Louis Legrand

Louis Legrand is a postdoctoral researcher in cosmology at the Department of Applied Mathematics and Theoretical Physics (DAMTP) at the University of Cambridge, supported by the Swiss Postdoc Mobility Fellowship. He is affiliated with the Kavli Institute for Cosmology and focuses on understanding the Universe's structure, neutrino mass, and the nature of cosmic acceleration through gravitational lensing of the Cosmic Microwave Background (CMB) and large-scale structure analyses. His research includes developing optimal estimators for CMB lensing reconstruction and combining CMB data with Euclid mission datasets.

He previously conducted research at the ICTP South American Institute for Fundamental Research (São Paulo) and the University of Geneva's cosmology group. His work bridges CMB lensing with galaxy clustering and weak lensing, aiming to enhance cosmological parameter precision and break degeneracies in models.

Key scientific contributions include advancing CMB lensing methodologies, forecasting Euclid-CMB joint constraints, and analyzing galaxy formation efficiency using high-redshift data. He actively collaborates on software tools like delensalot and plancklens for iterative lensing analysis.

• Awards: Swiss Postdoc Mobility Fellowship
• Research Groups: Relativity and Gravitation Group at DAMTP