A team of South Korean researchers has achieved a major milestone by developing an integrated quantum circuit chip that uses photons, or light particles. This breakthrough is expected to boost their position in global quantum computation research. The Electronics and Telecommunications Research Institute (ETRI) announced the creation of a photonic integrated-circuit chip capable of controlling eight photons. This innovative system allows researchers to investigate complex quantum phenomena, including multipartite entanglement, which arises from interactions among the photons. Through extensive research into silicon-photonic quantum circuits, ETRI has successfully demonstrated 2-qubit and 4-qubit quantum entanglement, achieving record performance for a 4-qubit silicon photonics chip. These accomplishments were the result of collaboration with KAIST and the University of Trento in Italy, and the findings have been published in the highly regarded journals Photonics Research and APL Photonics. As a further advancement, ETRI recently demonstrated 6-qubit entanglement using a chip designed to control 8-photonic qubits. The 6-qubit entanglement represents a record-breaking achievement in quantum states based on a silicon-photonic chip.

Full report : South Korean researchers have developed a groundbreaking photonic quantum circuit chip that promises to accelerate the global race in quantum computing.