IPhT

Les astrophysiciens ont démontré l'existence de la matière noire : cinq fois plus abondante que la matière ordinaire, elle joue un rôle clé dans l'histoire de l'Univers et la formation des galaxies. Mais ils ignorent sa nature : s'agit-il de particules élémentaires inconnues ou de trous noirs « exotiques » ? En effet, les trous noirs formés à partir d'étoiles massives en fin de vie ne suffisent pas à rendre compte de toute la matière noire.

Des théoriciens ont donc invoqué l'existence de trous noirs « primordiaux », formés dans l'Univers jeune, dont ils ne savent que peu de choses...

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We are happy to learn that Michel Gaudin has been awarded the 2019 Dannie Heineman Prize for Mathematical Physics, together with Bill Sutherland (U. of Utah) and F. Calogero (U. di Roma La Sapienza), for their "... profound contributions to the field of exactly solvable models in statistical mechanics and many body physics, in particular the construction of the widely studied Gaudin magnet and the Calogero-Sutherland, Shastry-Sutherland, and Calogero-Moser models."

This prize was established in 1959 by the Heineman Foundation for Research, Educational, Charitable, and Scientific Purposes, Inc., and is administered jointly by the American Physical Society and the American Institute of Physics. It recognizes outstanding publications in the field of mathematical physics.

Michel Gaudin entered CEA in 1956 and is one of the "grands anciens" of what is now IPhT. His early and pioneering contributions in random matrix theory and the Bethe ansatz method applied to quantum spin sytems, and his book "La fonction d'onde de Bethe" (although translated in English only 30 years after its first publication in French) have made him famous.

For more information, look at the APS prize recipient site and at the D. Heideman Prize APS site.

One may also read again for the occasion a text (in french) by Michel Gaudin written when he retired.

Bertrand Eynard (IPhT) has been awarded an ERC Synergy grant, "Recursive and Exact New Quantum Theory", together with J.E. Andersen (QGM, Aarhus University, DK), B. Eynard (IPhT), Mr. Kontsevich (IHES, Bures-sur-Yvette) and M. Mariño (UNIGE, Geneva, CH). Two other IPhT researchers are involved in this project.

The Synergy Grants aim to establish collaborations between several researchers in different institutes on a common program. The goal of the ReNewQuantun program is to build new foundations for quantum field theory, beyond perturbation theory, by using advanced geometric and topological methods (topological recursion, geometric recursion, resurgence theory, non-linear Riemann-Hilbert methods, Fukaya categories, topological string theories, mirror symmetry, etc.).

This program should open new avenues for exploring the relations between gravitation and quantum mechanics, and for incorporating it into unified theories of fundamental interactions. ...