3rd School: 2025 (Daejeon)

The 3rd \(\mathcal{C}\mathtt{osmo}\mathcal{L}\mathtt{attice}\) school was held at the Institute for Basic Science (IBS) in Daejeon, South Korea, during Sept. 22-26 2025. The school offered a pedagogical introduction to lattice field theory techniques and their application to simulations of interacting fields in an expanding Universe. Participants were also introduced to \(\mathcal{C}\mathtt{osmo}\mathcal{L}\mathtt{attice}\), an open-access code designed for such simulations. The school provided a comprehensive guide to using \(\mathcal{C}\mathtt{osmo}\mathcal{L}\mathtt{attice}\) to model the non-linear dynamics of scalar and gauge fields in cosmological contexts.

The Indico page of the event was:

https://indico.ific.uv.es/event/8110/

Lectures were given by:

  1. J. Baeza-Ballesteros ........... DESY, Zeuthen, Germany
  2. D. G. Figueroa ........... IFIC, Valencia, Spain
  3. N. Loayza ........... IFIC, Valencia, Spain
  4. K. Marschall ........... IFIC, Valencia, Spain
  5. A. S. Midiri ........... University of Geneva, Switzerland
  6. A. Roper Pol ........... University of Geneva, Switzerland
  7. F. R. Sattler ........... Bielefeld University, Germany
  8. F. Torrenti ........... University of Barcelona, Barcelona, Spain
  9. A. Urio ........... UPV/EHU, Bilbao, Spain

Topics

  • Lattice field theory techniques: discretization schemes, lattice gauge techniques, and more.
  • Numerical algorithms for differential equations: Leapfrog, Verlet, Runge-Kutta, etc.
  • Overview of CosmoLattice: libraries, modularity, parallelization, etc.
  • Lattice simulations of interacting fields in an expanding background:
    • Scalar field dynamics with arbitrary potentials.
    • U(1) gauge theories coupled to complex charged scalars.
    • SU(2) gauge theories coupled to doublet charged scalars.
  • Modern applications to early Universe scenarios:
    • Preheating scenarios and onset of radiation domination.
    • Production and evolution of gravitational waves.
    • Dynamics of derivatively coupled axion-like fields.
    • Dynamics of non-minimally coupled scalar fields.
    • Fluid dynamics and gravitational waves from turbulence.
    • Evolution and experimental signatures of topological defects.

Organization

  • Organizers: Mohammad Ali Gorji, Daniel G. Figueroa, Dong-Won Jung, Masahide Yamaguchi.
  • Scientific secretaries: Jorge Baeza-Ballesteros, Antonino S. Midiri.