Tel Aviv-based Quantum Pulse Ventures (QPV) introduced a new universal directional coupler technology that could dramatically lower the cost and complexity of photonic quantum computers (PQCs). The company claims its innovation reduces fabrication-related physical errors that traditionally require large error-correcting codes to achieve fault-tolerant quantum computation. By lowering error rates at the hardware level, QPV says it can reduce the number of physical qubits needed per logical qubit tenfold or speed up computation by a similar factor. The result could save as much as $900 million from the estimated $1 billion cost of a single PQC.
The breakthrough adapts “compositing pulses,” a control technique that enabled the first MRI machines, into the optical domain for integrated photonics. The new directional coupler minimizes imperfections that would otherwise amplify computation errors beyond the 1% tolerance threshold that quantum error correction can manage. By mitigating these physical errors, PQC builders could shrink system footprints, cut cooling and networking needs, and accelerate time-to-market for practical fault-tolerant quantum systems.
“This technology lowers hardware requirements, reduces run time, and improves robustness against imperfections, bringing scalable, commercial delivery of fault-tolerant photonic quantum computers significantly closer to reality,” said Ofer Shapiro, CEO and co-founder of Quantum Pulse Ventures.
• New universal directional coupler reduces photonic fabrication errors
• Tenfold reduction in qubit requirements or equivalent speedup per logical qubit
• Potential cost savings of up to $900M per PQC
• Technology co-developed with Tel Aviv University and licensed via Ramot
• Board includes leading photonics researchers including Professor Mordechai Segev
🌐 Analysis: Quantum Pulse’s innovation targets one of the hardest bottlenecks in quantum computing—error correction overhead. By addressing fabrication errors at the component level, it aligns with a growing movement toward hardware-native fault tolerance, complementing efforts by companies like PsiQuantum and Xanadu in integrated photonics. If the claimed reduction in qubit count holds up under testing, this could materially shift PQC economics and accelerate the timeline for scalable quantum systems.