Speaker
Description
This project aims to study the possibility of some interactions among three types of particles, i.e., electrons, positrons, and photons, from quantum perspective. The transition amplitudes of which the squares are occurring probability for some interactions are investigated. Despite having a simple method of Feynman diagram and Feynman rule, in this work, the transition amplitudes are calculated from foundational assumptions of quantum field theory (QFT) by mean of the quantum electrodynamics interaction operator, S operator, expansion. It is found that the second order S operator predicts the existence of interactions with non-vanishing transition amplitude, for example, electron-position scattering, electron-position annihilation and pair-production, electron-photon scattering, and positron-photon scattering.
