Cryogenic systems are a cornerstone of quantum technologies, enabling the ultra-low temperatures required for the operation of quantum computers, sensors, and communication devices. As quantum technologies advance, developing high-performance, scalable, and sovereign cryogenic solutions has become strategic and a priority for many stakeholders. Led by the CEA and the CNRS, CRYONEXT is part of France’s acceleration national strategy for quantum technologies. Its goal is to secure France’s and Europe’s access to High-Performance cutting-edge cryogenic systems tailored for quantum applications. The program comprises six R&D projects, specific studies, and an analysis of the international market for technologies, patents, and foreign programs in the field of quantum technology. Each project is addressing distinct temperature ranges and applications and cover: Cryostat farms and new architectures for scaling up quantum computers, 1.5 K–5 K optimized cryogenics for photonics; high-power 500 mK optimized cryogenics for quantum semiconductors; 20 K–80 K optimized cryogenics for communication and quantum sensors, innovative magnetic refrigeration with modular and compact cooling solutions capable of reaching millikelvin and sub-millikelvin temperatures and = innovative and sovereign millikelvin thermometry. They are developed via unique public-private consortia, involving more than 15 partners composed of industrial leaders, startups, and research institutes. After briefly recalling the program organization, we report the main progress achieved over the last few years, which includes the validation of the R&D roadmaps dedicated to supporting these six R&D projects. Lastly, we briefly review the efforts of ongoing R&D projects that have entered their execution phase, encompassing both component and system levels, and present an update on the selected specific studies and the analysis of the international quantum technology field cartography.
We gratefully acknowledge contributions from Simon Crispel (Air Liquide Advanced Technologies), Laurent Petit (RADIALL), Ioanna Kriekouki (VIQTHOR), Davide Duri (CEA, DRF/DSBT), Luc Ronayette (LNCMI), Johan Guilhot (Institut Néel), Mathieu Davaine (ABSOLUT SYSTEM), Jean-Luc Polleux (ICON PHOTONICS), Perrine Berger (THALES RESEARCH & TECHNOLOGY), Richard Hostein (MYCRYOFIRM/PASQAL), Thomas Prouvé (CEA, IRIG/DSBT), Thierry Chanelière (Institut Néel), Jean Etesse (INPHYNI), Anne Louchet-Chauvet (Institut Langevin), Pierre Verlot (LuMIn), Brahim Lounis (LP2N), Philippe Camus (Institut Néel), Xavier Thibault (QUOBLY), Juan Trastoy (THALES RESEARCH & TECHNOLOGY), Véronique Pugliese (THALES LAS FRANCE), Ivan Charles (CEA, IRIG/DSBT), Lucas Méthivier (CEA, IRIG/DSBT), Fernando Sparasci (Le Cnam), Jean-Marc Duval (CEA, IRIG/DSBT), Sébastien Triqueneaux (Institut Néel), Axel Halet (Seico), Anthony Attard (CEA, IRIG/DSBT), Olivier Bourgeois (Institut Néel), Claire Marrache (IJCLab).

This work was supported by the French National Research Agency (ANR) under the France 2030 program, with the grant ref. ANR-24-CRYO-0001.