Quantum mechanics and general relativity are the two pinnacles of 20th-century physics. In their respective fields, ...

I keep coming back to a strange idea: what if everything we know about quantum physics is already encoded inside a single atom? Not in a mystical sense, but in the very real way that one tiny system ...

Kellogg Stelle was a professor of physics at Imperial College London for decades until his death last month. In 1977, he developed a particle theory of gravity that’s renormalizable, but the theory’s ...

At the turn of the century, it sounded as if string theory could give us big answers about the universe. Well… has it?

Physics has a reputation for being dominated by men, especially a century ago, as quantum physics was just being invented – ...

Teleportation is a reality in 2025 — well, at least for quantum computers. In February 2025, Oxford University demonstrated the teleportation of quantum data from one independent quantum processor to ...

At the low temperatures required in quantum devices, strontium titanate crystals (purple atom and bipyramids) let electric fields sculpt light fields (blue) orders of magnitude better than any other ...

This repository aims to contain definitions and proofs of basic ideas in quantum information theory. Some major goals, in rough order of difficulty, would be ...