The past decade have seen cosmology entering into a precision science: complementary probes from the CMB, supernovae, galaxy clustering and weak lensing have established Lambda-CDM as the standard paradigm. Yet we are now entering a decisive phase: DESI has recently challenged the Lambda-CDM paradigm through the possible detection of an evolving Dark Energy component. And other wide spectroscopic surveys have started (Euclid, SDSS-V, PFS) or will soon start (4MOST, Weave) and will likely challenge our understanding of cosmology. Furthermore, cosmological tensions (such as the H0, S8 and dipole tensions) do persist however across datasets, indicative of unsolved systematics or new physics. Novel measurement approaches including the high-density region (clusters of galaxies), the low densities regions (voids) and the properties of the cosmic web (filaments) may provide further constraint on the cosmological world model. Interpreting the measurements to derive cosmological constraints is today in part limited by our (imperfect) simulations of the universe aiming to reproduce or challenge our observables. Potentially Artificial Intelligence may help us to build more comprehensive simulation and modeling to derive quantitative cosmological results. Finally, new generation large scale structure experiments are in the planning, with the goal to map the universe with spectroscopic redshift over the full extragalactic sky and out to redshift z~7. These experiments together with other probes (weak lensing, hydrogen maps, fast radio bursts and gravitational wave events) are about to transform our observational understanding of cosmology.

Programme

• Ground based mapping results (DESI, 4MOST, PFS, Weave ?)
• Space based challenges and results (Euclid, ...)
• Cosmology from BAO and RSD, model constraints and tensions
• High-density (cluster) and Low density (voids) measurements and their impact on cosmology
• The challenge of simulations and the impact of AI
• Future surveys: MUST, Spec-S5, WST, and others

Invited speakers

Coming Soon !!!

Scientific organisers

Sofia Contarini (co-chair, MPE), Jean-Paul Kneib (co-chair, EPFL), Michele Moresco (co-chair, Univ. of Bologna), Camille Bonvin (University Of Geneva), Carmelita Carbone (IASF Milan), Song Huang (Tsinghua university), Alexie Leauthaud (University of California), Johan Richard (Univ. of Lyon), David Schlegel (LBNL), Marcele Soares-Santos (University of Zurich), Masahiro Takada (IPMU), Gongbo Zhao (NAOC)

Contact

jean-paul.kneib @ epfl.ch