An experimental tour-de-force: Entanglement between glass bead and light

What happened

Two photons can be, in a sense, joined together, meaning that they have correlations, too. Getting a glass bead to act like a quantum object by entangling it with light.

Writing about quantum entanglement is always a challenge. There are so many clichés to avoid: It’s mysterious, ghostly, spooky, and weird.

Entanglement is none of those things, and yet it is also all of those things—a superposition of clichés, you might say. Cliché-free entanglement Quantum entanglement is nothing more or less than the idea that if two objects are linked, then their behavior will, in some ways, be correlated.