Feynman Diagrams - 4.2 скачать в хорошем качестве

Feynman Diagrams - 4.2

Support me on: https://www.buymeacoffee.com/mattiast... Official Facebook group:   / the-online-blackboard-100785195003173   Music by Bensound: https://www.bensound.com #Feynmandiagrams #QFT In this video we will get acquainted with a very clever way of illustrating fundamental processes. Quantum field theory is very complicated as shown the introduction video. Therefore many people might feel uncomfortable with quantum field theory since the math is really complicated and requires many years of study to fully tackle. While you really do need to learn this complicated math to work with quantum field theory professionally, you can actually understand the most essential physics without any of this math. This is possible due to the famous Feynman diagrams which where introduced by American scientist Richard Feynman in 1948. Using these diagrams we can discuss and understand fundamental processes in a much simplified way using diagrams instead of math. In this video we will go into details how to use and understand such diagrams. Quantum field theory is used to describe the world at the most fundamental level. This means the level at which particles like quarks and leptons interact via different forces. This could for example be how two electrons repel each other via the electromagnetic force. Such processes are rather complicated mathematically, but Feynman diagrams let us consider such processes in a pictorial representation. This makes it much easier to understand whatever process we are interested in. The probability amplitude of a process like the repulsion of two electrons contains several variables and integrals, but using a handful of Feynman diagrams we can understand these processes intuitively. If we then want to calculate the result of a given process we then have to actually calculate all the ugly math, and this takes practice and sometimes computer tools are used. But in this video we will just learn to draw the diagrams correctly using a simple toy model and show how the math works in this simple model. The concept is the same for real physical theories, but in such theories the math is much worse. Thus considering a toy model we can understand the essential steps and concepts without needing advanced mathematics!