Explore a 41-minute conference talk on the non-equilibrium Green's function method for energy, momentum, and angular momentum transfer mediated by photons. Delve into topics such as the Coulomb problem, Meir-Wingreen formula, heat transfer between graphene sheets and nanotubes, and system setups. Examine NEGF preliminaries, fluctuation-dissipation theorem, Dyson equations, and Keldysh equation. Investigate the Poynting theorem, momentum and angular momentum conservation, and far-field approximations. Learn about torque and force on objects, resonance effects, and emission from graphene edges. Discover the advantages of NEGF and explore angular momentum emission from a benzene molecule. Presented by Jian Sheng Wang from the National University of Singapore at the Quantum and Thermal Electrodynamic Fluctuations in the Presence of Matter conference held at the Kavli Institute for Theoretical Physics.