Missions

The recent surge of experimental data from the Large Hadron Collider (LHC) and the new generation of gravitational-wave detectors offers an unprecedented opportunity to test the Standard Model of particle physics and Einstein's theory of gravity. Achieving this goal requires powerful methods to obtain high-precision theoretical predictions for the relevant observables.
The main objective of this postdoctoral position is to advance the frontier of precision calculations in theoretical physics. In particular, the successful candidate will:
- Develop novel methods for computing multi-loop, high-multiplicity scattering amplitudes and Feynman integrals.
- Perform high-precision calculations of observables in QCD, supersymmetric gauge theories, and classical and quantum gravity.
- Explore hidden analytic and algebraic structures of physical observables using modern theoretical and mathematical techniques.

Activités

- Conduct original research within the framework of the ANR project Observables.
- Prepare and publish scientific papers in leading international journals.
- Present research results at international workshops and conferences.
- Actively participate in collaborations with the project's partner institutions.
The research will be carried out in close collaboration with Dr. Dmitrii Chicherin (LAPTh, Annecy), within the Observables project.

Compétences

- Solid knowledge of quantum field theory and modern approaches to perturbative scattering amplitudes.
- Practical experience with Feynman integral computation techniques.
- Familiarity with computer algebra systems used in theoretical physics.
- Ability to work both independently and collaboratively within an international research environment.
- Initiative, scientific rigor, and commitment to high-quality research.
- Good command of English (spoken and written).

Contexte de travail

This position is funded by the ANR project Observables (ANR-24-CE31-7996). The project involves four permanent researchers — Dmitrii Chicherin (LAPTh), Gregory Korchemsky, Didina Serban, and Pierre Vanhove (IPhT, CEA-Saclay) — as well as one postdoctoral researcher (Alessandro Testa). The project aims to develop new theoretical tools for computing scattering amplitudes with many external particles in perturbative quantum field theory, encompassing both gauge and gravitational interactions. It focuses on three main classes of observables: Multi-loop, large-multiplicity scattering amplitudes, Energy correlations in QCD and jet physics, Gravitational-wave emission from binary systems. The overall objective is to obtain new analytical results for these observables and to uncover the hidden mathematical structures underlying gauge and gravitational theories, drawing on advances in amplitudes, integrability, and algebraic–geometric methods.

The postdoctoral researcher will be based at the CNRS laboratory LAPTh (Laboratoire d'Annecy-le-Vieux de Physique Théorique, Annecy-le-Vieux, France), and will join the Mathematical Physics team (Fields, Strings, Symmetries), which includes seven permanent researchers.

The CNRS offers a range of services in the areas of human resources and social support, including in particular:
- partial reimbursement of public transportation subscriptions,
- access to cultural and leisure activities through the Comité d'Actions et d'Entraide Sociale (CAES),
- a full-time weekly workload of 38.5 hours,
- the possibility of teleworking up to two days per week (subject to conditions),
- 45 days of annual leave, including RTT.

Contraintes et risques

The position is based at the CNRS laboratory LAPTh, Annecy-le-Vieux (74000), France. The work may involve short-term travel within Europe and internationally for collaboration meetings, workshops, and conferences. The research is theoretical in nature and does not involve any particular physical or environmental risks.