Welcome to the homepage of
Sébastien Leurent
prenom.nom@nsup.org
Research interest
My main research works belong to theoretical physics (using algebraic and analytic tools to study specific quantum models, which play a role in particle physics for instance, and are related to the crucial challenge of quantum gravity).
More precisely, I'm interesetd in the AdS/CFT duality, which relates a 4-dimentional field theory (called N=4 Super Yang-Mills) and a string theory on the curved space AdS5xS5. It maps the strong coupling regime of one theory to weak coupling regime of its dual theory (the only regime where computation tools are generically available, in the form of perturbative series).
This property (that a perturbative regime is dual to a strong coupling regime) make this duality all the more usefull, but also the harder to check, making it necessary to use powerful mathematic tools, such as the integrability (which I have been studying).
Up to now, I have worked on the integrability of spin chans, but also for the spectrum of fields theories (expressed by means of a Thermodynamic Bethe Ansatz, under the form of a "Y-system"). More specifically, a universal object called Q-operator, was an impressive tool for my work on these subjects.
While continuing these works, I have recently started to shift topics, having in mind to undertsand better the environnemental crisis we are entereing, and to do research that would have a chance to contribute to changes that woul limit this crisis or let us adapt.
This shift in research subject is in progress, and to the present day I participate in works of modelisation of ecosystems (with finite automata with large number of states), and am also intgerested in works is social sciences (in particular economics).