Entangled Photons Can Come Out in Webs Now

The equipment that generates quantum entanglement is often bulky and produces entangled photons only one pair at a time. Now scientists have created a device roughly one-third as thick as a penny that can yield complex webs of entangled photons—not just in pairs but several pairs all linked together. The invention may not only greatly simplify the setup needed for quantum technology but also help support more complex quantum applications.