The concept of quantum entanglement is emblematic of the gap between classical and quantum physics. Referring to a situation in which it is impossible to describe the physics of each photon separately ...

“In a GHZ state, if you measure one qubit, the whole superposition collapses. But in a W state, even if you measure one ...

The decades-old question of whether humans can see individual photons is on the brink of being answered thanks to advances in quantum optics. A positive result would let us use human observers as ...

Using a "spooky" phenomenon of quantum physics, researchers have discovered a way to double the resolution of light microscopes. Using a "spooky" phenomenon of quantum physics, Caltech researchers ...