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Results tagged with quantum-field-theory
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user 139338
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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Definition of the conserved charge in 2d Euclidean CFT
In the usual QFT context, the conserved charge is defined to be $$Q=\int \mathrm{d}x^3j^0.$$
Under the radial quantization of the 2d Euclidean CFT, the conserved charge associated with $z\rightarrow …
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3
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Is renormalizability only a problem in perturbation theory?
As far as I know, renormalization is needed when a scattering amplitude is divergent at some order of the coupling constant in a perturbation theory. So my question is whether the divergence (and thus …
- 401