advanced_tools:feynman_diagrams
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advanced_tools:feynman_diagrams [2018/04/14 09:30] aresmarrero [Intuitive] |
advanced_tools:feynman_diagrams [2018/04/14 09:31] aresmarrero [Intuitive] |
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| The thing is that we can't calculate things in quantum field theory exactly, but only using a perturbation approach (Taylor series). The first term in this approximation to the correct result yields the biggest contribution and thus is the most important part. | The thing is that we can't calculate things in quantum field theory exactly, but only using a perturbation approach (Taylor series). The first term in this approximation to the correct result yields the biggest contribution and thus is the most important part. | ||
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| + | {{ :advanced_notions:quantum_field_theory:virtualparticles.png?nolink&250|}} | ||
| An example can be seen on the right-hand side. In this example two electrons scatter. They do this by exchanging a photon $\gamma$, which is denoted by a wiggly line. After the exchange of the photon the two electrons move away from each other with different momenta. | An example can be seen on the right-hand side. In this example two electrons scatter. They do this by exchanging a photon $\gamma$, which is denoted by a wiggly line. After the exchange of the photon the two electrons move away from each other with different momenta. | ||
advanced_tools/feynman_diagrams.txt · Last modified: 2018/07/07 10:22 by jakobadmin
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