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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.’