Forschungszentrum Jülich Demonstrates 6.8-Nanosecond Single-Qubit Gates with > 99.98% Fidelity via Multi-Photon Leakage Suppression

quantumcomputingreport.com Oct 31, 2026

Forschungszentrum Jülich Demonstrates 6.8-Nanosecond Single-Qubit Gates with > 99.98% Fidelity via Multi-Photon Leakage Suppression

Curated by Shubham · TechCapsules · Oct 31, 2026

AI-summarised brief · reviewed before publication

Physicists at Forschungszentrum Jülich, RWTH Aachen, and the University of Cologne have demonstrated 6.8‑nanosecond single‑qubit gates on a superconducting transmon processor with fidelities above 99.98 %. Published in Nature Communications, the work introduces the “R2D” pulse‑shaping technique, which suppresses multi‑photon leakage into non‑computational states by nulling spectral components at two‑photon transition frequencies. The method reduces leakage by more than a factor of 20 compared to standard DRAG protocols, setting a new speed record for high‑fidelity transmon operations.

💡 Why It Matters

· The breakthrough shows that ultrafast, ultra‑accurate qubit control is achievable, tightening the gap between gate speed and error rates that limits scalable quantum computing.

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TU Delft Achieves Direct Single-Atom Nuclear Magnetic Resonance via Scanning Tunneling Microscope…

Physicists at Delft University of Technology’s Kavli Institute of Nanoscience demonstrated direct nuclear magnetic resonance control of a single surface‑adsorbed atom using a scanning tunneling microscope (STM) at 0.4 K and 1.4 T. The team introduced an Electron‑Nuclear Double Resonance (ENDOR) scheme that drives the 47Ti nucleus in the 50–85 MHz range while reading out the electronic spin at GHz frequencies. This achievement shows that isolated nuclear spins can be coherently addressed without hyperfine hybridization, offering a pathway to atomic‑scale quantum memory and high‑dimensional qudits.

💡 The work proves that nuclear spins can be manipulated directly at high magnetic fields, preserving their long coherence times. This capability could enable scalable, noise‑immune quantum registers built on engineered surface lattices.

thequantuminsider.com · Oct 31

SUNY Chancellor Highlights Quantum and Energy Research at Stony Brook

SUNY Chancellor John B. King Jr. visited Stony Brook University to showcase the campus’s cutting‑edge research in quantum computing, energy, healthcare, artificial intelligence, and environmental science. He toured the Advanced Energy Research and Technology Center, attended a research expo, and met faculty working on distributed quantum processing, nuclear energy, battery technology, clean water, and precision medicine. The visit underscored SUNY’s strategy to expand systemwide research, highlighted collaborations with Brookhaven National Laboratory, and emphasized the university’s role in addressing global challenges.

💡 The Chancellor’s tour signals a renewed commitment to positioning New York State as a leader in high‑impact science, directly linking academic breakthroughs to economic growth and public health improvements.

quantumcomputingreport.com · Oct 31

Lumen Expands Quantum Footprint with Ohio State Fiber Research and Fortinet PQC…

Lumen Technologies announced a dual‑initiative program to advance quantum networking and secure enterprise connectivity. The company will partner with Ohio State University to test non‑classical light transmission over commercial fiber, establishing limits for quantum repeaters and exploring distributed sensing for fiber health. Simultaneously, Lumen is integrating Fortinet’s post‑quantum cryptography libraries (ML‑KEM and ML‑DSA) into its managed Secure Access Service Edge platform, enabling enterprises to migrate from RSA and elliptic‑curve schemes without hardware changes. The rollout also includes a pilot with Emerald AI to route AI workloads based on grid availability.

💡 By validating quantum‑friendly fiber and embedding PQC into mainstream SASE, Lumen positions itself at the forefront of next‑generation secure networking, offering customers a practical path to future‑proof infrastructure.

thequantuminsider.com · Oct 31

Netpoleon India Partners With QNu Labs on Quantum-Safe Security

Netpoleon India has teamed with QNu Labs to broaden quantum‑safe cybersecurity offerings for Indian enterprises. The partnership merges QNu Labs’ QShield 2.0 platform—providing cryptographic risk profiling, operations, governance, and AI‑driven security—with Netpoleon India’s extensive channel partner and system integrator network. Together, they aim to help organizations in banking, government, defense, and telecommunications assess cryptographic exposure, enhance crypto‑agility, and prepare for quantum‑era threats. The collaboration underscores India’s push to strengthen indigenous quantum cybersecurity capabilities.

💡 By linking a cutting‑edge quantum‑safe platform with a wide distribution network, the deal accelerates practical readiness for quantum threats, positioning Indian enterprises to safeguard critical data before quantum computers can compromise current cryptographic systems.

thequantuminsider.com · Oct 31

Infleqtion Tests Optical Atomic Clock During US Navy Exercise

Infleqtion showcased its Tiqker optical atomic clock aboard the U.S. Navy support ship RV Merlin during the Maritime Big Play Pacific (MBP‑P) and BARB‑26 exercises. The device ran continuously for more than two weeks in the Southern California operating area, enduring temperature fluctuations and sustained vibration while the vessel supported manned and unmanned platforms. Tiqker’s quantum‑based timing is designed to function independently of GPS, offering precise synchronization for communications, radar and other onboard systems when satellite signals are jammed, spoofed or unavailable. The trial, part of a joint effort with the Office of the Under Secretary of War for Research & Engineering and AUKUS partners, gathered operational data to assess naval integration and validate real‑world quantum timing performance for future deployments.

💡 By delivering GPS‑independent timing at sea, Tiqker gives warships a resilient chronometer that can keep critical systems synchronized during contested electromagnetic environments.

quantumcomputingreport.com · Oct 31

Quantinuum Chief Scientist Argues Physical Fidelity Trumps Gate Speed in Fault-Tolerant Scaling…

Quantinuum’s chief scientist Harry Buhrman published an essay, “Fidelity First in the Quantum Race,” arguing that physical gate fidelity, not raw gate speed, determines practical time‑to‑solution for fault‑tolerant quantum computers. Buhrman contrasts Quantinuum’s 98‑qubit trapped‑ion system, which achieves 99.9995 % logical memory fidelity on its Helios processor, with superconducting platforms that operate in nanoseconds but suffer higher error rates. He introduces the QUOPS benchmark, which measures both computational reach and wall‑clock speed, and claims that superconducting devices, while faster on small circuits, become thousands of times slower when error‑mitigation overhead is included for large‑scale algorithms. In trapped‑ion hardware, higher fidelity enables exponential logical error suppression with 2D color codes, reducing the space‑time volume needed for applications such as FeMoco modeling or RSA factorization. Buhrman warns that to meet a 2029 commercial target for its fault‑tolerant Apollo system, Quantinuum must speed up ion shuttling, laser cooling, and syndrome decoding without compromising fidelity.

💡 Superior fidelity shrinks the error‑correction overhead, turning quantum advantage from a theoretical possibility into a near‑term, resource‑efficient reality.