Ricci cosmology

Understand

We revisit spatially flat FLRW cosmology in light of recent advances in standard model relativistic fluid dynamics.

• Modern fluid dynamics requires the presence of curvature-matter terms in the energy-momentum tensor for consistency.
• These terms are linear in the Ricci scalar and tensor, such that the corresponding cosmological model is referred to as ``Ricci cosmology''.
• No cosmological constant is included, there are no inflaton fields, bulk viscosity is assumed to be zero and we only employ standard Einstein gravity.