Quantum field theory marries the ideas of other quantum theories to depict all particles as “excitations” that arise in underlying fields. The British physicist Paul Dirac started the ball ...

Aug 11, 2021 · Quantum fields are made up of quantum oscillators, an infinity-of-infinities of them. These oscillators are little gadgets, everywhere, that spew out and consume quanta, the …

Jun 4, 2024 · When people explain Quantum Field Theory, one of the first things they'll say is that quantum fields exist everywhere. This seems like a fairly reasonable framework to base QFT …

Jun 5, 2017 · The replies which suggest that the answer to "What is a quantum field?" is unclear or even open are wrong. The impression that this could be unclear is owed to the standard …

Feb 1, 2024 · 8 Let's address first your title question "What exactly is a quantum field?" The answer is essentially given in the first five chapters of Weinberg's textbook: a quantum field is …

Apr 18, 2015 · 11 I'm just an aficionado, but my understanding is that in QFT, the photon is an excitation of the electromagnetic field, the electron is an excitation of the electron field, and so …

Jun 30, 2014 · Using the description of field theory, and it's true both in classical field theory and quantum field theory, fields interact because of specific terms in the Lagrangian or the …

Sep 30, 2022 · Quantum fields are analogous to a coordinate system on which with differential operators on the named fields ( electron, neutrino...) one can mathematically model the real …

Dec 29, 2020 · What are the fields that exist in the standard model and QFT? I know the electromagnetic field and the Higgs field, but what other fields are there? Also, how do they …

A quantum field is a ill-defined mathematical concept. It can be made rigorous, but it is not the way a physicist would like. So a rather good answer could be: a field is an operator-valued …