3 papers
astro-ph.IM2026
gevolution 2.0: GPU-accelerated relativistic N-body simulations for cosmology
Julian Adamek, Øyvind Christiansen
High-performance computing is increasingly dominated by hardware acceleration using Graphics Processing Units (GPUs). To take advantage of this long-term trend, we implement a majo…
astro-ph.CO2024
Environmental cosmic acceleration from a phase transition in the dark sector
Øyvind Christiansen, Farbod Hassani, David F. Mota
A new degravitation mechanism within the framework of scalar tensor gravity is postulated and included by prescription. The mechanism eliminates all constant contributions from the…
astro-ph.CO2024
Gravitational waves from dark domain walls
Øyvind Christiansen, Julian Adamek, Farbod Hassani +1
For most of cosmic history, the evolution of our Universe has been governed by the physics of a 'dark sector', consisting of dark matter and dark energy, whose properties are only…