General information
Organisation
The French Alternative Energies and Atomic Energy Commission (CEA) is a key player in research, development and innovation in four main areas :
• defence and security,
• nuclear energy (fission and fusion),
• technological research for industry,
• fundamental research in the physical sciences and life sciences.
Drawing on its widely acknowledged expertise, and thanks to its 16000 technicians, engineers, researchers and staff, the CEA actively participates in collaborative projects with a large number of academic and industrial partners.
The CEA is established in ten centers spread throughout France
Reference
SL-DRF-25-0351
Direction
DRF
Thesis topic details
Category
Corpuscular physics and outer space
Thesis topics
Bayesian Inference with Differentiable Simulators for the Joint Analysis of Galaxy Clustering and CMB Lensing
Contract
Thèse
Job description
The goal of this PhD project is to develop a novel joint analysis for the DESI galaxy clustering
and Planck PR4/ACT CMB lensing data, based on numerical simulations of the surveys and
state-of-the-art machine learning and statistical inference techniques. The aim is to overcome
many of the limitations of the traditional approaches and improve the recovery of cosmological
parameters. The joint galaxy clustering - CMB lensing inference will significantly improve
constraints on the growth of structure upon DESI-only analyses and refine even more the test of general relativity.
University / doctoral school
PHENIICS (PHENIICS)
Paris-Saclay
Thesis topic location
Site
Saclay
Requester
Person to be contacted by the applicant
de Mattia Arnaud 
arnaud.de-mattia@cea.fr
CEA
DRF/IRFU/DPHP/GCOSMO
DRF/Irfu/DPhP
CEA/Saclay
91191 Gif-sur-Yvette Cedex
01 69 08 62 34
Tutor / Responsible thesis director
Burtin Etienne etienne.burtin@cea.fr
CEA
DRF/IRFU/DPHP
IRFU / Université Paris Saclay
Centre de Saclay
F91191 Gif sur Yvette Cedex
01 69 08 53 58
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