Jul 15 – 19, 2024
Perimeter Institute for Theoretical Physics
America/Toronto timezone
Reminder: Monday and Tuesday's sessions take place at Federation Hall (University of Waterloo), with the remainder of the week at Perimeter Institute.

Non-linear dark energy simulations

Jul 17, 2024, 11:00 AM
45m
PI/1-100 - Theatre (Perimeter Institute for Theoretical Physics)

PI/1-100 - Theatre

Perimeter Institute for Theoretical Physics

190

Speaker

Martin Kunz (University of Geneva)

Description

The coming years will see an amazing increase in data on the large-scale structure of the Universe, ushering in a new phase for "precision cosmology". One of the major questions in fundamental physics concerns the nature of the dark energy, and the new data may help to shed light on this issue. But in order to unlock the full power of the future data to test alternative models like Horndeski Gravity, we need theoretical predictions that are as accurate as the new observations on all scales, including non-linear scales. In my presentation I will introduce our relativistic N-body code for cosmological simulations, gevolution, and how we are using it to look at non-linear effects in the Universe. In particular I will discuss our k-essence simulations, how to use them for cosmology, and what can happen when dark energy clustering becomes non-linear in models with low speed of sound.

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External references