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Perturbation Theory Articles

Tag Archive for: perturbation theory

perbation theory

Introduction to Causal Perturbation Theory

June 7, 2015
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30 Comments
Relativistic quantum field theory is notorious for the occurrence of divergent expressions that must be renormalized by recipes that on first sight sound…
https://www.physicsforums.com/insights/wp-content/uploads/2015/06/perbationt.png 135 240 Arnold Neumaier https://www.physicsforums.com/insights/wp-content/uploads/2019/02/Physics_Forums_Insights_logo.png Arnold Neumaier2015-06-07 19:40:532023-10-03 04:14:19Introduction to Causal Perturbation Theory
renormalization2

Why Renormalisation in Quantum Theory Needs a Cutoff

May 24, 2015
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31 Comments
Introduction This is a follow on from my paper explaining renormalization. A question was raised - why exactly do we need a cut-off. There is a deep reason…
https://www.physicsforums.com/insights/wp-content/uploads/2015/05/renormalization2.png 135 240 Bill Hobba https://www.physicsforums.com/insights/wp-content/uploads/2019/02/Physics_Forums_Insights_logo.png Bill Hobba2015-05-24 11:59:412021-04-17 09:03:14Why Renormalisation in Quantum Theory Needs a Cutoff

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