Roberto Osellame

Researchers from Ephos and the Polytechnic University of Milan inscribed a 24-mode universal photonic processor into glass, using femtosecond lasers like a sewing machine needle. Operating at 925 nm—ideal for quantum-dot single-photon sources—the device is controlled by microheaters and uses less po

A compact glass chip with a maze of 128 waveguides makes photons bounce and mix like in quantum pinball. Heating controls their routes. The device solves the boson sampling puzzle—beyond ordinary computers—and outputs truly random numbers, the key to perfect encryption.