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What good is Haag's no-go theorem? What axiomatic methods can teach us about particle physics

Koberinski, Adam (2022) What good is Haag's no-go theorem? What axiomatic methods can teach us about particle physics. In: UNSPECIFIED.

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Abstract

Haag's theorem is a no-go theorem for the interaction picture in relativistic quantum field theory. However, the interaction picture is still widely used in conventional perturbative calculations. But how exactly is the no-go theorem thereby avoided, and what do these formal results tell us about the physical systems we study, if anything? I argue that the value of axiomatic quantum field theory for modelling particle physics systems lies in understanding the structural relationships between certain features of a quantum field description. For Haag's theorem, we learn that unitary inequivalence is an infrared effect that may be resolved by more realistic idealizations, or even a revision to the vacuum concept in quantum field theory.


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Item Type: Conference or Workshop Item (UNSPECIFIED)
Creators:
CreatorsEmailORCID
Koberinski, Adamadam.koberinski@pitt.edu0000-0001-7605-4214
Keywords: Haag's theorem Philosophy of quantum field theory Modelling frameworks
Subjects: Specific Sciences > Physics > Quantum Field Theory
Depositing User: Dr. Adam Koberinski
Date Deposited: 30 Dec 2022 08:20
Last Modified: 30 Dec 2022 08:20
Item ID: 21599
Subjects: Specific Sciences > Physics > Quantum Field Theory
Date: 2022
URI: https://philsci-archive.pitt.edu/id/eprint/21599

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