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Institut de Recherche en Mathématique et Physique

Centre de Cosmologie, Physique des Particules et Phénoménologie

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Institut de Recherche en Mathématique et Physique

Centre de Cosmologie, Physique des Particules et Phénoménologie

Cosmologie (en)

cp3 |

CP3 - Research directions and experiments
Our research comprises four connected directions:
- The theoretical description and numerical modelling of non-equilibrium quantum processes in the primordial plasma that filled the universe in the first moments after the "big bang". The aim is to gain insight into both the fundamental laws of nature and how they shaped the evolution of the cosmos.
- Exploring experimental avenues towards testing theories that address open questions in cosmology and particle physics in the laboratory. Specific topics that we work on include neutrino dynamics in dense plasmas, collider-testable baryogenesis scenarios, dark matter production and cosmic reheating after inflation.
- Data-analysis with cosmological probes of the early universe (LISA, Euclid, CMB-S4, LiteBird).
- Theories of the early universe: Cosmic and stochastic inflation, primordial black holes, topological defects.

Members

Academic staff
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PhD students
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Projects

Click the title to show project description.
  • Theory 

    We study the production and interactions of neutrinos in the primordial plasma from first principles of quantum field theory. This includes Standard Model computations such as QED corrections to Neff as well as constraints on new neutrinos species from cosmology and astrophysics.

  • We study the production of Dark Matter from non-thermal initial states in the early universe, e.g., in freeze-in scenarios. A focus of the project lies in the computation of thermal corrections.

  • We study the nonequilibrium dynamics of scalar fields in the early universe in the framework of the Schwinger-Keldysh formalism. We are interested in several applications, including inflation, reheating, Dark Matter production and the fate of the Higgs field in the early universe.

  • We study the perspectives to probe the origin of baryonic matter in the observable universe with laboratory experiments. Currently the focus lies on low scale leptogenesis scenarios. A key element of our approach lies in the description of CP violating nonequilibrium processes in the early universe from first principles of nonequilibrium quantum field theory.