nLab large gauge transformation

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Context

Field Theory

algebraic quantum field theory (perturbative, on curved spacetimes, homotopical)

Introduction

Concepts

field theory:

Lagrangian field theory

quantization

quantum mechanical system, quantum probability

free field quantization

gauge theories

interacting field quantization

renormalization

Theorems

States and observables

Operator algebra

Local QFT

Perturbative QFT

Differential cohomology

Contents

Idea

In gauge theory, a gauge transformation is called large if it is not connected to the identity gauge transformation by a path in the gauge group.

As opposed to other (small) gauge transformations, large gauge transformations count as global symmetries.

References

See also:

In the context of asymptotic symmetries of electromagnetism/quantum electrodynamics

Last revised on May 22, 2026 at 06:40:18. See the history of this page for a list of all contributions to it.