# University of Tokyo Achieves 1,000x Speed Boost in Quantum Entanglement Generation, Opening Door to Ultra-Fast Optical Computing **Source:** https://glitchwire.com/news/university-of-tokyo-achieves-1000x-speed-boost-in-quantum-entanglement-generatio/ **Published:** 2026-05-14T21:30:22.904Z **Author:** Tech Desk ยท Glitchwire **Categories:** Tech, Science ## Summary A joint research effort between the University of Tokyo and NTT has demonstrated quantum entanglement generation at 60 gigahertz, surpassing classical computer clock speeds. ## Article Researchers at the University of Tokyo, working with NTT, have achieved a breakthrough that may reshape the trajectory of optical quantum computing. [Published in Nature Photonics in January 2025](https://www.nature.com/articles/s41566-024-01589-7), the team demonstrated quantum entanglement generation at speeds more than 1,000 times faster than previous methods, pushing the operational frequency to 60 gigahertz. The implications are significant. Quantum entanglement serves as the foundational resource for quantum computing, quantum communication, and error correction. Until now, generating it reliably at high speeds has been a stubborn obstacle. Previous optical quantum entanglement systems operated at kilohertz to megahertz rates, which translated to clock frequencies slower than those of conventional classical computers. ## The Technical Innovation The breakthrough centers on a device called an optical parametric amplifier (OPA), developed jointly by the University of Tokyo and NTT. Unlike the optical parametric oscillators (OPOs) traditionally used in quantum optics experiments, the OPA operates in the terahertz bandwidth, enabling much faster pulse generation. The challenge with OPAs has always been noise. Moving to higher speeds typically meant accepting more interference, which degrades the delicate quantum states needed for useful computation. The Tokyo-NTT team solved this by using a second OPA to amplify the signal in a way that preserves quantum coherence. The result: real-time measurement of quantum entanglement at picosecond timescales, a world first. What makes this noteworthy is that the 60 GHz generation rate exceeds the clock frequencies of today's fastest classical computers. In a field where quantum systems have historically lagged behind their classical counterparts in raw speed, this represents a reversal of that dynamic. ## Why Light Matters Optical quantum computers offer structural advantages over superconducting systems, which require near-absolute-zero temperatures and complex refrigeration infrastructure. Light-based systems can operate at room temperature and integrate naturally with existing fiber-optic telecommunications networks. This compatibility with established infrastructure makes commercialization pathways considerably shorter. Professor Akira Furusawa, who leads the research effort at Tokyo, has long argued that photonic approaches will ultimately dominate the field. His team uses a time-domain multiplexing technique that creates quantum entanglement by looping light through circuits, avoiding the need to physically expand hardware as computational scale increases. This is a fundamentally different architecture than the [brute-force scaling approach](/news/jensen-huang-says-agentic-ai-requires-1000x-more-compute-than-generative-ai-here/) seen in conventional chip design. ## The Path to Commercialization The research has already spawned a startup. OptQC, founded in September 2024 by members of Furusawa's lab, is working to bring optical quantum computers to market. The company aims to deploy a commercial system by April 2026 and has secured partnerships with NTT to pursue scalability targets of one million qubits by 2030. NTT's interest is strategic. The company views optical quantum computing as complementary to its IOWN next-generation communications infrastructure, which relies heavily on photonics. If quantum processors can interface seamlessly with optical networks, the architecture of future data centers could look very different than current designs. OptQC is currently developing a 10,000-qubit optical quantum computer under a NEDO project. The firm raised 650 million yen in seed funding and was recently featured in Forbes Japan's 2026 entrepreneur rankings. ## What It Means for Consumer Electronics The road from laboratory demonstration to consumer devices is long, but there are plausible pathways. Optical quantum systems operating at room temperature could eventually be integrated into compact form factors, unlike superconducting machines that require dedicated cooling infrastructure. More immediately, the technology is likely to find applications in cloud-accessible quantum services. RIKEN has already announced plans to make an optical quantum computer available on the cloud, built using methods from Furusawa's group. If these services mature, businesses and researchers could access optical quantum acceleration without owning specialized hardware. For consumer electronics, the more relevant impact may come indirectly. Quantum systems excel at optimization problems, which underpin everything from battery management algorithms to [edge AI inference](/news/hitachis-edge-ai-chip-bets-the-future-of-robotics-on-local-intelligence/). Devices could offload specific computational tasks to quantum cloud services, improving performance in applications like image processing, logistics routing, or [AI-driven automation](/news/google-unveils-gemini-intelligence-a-new-ai-layer-aimed-at-automating-the-tedium/). The 1,000x speed improvement also addresses a fundamental concern about quantum computing's practical utility. If quantum systems cannot match classical computers on raw operational speed, their advantages in parallelism become harder to exploit. This research changes that calculus. Whether these advances translate into products within a decade remains uncertain. But the combination of room-temperature operation, telecommunications compatibility, and now competitive clock speeds makes optical quantum computing a serious contender in the race toward practical quantum advantage. --- **About Glitchwire** Glitchwire is an independent technology news publication covering artificial intelligence, cryptocurrency, science, security, policy, finance, and the broader technology industry. 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