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 search for a unified theory—combining quantum mechanics and general relativity—represents the ultimate goal of theoretical physics:

• General relativity perfectly describes gravity and large-scale structures
• Quantum mechanics perfectly describes subatomic par...

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...