Definitions of artificial intelligence and quantum technologies: A comparative thematic analysis of the strategic documents of 29 European countries

This article provides new insights into the intertwining between technological definitions, sociotechnical futures, and governance trajectories in an increasingly complex geopolitical context. It analyses the definitions of artificial intelligence (AI) and quantum technologies (QTs) that have been adopted by 27 EU member states and two associated countries (Norway and the United Kingdom), and which are contained in their national strategy documents. Drawing on the theoretical framework of sociotechnical imaginaries and employing qualitative thematic analysis, the article shows how these definitions co-constitute narratives that intertwine visions of technological development with governance choices. The lexicon used in definitions is not neutral, and reflects distinct epistemological assumptions and political priorities, thus demonstrating how definitional language acts as a performative tool that legitimizes strategic decisions and aligns collective expectations. AI and QTs are emerging technologies (ETs), characterized by rapid growth, high uncertainty, and potential for significant socio-economic impact, and they are the only two ETs for which most European countries have produced national strategic documents in response to specific requests and coordination efforts by the European Commission. A comparative thematic analysis reveals the relevance of these definitions for national and supranational governance, and indicates that the strategic documents are explicitly oriented toward imagining and shaping specific technological futures that justify increasing public investment in both domains. • National definitions of AI and QT shape sociotechnical imaginaries and governance strategies. • AI definitions emphasize human emulation, machine autonomy, and economic development. • QT definitions stress quantum principles and potential for long-term scientific innovation. • A continuum links abstraction and materiality in national definitions of technology. • Definitions legitimize technological visions and influence governance and public perception.