Attempt to describe all fundamental interactions between elementary particles in terms of a single theoretical framework (a theory of everything) based on quantum field theory. So far, the weak force and the electromagnetic force have been successfully united in electroweak theory, and the strong force is described by a similar quantum field theory called quantum chromodynamics. However, attempts to unite the strong and electroweak theories in a grand unified theory have failed, as have attempts at a self-consistent quantum field theory of gravitation.
This entry comes from Encyclopædia Britannica Concise.For the full entry on unified field theory, visit Britannica.com.
What made you look up unified field theory? Please tell us what you were reading, watching or discussing that led you here.
Take Our 10-Question Quiz
The commonly misspelled words quiz
A quick quiz about stuff worth knowing
How strong is your vocabulary?
The Vocab Quiz Game for iPhone & iPad
"Incredibly fun and addictive. And informative!" User Review, iTunes