Quantum corrections during inflation and conservation of adiabatic perturbations

Understand

The possibility that quantum corrections break the conservation of superhorizon adiabatic perturbations in single field inflation is examined.

• I consider the lowest order corrections from massless matter fields in the Hamiltonian formalism.
• Particular emphasis is therefore laid on the renormalization.
• The counterterms are the same as in the Lagrangian formalism.