Unified no-scale model of modulus fixing, inflation, supersymmetry breaking, and dark energy

We present a minimal $\mathrm{SU}(2,1)/\mathrm{SU}(2)\times \mathrm{U}(1)$ no-scale model that unifies modulus fixing, Starobinsky-like inflation, an adjustable scale for supersymmetry breaking, and the possibility of a small cosmological constant, a.k.a. dark energy.

Figure 1

Realization of the Starobinsky inflationary potential with the initial values of $x(0)=5.35$, $\rho (0)=0$. The amplitude of the oscillation and the location of the barrier is given by $⟨\rho /{\mathrm{\Lambda }}_T{⟩}_{\mathrm{Min}}\sim 0.34$.