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

It is the best description of the nature of the particles that make up matter and the forces with which they interact. If you want to explain how photons on light ...

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

To understand how things work in reality, quantum mechanics must be combined with other elements of physics, such as Einstein's special theory of relativity, to creat...

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

• Electromagnetism: It explains how atoms hold together.
• The strong nuclear force: It describes the stability of the nucleus at th...

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.

But it is difficult to constru...

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.

How they appear seems to depend on how we choose to measure them. Before we measure, they seem to have no apparent p...

• A fourth fundamental force of nature that quantum theory cannot explain, namely gravity, doesn't even involve particles. None of the decades of effort can bring gravity under the quantum umbrella to explain all of fundamental physics within one "theory of everything."
...