Tag Archive for: renormalization

spacetime5

Struggles with the Continuum: Quantum Electrodynamics

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10 Comments
  Quantum field theory is the best method we have for describing particles and forces in a way that takes both quantum mechanics…
qftintegrals

Some Useful Integrals In Quantum Field Theory

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2 Comments
In my paper on renormalisation I mentioned what most who have studied calculations in Quantum Field Theory find, it's rather complicated and mind-numbing.…
perbation theory

Introduction to Causal Perturbation Theory

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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…
renormalization2

Why Renormalisation in Quantum Theory Needs a Cutoff

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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…
renormalization

Quantum Renormalisation Made Easy

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24 Comments
What Is The Issue With Renormalisation If you have an interest in physics you have likely come across renormalisation before, although what it really…