The research performed at the IPhT aims at better understanding the laws which govern our universe and its organisation. It encompasses most of the great subjects of modern theoretical physics:
The IPhT comprises about fifty permanent physicists (2/3 CEA, 1/3 CNRS), about thirty PhD students and postdocs, assisted by a support staff of about ten people. The IPhT also hosts permanently many short term visitors.
Dark Energy and ModifiedGravity cosmologies: DARKMOD from September 11, 2017 to October 6, 2017 The acceleration of the expansion of the Universe at low redshifts has not received a satisfactory theoretical explanation yet. The value of a possible cosmological constant remains a puzzle and alternative approaches, dark energy or modified gravity, are still being developed. In view of the future observations by galaxy surveys, such as EUCLID for instance, it is timely to gather experts on both the theoretical aspects of dark energy and modified gravity, together with phenomenologists and observers. This 4week workshop will provide an opportunity to discuss most aspects of both dark energy and modified gravity, from their theoretical construction to their link with observational cosmology. 

F. David, 20170808

The standard model of particle physics arises in string theory from open strings ending on membranes (Dbranes) extended along the threedimensional space. Closed strings propagating along the whole tendimensional world of string theory play the role of the hidden sector, communicating to the matter sector the breaking of supersymmetry that takes place in the extra dimensions in the form of “soft terms” (which have this name because they break supersymmetry without causing ultraviolet divergences).
However, not any softsupersymmetrybreaking Lagrangian can be obtained this way since the string theory equations of motion and consistency conditions impose relations between the soft couplings. Iosif Bena, Mariana Graña and collaborators have shown that for models realized on D3branes the trace of the square of the boson mass matrix is equal to the trace of the square of the fermion mass matrix at tree level, and this equality holds at least up to two loops [1]. String theory thus dictates ... 

C. Pepin, 20170322

Michel BauerFrançois David


E. Delaborderie, 20170106

¨Le Monde¨ 2016 Research Prize for Rémi Louf
2016 Philippe Meyer Prize in Theoretical Physics for Lenka Zdeborova
2016 Thibaud Prize for Gregory Soyez
Abragam prize of the National Academy of Sciences for Cristina Bena