Modular invariant Starobinsky inflation and the Species Scale by Gonzalo F. Casas, Luis E. Ibáñez

“…This scale transforms as an automorphic form of the theory’s duality symmetries. We propose that the inflaton potential should be 1) an automorphic invariant form, non-singular over all moduli space, 2) depending only on Λ and its field derivatives, and 3) approaching constant values in the region of large moduli VEVs to ensure a long period of inflation. …”
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