QED has a prescription to calculate the self-energy, and it's easiest via Feynman diagrams. "Two-loops" refers to the Feynman diagrams that describe this quantum process—two virtual photons from ...

Each gate moves the orange dot on the Argand diagram above to a different point ... He is the Richard P. Feynman Professor of Theoretical Physics at Caltec and the Director of the Institute ...

The topics covered are Feynman diagram rules, microscopic mean-field theories (Hartree-Fock and Kohn-Sham theories, natural orbitals), many-body perturbation theory, large-scale diagonalization ...

FeynmanDiagram.jl: A mini-compiler that compiles generic multi-loop Feynman diagrams to a computational graph, which then can be efficiently manipulated or evaluated. The same type of computational ...

Explore why QFT (Quantum Field Theory) is essential to understand nature at smallest scales. You’ll also learn how to use Feynman diagrams to describe physical processes using perturbation theory.

The equivalence between Richard Feynman’s and Julian Schwinger’s distinct formulations ... We can look at two images of shapes, then ask if they are the same shape (see diagram): The way most of us ...

Choose a concept, pretend you’re teaching it to someone else, and identify the gaps in your own understanding. Review ...

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