Quantum mechanics explains the basic mathematical framework that supports it all.

Quantum particles can act as particles located in a single place, or they can act as waves that are distributed all over space or in several places at once.

Three different quantum field theories deal with three of the four fundamental forces by which matter interacts:

Quantum physics is the field of physics that explains how everything works.

Understanding how electrons move or not through a solid material and so make a material a metal, an insulator or a semiconductor, for example, requires the development of "effective field theories" that don't go into all the details.