Quantum field theory and Quantum physics

Quantum field theory noun - The branch of quantum physics that is concerned with the theory of fields; it was motivated by the question of how an atom radiates light as its electrons jump from excited states.

Quantum physics and quantum field theory are semantically related. In some cases you can use "Quantum physics" instead a noun phrase "Quantum field theory".

Quantum physics noun - The branch of physics based on quantum theory.

Quantum field theory and quantum physics are semantically related. Sometimes you can replace phrase "Quantum field theory" with "Quantum physics", this phrases are similar.