Research and Teaching




Carlos Pérez Sánchez


I work on mathematical physics topics motivated by quantum gravity. My research focuses on two of the many existing approaches:

  • random tensor models & random matrix models
  • random noncommutative geometry

I am interested in the relation of these two topics with: non-perturbative quantum field theory, functional renormalization group, topological recursion, large-N limits, free probability, category theory, random matrix theory.


Ph.D. from the Mathematical Institute of the University of Münster, Germany. My advisor was Raimar Wulkenhaar. From 2019 to 2021 I got a postdoc position (adiunkt naukowy) in the group of Piotr Sułkowski at the University of Warsaw. In September 2021 I joined Răzvan Gurău's group at the University of Heidelberg.

My personal homepage can be found here.

Sabine Harribey

I am currently a PhD student at Heidelberg University and Ecole Polytechnique Paris, under the supervision of Razvan Gurau, Dario Benedetti and Christoph Kopper. During the first part of my PhD, I worked in the mathematical physics group at CPHT, Ecole Polytechnique. I am now working in the group of Razvan Gurau at ITP, Heidelberg University.

Before this, I did my Bachelor and Master at Ecole Normale Supérieure in Lyon from where I graduated in 2018. I did my master thesis under the supervision of Dimitrios Tsimpis about the Computation of the four-point amplitude at one-loop order in bosonic string theory.

My research interests are in quantum field theories, renormalization, large-N theories and non-perturbative phenomena. More precisely, the goal of my PhD thesis, entitled Renormalization in tensor field theories and the melonic fixed point, was to study the renormalization group flow of tensor field theories and establish the existence of a new kind of CFT at the fixed point, called melonic CFT. I then focused on studying these melonic CFTs in detail as well as the class of models exhibiting such a melonic fixed point.

My CV can be found here.

Davide Lettera

From 2015 to 2020, I completed my bachelor's and master's degrees in physics at the University of Pisa. During the master thesis I worked under the supervision of Alessando Vichi on A large-N tensor model with four supercharges.

In 2021 I started my PhD under the supervision of Razvan Gurau and Dario Benedetti at the University of Heidelberg, where I am currently working.

My main fields of interest are in Quantum Field Theory, Renormalization, Large-N theories and Conformal Field Theory.

Hannes Keppler

I am a PhD student in the mathematical physics group of Razvan Gurau at the ITP, Heidelberg University. I also did my undergraduate studies in Heidelberg from where I graduated in 2022. During Bachelor and Master I was focusing on theoretical high energy physics, and topology and geometry in physics.

In my master thesis, also supervised by R. Gurau, I studied Duality of Orthogonal and Symplectic Colored Random Tensor Models.

My research interests include: Cominatorics and geometry of random tensor models, as well as methods for Quantum Field Theory beyond perturbation theory, such as Lefschetz-Thimbles and Borel summation.