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  2. Jefimenko's equations - Wikipedia

    en.wikipedia.org/wiki/Jefimenko's_equations

    The Heaviside–Feynman formula, also known as the Jefimenko–Feynman formula, can be seen as the point-like electric charge version of Jefimenko's equations. Actually, it can be (non trivially) deduced from them using Dirac functions, or using the Liénard-Wiechert potentials. [4] It is mostly known from The Feynman Lectures on Physics, where ...

  3. File:Explanation of variables in Heaviside-Feynman formula.svg

    en.wikipedia.org/wiki/File:Explanation_of...

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  4. List of Feynman diagrams - Wikipedia

    en.wikipedia.org/wiki/List_of_Feynman_diagrams

    In the Stückelberg–Feynman interpretation, pair annihilation is the same process as pair production: Møller scattering: electron-electron scattering Bhabha scattering: electron-positron scattering Penguin diagram: a quark changes flavor via a W or Z loop Tadpole diagram: One loop diagram with one external leg Self-interaction or oyster diagram

  5. Heaviside step function - Wikipedia

    en.wikipedia.org/wiki/Heaviside_step_function

    The Heaviside step function, or the unit step function, usually denoted by H or θ (but sometimes u, 1 or 𝟙), is a step function named after Oliver Heaviside, the value of which is zero for negative arguments and one for positive arguments. Different conventions concerning the value H(0) are in use.

  6. Richard Feynman - Wikipedia

    en.wikipedia.org/wiki/Richard_Feynman

    Richard Phillips Feynman (/ ˈ f aɪ n m ə n /; May 11, 1918 – February 15, 1988) was an American theoretical physicist.He is best known for his work in the path integral formulation of quantum mechanics, the theory of quantum electrodynamics, the physics of the superfluidity of supercooled liquid helium, and in particle physics, for which he proposed the parton model.

  7. Feynman diagram - Wikipedia

    en.wikipedia.org/wiki/Feynman_diagram

    The Feynman diagrams are much easier to keep track of than "old-fashioned" terms, because the old-fashioned way treats the particle and antiparticle contributions as separate. Each Feynman diagram is the sum of exponentially many old-fashioned terms, because each internal line can separately represent either a particle or an antiparticle.

  8. Propagator - Wikipedia

    en.wikipedia.org/wiki/Propagator

    In quantum mechanics and quantum field theory, the propagator is a function that specifies the probability amplitude for a particle to travel from one place to another in a given period of time, or to travel with a certain energy and momentum.

  9. Heaviside–Lorentz units - Wikipedia

    en.wikipedia.org/wiki/Heaviside–Lorentz_units

    To convert any formula between the SI, Heaviside–Lorentz system or Gaussian system, the corresponding expressions shown in the table below can be equated and hence substituted for each other. Replace 1 / c 2 {\displaystyle 1/c^{2}} by ε 0 μ 0 {\displaystyle \varepsilon _{0}\mu _{0}} or vice versa.