Résumé / Abstract Journal-club_Doctorants

Journal-club Doctorants / Journal-club PhD students

« From particle physics to quantum gravity, a pedagogical introduction »

Erwan Allys

Quantum gravity remaining one of the foremost challenge of theoretical physics, some of its central aspects are still unfamiliar for many physicists. We will give in this talk an introduction to the main features of the research of such a theory. In a first part, we will discuss how interactions are quantized in quantum field theory. Introducing the concept of symmetries in particle physics, it will also allows us to review its Standard Model, which is very well tested in terrestrial accelerators. Switching to the quantification of the gravitational interaction, we will discuss why the particle physics methods do not work anymore for this fourth interaction. We will conclude by giving a brief overview of two currents candidates as a theory of quantum gravity, i.e. string theory and quantum loop gravity.
During the whole talk, we will stay at an introductory level, focusing on the concepts rather than on the mathematical formulations. I hope it will be the occasion for those who are not familiar with this domain to answer questions like: what are symmetries in particle physics ? why can't we renormalize quantum gravity ? why is there so many dimensions in string theory ? what are the loops of quantum loop gravity ? etc.
mercredi 2 novembre 2016 - 17:00
Salle Entresol Daniel Chalonge, Institut d'Astrophysique
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