Quantum Fields & Gravitation
We investigate theories of fundamental interactions that extend beyond the Standard Model of particle physics and classical general relativity. Our work spans approaches to the subnuclear structure of spacetime, including string theory, loop quantum gravity, and random geometry, as well as the study of non-perturbative phenomena in quantum field theory and the exploration of strong gravity physics (astrophysical compact objects and gravitational-wave emissions).
Primary Contact:
Etera LIVINE
Senior Researchers:
Marc GEILLER, Luca LIONNI, Etera LIVINE, Henning SAMTLEBEN
Postdocs:
Jibril BEN ACHOUR, Franz CICERI, Camille ELOY, François RONDEAU, Hugo ROUSSILLE, Yehudi SIMON
PhD Students:
Valentine MARIS (2023-..), Nils MARION (2025-..), Aymeric PROUST (2024-..), Antoine VINCENTI (2024-..)
Mathematical Structures of General Relativity
► Hidden symmetries, Boundary charge algebra, Gravitational memory effects, Reduced models
Supergravity
► Exceptional Geometry, Compactification, Kaluza-Klein spectroscopy
String theory and fundamental interactions
► Holography, AdS/CFT correspondance, Duality symmetries
Loop quantum gravity
► Dynamics, Spinfoam path integrals, Solvable models, Renormalization and Holography
Black Hole physics and quantum cosmology
► Gravitational waves, Tidal deformations, Quasi-normal modes, Fate of singularities
Phenomenology of quantum gravity
► Modified gravity, Non-commutative geometry, Analogue models, Quantum Information
Recent Publications:
- Symmetries of the gravitational scattering in the absence of peeling, arXiv:2407.07978,
by Geiller, Laddha and Zwikel, JHEP 12 (2024) 081 - 2D Ising critical couplings from quantum gravity, arXiv:2405.01253,
by Bonzom and Livine, Phys.Rev.D 111 (2025) 4, 046003 - Holography for the Ishibashi-Kawai-Kitazawa-Tsuchiya Matrix Model, arXiv:2503.08771,
by Ciceri and Samtleben, Phys.Rev.Lett. 135 (2025) 6, 061601 - Free cumulants and freeness for unitarily invariant random tensors, arXiv:2410.00908,
by Collins, Gurau and Lionni
Past early-career researchers: