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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.’
‘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.’
‘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.’