Units

Theoretical Nuclear Physics and Mathematical Physics

The activities of our group are mainly focused in three directions: nuclear, atomic and molecular spectroscopy, nuclear reactions, and mathematical methods in physics. In nuclear spectroscopy, the methods used are essentially microscopic cluster models for light nuclei. An important part of our research concerns exotic nuclei, and halo nuclei. We also address applications in the atomic or molecular framework of the N body problem. Our activities in the field of nuclear reactions cover different topics, such as reactions of astrophysical interest, and breakup reactions. We also provide theoretical support to different experimental groups.
Mathematical methods in non-relativistic and relativistic quantum mechanics concern the application in microscopic physics of group theory and Lie algebras. They also concern the use of supersymmetry in the inverse problem of collisions.  In addition, we develop numerical methods for the study of quantum N-body systems.  One aspect of our research also concerns the links between classical mechanics and quantum mechanics.

Theoretical and mathematical physics

The research unit is interested in the theoretical and mathematical description of the fundamental interactions. In particular we are interested in Einstein's theory of gravity (e.g. black holes and theoretical cosmology), in its possible extensions to dimensions different than four and, eventually, in the study of a consistent theory of quantum gravity. These efforts lead naturally to models such as string theory, where all interaction are unified. In this context, we use and develop novel techniques in quantum field theory (e.g. renormalization and anomalies) and in supersymmetry. Another problem is the one of non perturbative aspects of gauge theories (supersymmetric or not), which should explain the origin of mass and confinement in QCD.

Projetcs

Modeling of gaseous quantum detectors

Gaseous ionizing particle detectors (cloud chambers, track chambers ...) are modeled in an ab initio approach combining quantum scattering theory and statistical physics. The goal is to address both the fundamental problems of quantum measurement (decoherence, determinism, influence of the microscopic state of the measurement apparatus ...) and to participate in the optimization of new active target type detectors. used in low energy nuclear physics.

Nuclear spectroscopy and reactions : theory and applications. - Mathematical methods in Physics

Expertise in the methods for low energy nuclear physics : Theoretical developments : multi-cluster microscopic models in the Generator Coordinate Method and the R-matrix approach ; calculations based on mesh methods,- Applications : nuclear reactions with stable and radioactive ions, some of astrophysical interest; exotic nuclear states : light nuclei with neutron '' halo'', neutron rich nuclei at the limit of the nuclear stability - Mathematical methods in non-relativistic quantum mechanics : - applications in the microscopic approaches of physical problems of groups theory and Lie algebra, so as of their deformations known as quantal groups and algebra ; study of the inverse problem with supersymmetric transformations and applications to nuclear and atomic systems.