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 ...

For decades, entanglement has been the hallmark of quantum weirdness, a ghostly connection between particles that Einstein famously called “spooky action at a distance.” It is at the heart of quantum ...

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 ...