The Unfinished Revolution of Quantum Gravity

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...

The reason Einstein’s theory of general relativity works well in lower energy calculations and standard quantum techniques but not in higher energies and scales (like a black hole), could be because certain key features or ingredients of gravity are yet unknown to us, and are therefore missing fr...

Any proposed theory of quantum gravity would need to take care of the principles of locality, which state that any variable can change independently while measuring the properties of any point in space-time. These variables are called the degrees of freedom.

A...