Neutrino oscillations in the interaction picture: a brief introduction

We provide a brief overview of the main results of the interaction picture approach to neutrino oscillations. In this framework, mixing is treated as an interaction between different neutrino flavors. The oscillation formula is derived by calculating the survival probability of a specific flavor neutrino. Notably, this method yields the same modified oscillation formula as the flavor Fock space approach, exhibiting dependence on both the difference and the sum of neutrino frequencies.