Deciphering Coupled Scalar Dark Sectors

Understand

Coupled dark sector models have gained significant attention, motivated by recent advances in cosmology and the pressing need to address unresolved puzzles.

• In this work, we study coupled scalar dark sector models inspired by ultraviolet-complete frameworks such as supergravity and string theory.
• These models involve scalar couplings arising either from their kinetic terms, through a non-trivial field space metric, or from their scalar potential.
• We demonstrate how these couplings can be elegantly formulated in terms of an interacting vector, a standard tool in coupled dark sector studies, and analyse their distinct cosmological effects using a dynamical systems approach.