Noun
(physics) a theory that explains a physical phenomenon in terms of a field and the manner in which it interacts with matter or with other fields
Source: WordNetThe problem is that replacement of Quantum Mechanics by Quantum Field Theory is still very demanding. Martin Fleischmann
It appears dubious whether a field theory can account for the atomistic structure of matter and radiation as well as of quantum phenomena. Albert Einstein
What we live in, unfortunately, is a time when we are infected by what I call quantum field theory idolatry. Robert B. Laughlin
When I was at Berkeley, the framework of quantum field theory could calculate the dynamics of electromagnetism. It could roughly describe the motion of the weak nuclear force, radiation. But it hit a brick wall with the strong interaction, the binding force. David Gross
Ultimately, my Ph.D. is in mathematical physics, focusing on quantum field theory and curved space-time, and I worked with Stephen Hawking. Nathan Myhrvold
According to our present understanding, the electromagnetic field itself is produced by photons, which in turn result from a local gauge symmetry and the laws of quantum field theory (see the Second quantization and Gauge boson sections below). Source: Internet