Feynman diagrams are incredibly useful, but they're a perturbative (i.e., approximate) approach to calculating, and quantum field theory often yields fascinating, unique results when you take a ...

The quantum field theory framework needed some adjustment for Borinsky and Vogtmann to get the right count. For instance, in quantum field theory, two graphs that are mirror images of each other are ...

In current quantum field theory, causality is typically defined by the vanishing of field commutators for spacelike separations. Two researchers at the University of Massachusetts and Universidade ...

Quantum gravity tries to combine Einstein’s general theory of relativity with quantum mechanics. ... More Quantum corrections to classical gravity are visualized as loop diagrams, as the one ...

For centuries, researchers have attempted to describe all the fundamental forces of nature and how they interact in a single theory. This unified field theory stumped the likes of Albert Einstein ...

Dreams of a unified field theory. Einstein's aim was to explain electromagnetism as a geometric property of four-dimensional spacetime. He continued this work until his death in 1955.