Scientists at the Hydrodynamics Laboratory at École Polytechnique (LadHyX*) and the Laboratoire de physique et mécanique des milieux hétérogènes at ESPCI have discovered a new phenomenon that allows fibers to be sorted according to their size in microscopic fluid flows.
Nearly forty teaching and research positions are open for recruitment at École Polytechnique for the 2026 campaign. Ten disciplines are involved, including physics, applied mathematics, and computer science. This is an opportunity to work in a dynamic ecosystem comprising 23 research laboratories and cutting-edge technologies alongside experts from other leading organisations, such as the CNRS, INRIA and INSERM.
Named “AI for Markets and Quantitative Investments” (MaQI), this new master's program complements École Polytechnique's AI training offerings. It aims to help position France as a center of excellence in finance training in the age of AI. The program will begin in September 2026.
École Polytechnique has confirmed its top position in the annual ranking of French engineering schools published by the specialist magazine L’Usine Nouvelle. L’X confirmed its top position in two of the four indicator categories in this ranking: internationalization and the integration of its students into professional life. It also secured first place in research, a category in which it ranked third in 2025.
From middle school to higher education, a variety of support measures can be implemented to encourage and assist women in achieving success in science. On Monday, 26 January, Juliette Toumelin (Head of the Equal Opportunities Division within the Corporate Social Responsibility and Environmental Responsibility Department) and Antigoni Alexandrou (CNRS Research Director at LOB) discussed the mentoring programmes available at École Polytechnique and the Institut Polytechnique de Paris.
Since its creation in 2009, the Mathematical Modelling and Biodiversity Chair (MMB), supported by École Polytechnique and its Foundation, in collaboration with the National Museum of Natural History and supported by Veolia, has been exploring the major challenges of biodiversity at the interface between applied mathematics and ecology. Through interdisciplinary research programmes, scientific meetings and training initiatives, the Chair brings together nearly 150 experts from international laboratories and research institutions to address fundamental questions about population dynamics, evolution and ecosystem resilience.
Nanomaterials are much talked-about, but the methods for making them are still the subject of fundamental research, especially when high temperatures are required. At the Laboratory of Condensed Matter for Physics, a research team is exploring new ways of synthesizing them, using molten salts and lasers.
Nicolas Roche, the Secretary-General for Defence and National Security (SGDSN), spoke to engineering students from the X23 and X24 classes about the latest 'National Strategic Review', which was coordinated by the SGDSN. He emphasised the importance of paragraph 112 of the review, which summarises the central scenario of the French authorities – preparing for war – and encouraged Polytechnique students to play their full part in it.
From spring 2026, École Polytechnique's X-UP incubator will offer honor loans for the deep tech projects it hosts and supports. These honorary loans, supported by École Polytechnique’s Foundation and averaging €40,000 per project, will finance the start-ups' priority operations, leverage other funding, and accelerate the growth of the projects concerned.
Arthur Mensch (X2011), co-founder and CEO of Mistral, the French AI gem, came to meet École Polytechnique students for a talk on entrepreneurship and the implications of AI, two topics which he addressed by echoing his School's motto: “For the Nation, for Sciences, and for Glory.”
After studying science, where she developed a passion for computer science, Manon Blanc completed a PhD at the École Polytechnique's Computer Science Laboratory (LIX*). She has received the Saclay Plateau STIC PhD Prize and the L'Oréal-UNESCO Young Talents Prize. Interview.
Bertrand Bessagnet, a CNRS Research Director affiliated with École Polytechnique, conducted the first study on air quality modeling at such resolution over Bhutan. Using the cutting-edge CHIMERE model, the research study was conducted in collaboration with the International Centre for Integrated Mountain Development and the Jigme Singye Wangchuck Law University in Bhutan. The findings of the research study have now been published.
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