Background

Dr Guillaume Hupin is a French nuclear theorist and researcher at the CNRS, currently based at IJCLab within the Université Paris-Saclay.

His research is dedicated to advancing the understanding of nuclear reactions through ab initio methods that describe nuclear phenomena from first principles. He holds a dual background in physics and engineering, with formative training at the École Nationale Supérieure de Physique de Grenoble (INPG-Phelma) and a PhD in theoretical nuclear physics from the University of Caen Basse-Normandie and GANIL, awarded with the highest honors.

Following his doctoral studies, he held postdoctoral positions at several leading international institutions, including Lawrence Livermore National Laboratory (USA), IPN Orsay (France), and CEA Bruyères-le-Châtel, contributing to the development of state-of-the-art methods for describing nuclear structure and reactions.

Since 2017, he has been a permanent researcher at CNRS.

Full CV 

Research Interests

Dr Hupin’s research interests center on the development of novel computational methods that describe both nuclear structure and reactions from the same theoretical framework. His team has created a unique approach capable of treating binary and ternary reaction channels for nuclei beyond four nucleons, using chiral effective field theory (EFT) interactions among protons and neutrons. This method provides an unprecedented link between low-energy nuclear observables and the strong force, promising to reshape the field of nuclear reaction theory.

Beyond nuclear theory, his current interests include:

• Deriving modern mean-field methods from first principles

• Investigating universality in open quantum systems through nuclear reactions

• Improving configuration interaction (CI) methods for ab initio calculations

• Advancing EFT applications in few-body systems

• Integrating quantum computing and machine learning into nuclear theory

He is currently the Principal Investigator of several projects, including:

• MSCA R2D2 – Focused on approximation strategies to open the mid-mass region to ab initio treatments of both bound states and reactions, supporting experimental work in nuclear astrophysics.

• ANR JCJC Nectar – Investigating the annihilation properties of antiprotonic atoms using ab initio methods.

• Fellowship des 2 infinis – Combining No-Core Shell Model, SRG, and Complex Scaling to compute nuclear properties in the continuum.

Research Networks

Dr Hupin is part of a long-standing, internationally recognised collaboration focused on modelling nuclear reactions from the most fundamental interactions between neutrons and protons. Over the past decade, he has been at the forefront of efforts to apply the ab initio paradigm to nuclear reaction theory, contributing uniquely to the field.

He plays an active role in experimental-theory collaborations at major facilities such as CERN, PSI, and GANIL. These collaborations are crucial in interpreting and predicting nuclear observables, especially in the context of nuclear astrophysics—where the influx of data from space telescopes is reshaping our understanding of cosmic phenomena.

Dr Hupin is also engaged with interdisciplinary communities at the interface of nuclear theory, ultracold atomic systems, machine learning, and quantum computing. He is currently exploring the application of generative neural networks to revolutionize how we approach nuclear many-body problems.