Multiphoton Generator on a Chip
Producing entangled photons whose properties are interdependent is key to several quantum communication technologies. Most techniques for generating these photons make them exclusively in pairs, and those that can produce more than two photons are difficult to implement. But researchers have now made a chip-sized device that can generate bunches of up to six microwave photons at once [1]. The device may be useful for quantum technologies such as extremely secure quantum communication.