Latest data updates for Quantum Theory Tracker.https://watchboard.dev/en-ushttps://watchboard.dev/quantum-theory/#digest-2026-05-19/https://watchboard.dev/quantum-theory/#digest-2026-05-19/Five new events added covering April–May 2026 quantum computing milestones. QuEra, Harvard, and MIT demonstrated a 2:1 physical-to-logical qubit ratio using qLDPC codes on neutral-atom hardware, entering the 'Teraquop' error-rate regime (Apr 21). Q-CTRL claimed practical quantum advantage for a Fermi-Hubbard model simulation — 3,000× faster than classical alternatives — on IBM Quantum hardware using Fire Opal error suppression (May 6). China's Origin Quantum launched Wukong-180, a fourth-generation 180-qubit superconducting computer built on domestic components (May 9). Caltech and UCSD proposed a 3D passive self-correcting quantum memory that may eliminate active error correction overhead (May 13), and Kyoto University developed instant W-state detection enabling quantum network routing (May 13). Map points added for QuEra (Boston) and Origin Quantum (Hefei). Claims updated to reflect Q-CTRL's practical advantage claim. Mikhail Lukin (QuEra/Harvard co-founder) added to Key Figures.Tue, 19 May 2026 00:00:00 GMTdailyhttps://watchboard.dev/quantum-theory/#digest-2026-05-13/https://watchboard.dev/quantum-theory/#digest-2026-05-13/Caltech & UCSD Propose 3D Passive Self-Correcting Quantum Memory. Researchers at Kyoto University develop a method for instantaneous detection of quantum W-states — a class of multipartite entangled states critical for quantum communication and networking.Wed, 13 May 2026 00:00:00 GMTdailyhttps://watchboard.dev/quantum-theory/#digest-2026-05-09/https://watchboard.dev/quantum-theory/#digest-2026-05-09/China Launches Origin Wukong-180: Fourth-Generation 180-Qubit Quantum Computer.Sat, 09 May 2026 00:00:00 GMTdailyhttps://watchboard.dev/quantum-theory/#digest-2026-05-06/https://watchboard.dev/quantum-theory/#digest-2026-05-06/Q-CTRL announces evidence of practical quantum advantage for materials science — simulation of the Fermi-Hubbard model — using IBM Quantum hardware with its Fire Opal error suppression software.Wed, 06 May 2026 00:00:00 GMTdailyhttps://watchboard.dev/quantum-theory/#digest-2026-04-21/https://watchboard.dev/quantum-theory/#digest-2026-04-21/QuEra, Harvard & MIT Achieve 2:1 Physical-to-Logical Qubit Ratio.Tue, 21 Apr 2026 00:00:00 GMTdailyhttps://watchboard.dev/quantum-theory/#digest-2026-04-19/https://watchboard.dev/quantum-theory/#digest-2026-04-19/Added seven new timeline events covering 2025–2026 quantum computing milestones: NIST's HQC fifth post-quantum algorithm (Mar 2025), Fujitsu/RIKEN's 256-qubit processor (Apr 2025), IonQ's world-record 99.99% gate fidelity (Oct 2025), Google's Quantum Echoes verifiable 13,000× speedup (Oct 2025), Quantinuum Helios commercial launch with 99.921% fidelity (Nov 2025), IBM Nighthawk processor (Nov 2025), and Google's updated Q-Day estimate of 2029 (Mar 2026). KPIs updated with 2025 market size (~$1.8B), new gate-fidelity KPI, and Q-Day threat estimate. Four new map points added: IonQ (College Park MD), RIKEN/Fujitsu (Wako, Japan), Quantinuum (Broomfield CO). New claim added on Q-Day imminence debate. Three new key figures added: Jay Gambetta (IBM), Hartmut Neven (Google), Ilyas Khan (Quantinuum).Sun, 19 Apr 2026 00:00:00 GMTdaily