# equation of state

10 Jan 2024Why can one reach only equations of state parameters of \(w=+1/3\) with electrodynamics but \(w=+1\) with a scalar field, aka quintessence?

bonus question: What does this imply for the Ricci-curvature?

Why can one reach only equations of state parameters of \(w=+1/3\) with electrodynamics but \(w=+1\) with a scalar field, aka quintessence?

bonus question: What does this imply for the Ricci-curvature?