Lethargic
发表于 2025-3-23 10:31:24
Propagators and Scattering Theory,s the quantum field theory of electrons and positrons (the electron–positron field) and photons (the electromagnetic or radiation field). The theory also applies to the known heavy leptons (. and .) and, in general, can be used to describe the electromagnetic interaction of other charged elementary
Osteons
发表于 2025-3-23 16:36:52
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TEM
发表于 2025-3-23 20:20:19
The Scattering Matrix in Higher Orders,ng constant .≈1/137 the first term alone frequently gives reliable results. Within a satisfactory theory, however, one should be able to calculate the contributions of higher orders too. As we shall see in QED – and the same is true in all quantum field theories – this leads to characteristic diffic
不在灌木丛中
发表于 2025-3-24 00:03:36
Two-Particle Systems,far. In the following we want to write down an exact equation for the two-particle system, at least in principle, even if it turns out that it is too difficult to find an exact solution for this equation. Then we shall study an approximation that again leads to a kind of Dirac equation with an inter
Canvas
发表于 2025-3-24 04:56:10
,Quantum Electrodynamics of Spinless Bosons, by the Dirac equation. The theory of quantum electrodynamics describes the interaction of these particles with each other and with the photon field in a very satisfying way. In principle, nothing prevents us from trying to construct a similar theory also for other kinds of particles. The simplest c
LAPSE
发表于 2025-3-24 08:22:00
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institute
发表于 2025-3-24 13:31:30
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下边深陷
发表于 2025-3-24 16:27:30
Two-Particle Systems,difficult to find an exact solution for this equation. Then we shall study an approximation that again leads to a kind of Dirac equation with an interaction potential (the Breit interaction, see Example 6.4).
novelty
发表于 2025-3-24 21:30:15
Quantum-Electrodynamical Processes,g electrons, positrons, and photons. These rules, although derived in a nonrigorous fashion, provide a correct and complete description of QED processes. The same set of “Feynman rules” results from a systematic treatment within the framework of quantum field theory.
obviate
发表于 2025-3-24 23:10:30
The Scattering Matrix in Higher Orders, In what follows we shall discuss “renormalization in the lowest nontrivial order of perturbation theory. The finite theory obtained in this way can then be applied to calculate measurable effects of vacuum fluctuations, i.e. the interaction with virtually created particles.