Tiny LEDs Pump out Quantum-Entangled Photons

The strange quantum state of entanglement isn't just challenging to think about, it's hard to create. This "spooky" phenomenon—in which two particles are linked, even if they're separated by distance—can be created by scientists in the lab using bulky lasers. But scientists published a study in Nature today in which they created a light-emitting diode (LED) that produces entangled photons. One reason entanglement is exciting is the potential to drive quantum computers that make today's best look pokey by comparison, like so: