A research group led by Professor Akira Furusawa at the Universicy of Tokyo, in collaboration with research groups from NTT（President：Akira Shimada）, RIKEN（President：Makoto Gonokami）,　and OptQC（CEO：Kan Takase）, has successfully generated the world’s highest-quality squeezed light, achieving quantum noise compression of 10.1 dB in a waveguide-type optical device. Squeezed light forms the foundation of various photonic quantum techonologies. High-quality light with quantum noise compressed over a broad bandwidth and at a high level is the most critical resource for realizing photonic quantum computers. Among the intensifying global competition to realize quantum computers, photonic quantum computers excel in scalability and speed. They also garner significant expectations due to their high affinity with optical communication technologies. This achievement paves the way for the future realizaion of high-speed photonic quantum computers integrating IOWN technology, significantly advancing applications in neural networks and the development of fault-tolerant quantum computers. The paper detailing this collaborative research was published online in the US scientific journal “Optics Express” on Febrary 25.