Definition of gauge theory in US English:

gauge theory


  • A quantum theory using mathematical functions to describe subatomic interactions in terms of particles that are not directly detectable.

    • ‘In the perturbative expansion of a gauge theory, large numbers of Feynman amplitudes combine to produce mathematically simple expressions.’
    • ‘The obvious thing to do was to try it out on the simplest gauge theory of all, electrodynamics - to break its symmetry to see what really happens.’
    • ‘He produced the first gauge theory in which the Maxwell electromagnetic field and the gravitational field appear as geometrical properties of space-time.’
    • ‘A gauge theory would therefore also be a description of quantum gravity in a particular background space-time.’
    • ‘This picture was improved upon by using a non-abelian gauge theory, Quantum Chromodynamics.’