Since Nov. 2021:  Senior Researcher (Directeur de Recherche 2 CNRS).

Previous positions:  see my Inspire profile or my ORCID profile. 

I work at the interface between string theory and cosmology. On the one hand, string theory is a candidate for a fundamental theory of Nature, providing a unified description of all known forces (electromagnetic, nuclear, and gravity) in a single framework. But string theory contains as well ingredients that are not observed in our world, such extra space dimensions, or scalar fields (that can give rise to new particles, of the same kind as the Higgs boson); we need to find an explanation for these unobserved extra constituents. On the other hand, cosmology describes the history of our universe, from a poorly understood start (sometimes called the "big bang") 13.8 billion years ago, until today. Through theoretical models, cosmology can also predict its future.

In my work, I try to relate string theory, and its extra ingredients, to cosmological models, and ingredients of the latter that are not understood. Among those, dark energy is a contribution responsible for the accelerated expansion of our universe, a phenomenon that we observe. This expansion has been accelerating since about 5 billion years, and the nature of dark energy, that is driving it, is not like anything we know. The extra dimensions of string theory and what they contain, as well as the extra scalar fields, could provide an origin and an explanation for dark energy. I am trying to establish such a relation, but also to understand the possible limitations of string theory in that respect.

Here is a link to my publications.

18 Sep. 2024:  Attempts on de Sitter and quintessence from string theory, AES3L Workshop, IFT, Madrid, Spain.

03 Jul. 2023:    Scalar potentials from (classical) string theory, String Phenomenology 2023, IBS, Daejeon, South Korea.

13 Mar. 2023: String theory scalar potentials and their critical points, seminar at Harvard University, Boston, USA.

06 Jul. 2022:   The landscape of 4d (anti-) de Sitter and Minkowski solutions of 10d supergravities, String Phenomenology 2022, Liverpool Univ., U.K.

08 Nov. 2021: Stability no-go theorems for classical de Sitter solutions, Geometry, Strings and the Swampland, Ringberg Castle, Tegernsee, Germany

Since Jan. 2024:  Lecturer of Introduction to String Theory for Master (M2) at ENS Lyon.

Since 2021:  Supervision of 2 Ph.D. thesis.

10 - 12 Dec. 2025:  Co-organiser of the Strings & Cosmology Meeting, LAPTh, Annecy.

03 - 07 Jun. 2024:  Co-organiser of the conference Strings 2024, CERN, Geneva  (article about it).

10 - 11 Apr. 2024:  Organiser of the AnLy Meeting in honor of Anamaria Font, LAPTh, Annecy.

28 Nov. 2023:         Co-organiser of the String - Cosmo Day, APC, Paris.

23 - 25 May 2023:  Co-organiser of the workshop French Strings Meeting 2023, LAPTh, Annecy.

14 Oct. 2022:           Co-organiser of the workshop Strings and Quantum Gravity in the Alps, LAPTh, Annecy.

Since Nov. 2021:    Main organiser of Anly Strings & Fields: joint Annecy - Lyon seminars and workshops.

Since Nov. 2021:    Co-organiser of the Journal Club, LAPTh, Annecy.

Since Nov. 2023:  Member of the Conseil National des Universités (CNU), section 29, France.

Since Nov. 2022:  LAPTh CNRS deputy for sustainability.

Since Nov. 2021:  Member of 4 Ph.D. defense committees.

Sep. 2024:  Interview for the article La théorie du tout in the magazine Epsiloon.

May 2017:  Interviews about a publication of mine in New Scientist, Frankfurter Rundschau.

Credits LAPTh