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Results tagged with quantum-field-theory
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user 31844
Quantum Field Theory (QFT) is the theoretical framework describing the quantisation of classical fields which allows a Lorentz-invariant formulation of quantum mechanics. QFT is used both in high energy physics as well as condensed matter physics and closely related to statistical field theory. Use this tag for many-body quantum-mechanical problems and the theory of particle physics. Don’t combine with the [quantum-mechanics] tag.
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Quantum field theory
No. A field theory has little to do with the wave behaviour of elementary particles. It is in fact the quantum mechanics that postulates elementary particles as entities with wave-like properties. A f …
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Particle annihilation - mathematical description, equations governing it? [duplicate]
I was wondering about this and I would like to know an explanation why do particles and antiparticles annihilate? I would be interested in phenomenological, but most importantly mathematic explanation …
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Distributive properties of quantum field theory
In the Quantum Field Theory(QFT), we work in the distributional sense, that the normalization of vacuum is
\begin{equation}\langle0|0\rangle=2E(\vec{0})(2\pi)^3\delta(\vec{0})\end{equation}
This fact …
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Quantum mechanical/QFT approach to Bremsstrahlung
The problems of damping force or Abraham-Lorentz force should, according to wikipedia, be solved in quantum mechanics or its relativistic counterpart, the quantum field theory. My question is, since w …
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