So far, harnessing the power of quantum entanglement onto silicon chips has proven to be a difficult task because of the large size of the devices used to emit entangled photons; photons are essentially the particles that make up light.
The researchers of Università degli Studi di Pavia in Italy have come up with a way to solve this problem by creating a microscopic device that can supposedly fit onto a silicon chip and produce entangled photons. The researchers paired a silicon wafer with what’s known as a ring resonator — a closed loop that photons enter on one side via a laser beam. They emerge entangled on the other side,where they are captured.
According to the research paper, the team of scientists was able to “demonstrate that silicon ring resonators in a silicon-on-insulator platform are an efficient source of time-energy entangled photon pairs.”