum hardware, enabling hard- and software, engineering, and an application-driven test suite. It will implement and guide two specific grant agreements (SGAs), aiming at 100 and 1000 qubits with high fidelity, respectively. Grown out of the ramp-up project OpenSuperQ, it brings together a community of excellent academic groups, RTOs, and companies of various sizes spread over Europe, and that includes widening countries. Industrial partners allow to commercialize components, enabling technologies as well as full machines. Its scientific focus is on high coherence, which is crucial to reach the break-even point of quantum advantage in NISQ and reaching out to fault tolerance. Beyond the SGAs, OpenSuperQplus will collaborate with many other Flagship projects, contribute to standardization through CEN/CENELEC, and form a sustainable partnership in the form of a professional organization.

The European Microkelvin Platform (EMP) provides access to the ultralow temperature frontier approaching absolute zero. The Platform is continuously evolving by extending its reach, building on the integration achieved through previous infrastructure calls. Europe already has a significant research lead in the microkelvin regime and we will reinforce this by encouraging the further exploitation, in both the shorter and longer term, of ultralow temperatures for the development of new concepts, new applications and new devices, especially in the fields of nanoscience, materials research and quantum technology in all its forms. The EMP is a consortium of 17 partners which provide an extensive portfolio of capacities and expertise in ultralow temperature physics. Since this is a fast evolving and expanding frontier field, we also lay considerable weight on improving and upgrading our infrastructure, since the lowest accessible temperatures are continuously falling. These advances allow us, and our users from across Europe, to study new phenomena, thereby generating new knowledge, applications and commercial opportunities. We have a particular interest in the benefits of ultralow temperature physics for driving forward the inter-related areas of quantum materials, nanoscience, and quantum technology. The activities of the EMP hold enormous potential for innovation. A more extensive description of the Platform and its philosophy can be found in Nature Reviews Materials, The European Microkelvin Platform, Nat. Rev. Mater. 3, 18012 (2018).

OpenSuperQ aims at developing a full-stack quantum computing system of up to 100 qubits and to sustainably make it available at a central site for external users. This system will be applied to tasks of quantum simulation in quantum chemistry which serve as a high-level benchmark, and to problems related to optimization and machine learning. The core of the system will be a processor of superconducting qubits of the planar transmon type, with a square 2D layout and nearest-neighbour connectivity. The processor will be packaged with a control chip and integrated in a custom-made cryogenic system. This quantum computing system will be equipped with integrated control soft- and hardware ready for applications. The computer will be among the leading platforms in the world, and the first of its kind in Europe. A distinguishing and globally unique feature of OpenSuperQ is its open approach ready to serve a large community of users of the system as well as of underlying technologies. The OpenSuperQ consortium works in a collaborative way with broad distribution of tasks and brings together theoretical and experimental teams, a central site including a high-performance computing center, and technology companies. It is supported by an advisory board, a basic science group, and a user board. This broad approach will lead to near-term exploitation, multi-level communication and will develop interfaces and standards made available to the quantum technology community at large.

OpenSuperQplus100 aims at delivering systems and technology for quantum computers based on superconductors. It thus implements the roadmap of the strategic research agenda for the quantum technology flagship as detailed by the OpenSuperQplus framework partnership from which it emerges. It will deliver integrated demonstrators for research and user purposes, one of which will contain at least 100 high-quality qubits. The center piece is a design and fabrication platform for high-quality quantum chips, their environment for multi-chip-modules, and the immediate surroundings of the processors. OpenSuperQplus100 delivers the necessary components and the enabling hard- and software to achieve that goal. This is completed by a test and benchmarking suite, exploring the potential realization of beyond-classical performance in real-world applications. The agenda of OpenSuperQplus100 is looking ahead in developing, testing, and down-selecting technologies that are needed to reach the 1000 qubit level in a subsequent project. The composition of the project with leading companies, RTOs, and academic groups is closely aligned with national agendas which lay the foundation for the OpenSuperQplus100 results. The project contains structured activities in standardization, education, and ethics that will inform larger European discussions. OpenSuperQplus develops structured IP policies and commercialization strategies of its key exploitable results and will serve as a reliable source of information for European stakeholders in industry, academia, politics, and society at large.