Light particles can link distant quantum computers into one

Traditional computers talk to each other by sending copies of data, but a new breakthrough by the company IonQ uses light particles to physically link the internal logic of two separate processors. Using photonic interconnects—specialized bridges made of light—researchers successfully entangled the qubits of one machine with those of another. This means that changing a particle in the first computer instantly dictates the state of a particle in the second, regardless of the physical gap between them.