Questions tagged [quantum-field-theory]

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Quantum chromodynamics - an origin of the name

A theory of strong interaction is called quantum chromodynamics (QCD). Particles interacting strongly are supposed to have color charge, for example quarks appear in three "mutations" - red, green and ...
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Historically how it was discovered that we need fields to describe matter?

This question is from one historical perspective. The question is: how physicists historically found out that one needs quantum fields to describe matter? Being more detailed. Let us consider the ...
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0answers
50 views

What is the history and motivation for the (d-1,1) notation used to describe a field theory?

Very often in the literature of research papers and other articles, and maybe text books, on topics of quantum field theory, a theory may be described as a 3+1 or 0+1, or maybe even 1+1 theory. I ...
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Origin of heat kernel regularization

One of the ones the make the infinite vacuum zero point energy finite is to use the heat kernel regularization. Does anyone know the origin of this method? Or the first paper published discussing such ...
4
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1answer
310 views

Who first proposed the “colour” charge?

Does anybody know a paper or sorts in which the term "colour" charge in QCD was introduced first? Or any other source in which this label was proposed?
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178 views

How did Lie groups work their way into the Standard Model of Particle Physics [duplicate]

In a question answered on this site concerning how group theory worked its way into quantum mechanics it was proposed that this was done by Weyl while investigating the many electron problem. Yes, but ...
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1answer
159 views

History of the fock space based quantization of fields

In almost all Quantum Field Theories textbooks the same approach to quantization is presented as the first example: one considers the scalar real Klein-Gordon field $\phi$ and just write it as $$\phi(...
5
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1answer
290 views

The origin of Renormalization Group

Polyakov remembers the development of Renormalization Group and Conformal Bootstrap as "With the use of the ingenious technique, developed by Gribov and Migdal [1] in the problem of reggeons, I found ...
9
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1answer
398 views

Does anyone know the physics student who passed a quantum mechanics oral exam without taking quantum mechanics?

Many years ago I read an interview with a physics professor, where he recounted a funny situation when he was a graduate student at Harvard. When a first year, he was supposed to take the quantum ...
11
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1answer
377 views

What is the origin of the “virtual particle pair” metaphor for vacuum fluctuations?

In any layman level description of vacuum fluctuations in quantum field theory the fluctuations are described as a pair of virtual particles spontaneously appearing then disappearing within some short ...
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1answer
155 views

How were particle physics calculations done before Feynman diagrams?

I've seen and read that calculations before Feynman diagrams involved solving differential equations, but I can't find sample calculations like these. I've read that they would take months and pages ...
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2answers
687 views

What was the first journal to have Feynman Diagrams?

I'm writing a paper on the history of Feynman diagrams and am having trouble finding the first paper published by Feynman which features a calculation done with Feynman Diagrams.