On the supersymmetrization of inflation in f(R) gravity

Understand

An N=1 Poincare supergravity action, suitable for describing the Starobinsky inflation, is proposed.

• It extends f(R) gravity to supergravity in its old-minimal version.
• The action is parametrized by a single holomorphic potential and a single non-holomorphic potential, and can be dualized into the standard matter-coupled supergravity action, with the "matter" given by two chiral superfields.
• The action extends the earlier proposals for embedding the Starobinsky inflation into supergravity, and can be further generalized to include quantum corrections to the inflation.