Chameleon Mechanism in Scalar Nonmetricity Cosmology

Understand

We investigate the dynamics and the phase-space evolution for the scalar nonmetricity cosmology with a Chameleon mechanism.

• In particular, we consider a spatially flat Friedmann--Lema\^{\i}tre--Robertson--Walker geometry and within the framework of scalar nonmetricity theory, we consider a generalization of the Brans-Dicke theory in nonmetricity gravity.
• Introducing a pressureless gas as the matter source, we also incorporate a coupling function responsible for the interaction.
• Our findings reveal that the choice of connection in nonmetricity gravity significantly impacts the interaction between the scalar field and the matter source.