3 papers
astro-ph.CO2025
Quintessence and phantoms in light of DESI 2025
Ioannis D. Gialamas, Gert Hütsi, Martti Raidal +3
We analyse DESI BAO, CMB, and supernova data to explore the physical origin of the DESI indication for dynamical dark energy. Beyond the standard CPL parametrization, we explore tr…
hep-ph2024
Thermalization effects on the dynamics of growing vacuum bubbles
Tomasz Krajewski, Marek Lewicki, Martin Vasar +3
We study the evolution of growing vacuum bubbles. The bubble walls interact with the surrounding fluid and may, consequently, reach a terminal velocity. If the mean free path of th…
astro-ph.CO2024
Interpreting DESI 2024 BAO: late-time dynamical dark energy or a local effect?
Ioannis D. Gialamas, Gert Hütsi, Kristjan Kannike +4
We perform fits to DESI, CMB and supernova data to understand the physical origin of the DESI hint for dynamical dark energy. We find that the linear parametrization of the equatio…