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'''Renormalization''' is a set of techniques used in [[quantum field theory]] to deal with infinities that arise in calculations of physical quantities.
'''Renormalization''' is a set of techniques used in [[quantum field theory]] to deal with infinities that arise in calculations of physical quantities.


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<div style="font-size:90%;">Renormalization adjusts parameters so predictions remain finite and measurable.</div>
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[[File:Quantum_field_theory_basics_light_fixed.jpg|thumb|280px|Quantum methods/renormalization.]]
[[File:Quantum_field_theory_basics_light_fixed.jpg|thumb|280px|Renormalization adjusts parameters so predictions remain finite and measurable.]]
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Revision as of 22:49, 17 May 2026

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Renormalization is a set of techniques used in quantum field theory to deal with infinities that arise in calculations of physical quantities.

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Renormalization adjusts parameters so predictions remain finite and measurable.

Overview

Perturbative calculations often produce divergent integrals. Renormalization absorbs these divergences into redefined physical parameters such as mass and charge.

Key ideas

  • Bare vs. physical quantities
  • Running coupling constants
  • Scale dependence

Renormalization group

The renormalization group describes how physical systems change with scale and plays a central role in modern theoretical physics.

See also

Table of contents (217 articles)

Index

Full contents

References


Author: Harold Foppele


Source attribution: Physics:Quantum Renormalization

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