Physics:Quantum methods/renormalization: Difference between revisions

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{{Short description|Method for removing infinities in quantum field theory}}
{{Short description|Method for removing infinities in quantum field theory}}
{{Quantum book backlink|Field and many-body methods}}
{{Quantum methods backlink|Field and many-body methods}}
{{Quantum methods backlink|Field and many-body methods}}


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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>
<div style="font-size:90%;">Renormalization adjusts parameters so predictions remain finite and measurable.</div>
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Revision as of 15:50, 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.

Renormalization adjusts parameters so predictions remain finite and measurable.
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Quantum methods/renormalization.

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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