Latest Quantum Research & Methods News
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Jun- 2026 -1 JuneIndustry
D-Wave Bets Its Future on Gate-Model Quantum Computing with 2032 Fault-Tolerance Roadmap
D-Wave's first Investor Day roadmap targets 100 fault-tolerant logical qubits by 2032 using dual-rail superconducting qubits. The annealing pioneer enters a crowded gate-model race with an unproven architecture and ambitious error-reduction targets.
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May- 2026 -29 MayQuantum Security & PQC
ETH Zurich’s “Perfect Randomness”: What Actually Happened
A new preprint series claims to break every major lattice-based NIST PQC standard via an improved CDPR attack. The claim has critical technical gaps that the lattice cryptography community will need to resolve.
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25 MayQuantum Security & PQC
A New Paper Claims to Break ML-KEM, Falcon, Hawk, and NTRU. Should You Worry?
A new preprint series claims to break every major lattice-based NIST PQC standard via an improved CDPR attack. The claim has critical technical gaps that the lattice cryptography community will need to resolve.
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23 MayResearch
IBM’s Concatenated Gross Code Reaches the Teraquop Regime
IBM's QEC team packages 11 logical qubits into a single high-dimensional qudit and wraps the gross code in quantum Reed-Solomon algebra. The result: a fault-tolerant memory that reaches the teraquop regime the gross code couldn't previously access.
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16 MayResearch
Jiuzhang 4.0: China’s 1,024-Input Photonic Processor Claims 10⁵⁴ Speedup
Pan Jian-Wei's team published a rigorous Nature paper showing an order-of-magnitude leap in photonic quantum scale. The engineering is impressive. The "quantum supremacy" framing from state media is a different matter entirely.
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13 MayResearch
Theorists Prove Passive Quantum Memory Works in Three Dimensions, Settling a 25-Year-Old Question
A Caltech–UCSD team has constructed a 3D quantum system that can store a qubit for exponential time without active error correction. The result settles a question that has resisted the field's best efforts for a quarter century.
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6 MayIndustry
Q-CTRL Achieves Practical Quantum Advantage — and the Business Signal May Be Bigger Than the Physics
Q-CTRL's 120-qubit simulation of the Fermi-Hubbard model achieves quantitative accuracy matching classical benchmarks while completing in minutes rather than days. The "practical quantum advantage" claim deserves scrutiny, but the underlying technical achievement is real.
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2 MayResearch
IBM’s Quantum Advantage Claim: What the Heron-Fugaku Experiment Actually Shows
IBM says quantum advantage arrives in 2026. A new Heron-Fugaku experiment provides the evidence. Whether it proves the claim depends on how you define “advantage.”
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Apr- 2026 -23 AprilResearch
IonQ Publishes Complete Fault-Tolerant Blueprint for Trapped Ions “The Walking Cat Architecture”
IonQ's 110-page preprint details a complete fault-tolerant quantum computer architecture built entirely on qLDPC codes. The numbers are impressive, but every claim rests on hardware that doesn't yet exist at scale.
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23 AprilQuantum Security & PQC
Chinese Researchers Cut ECC Qubit Requirements to 1,333 with Open-Source Circuits
A Tsinghua–Peking University team achieves 1,333 logical qubits for ECC-256 with fully explicit, open-source quantum circuits. The gate count may matter more than the qubit count.
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21 AprilResearch
Nature Reviews Publishes the Definitive CMOS–Spin Qubit Compatibility Assessment
A comprehensive review from Dzurak's team maps exactly where silicon spin qubits align with existing CMOS manufacturing — and where they diverge. The implications for scaling to millions of qubits are more nuanced than the headlines suggest.
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20 AprilResearch
QuEra Achieves 2:1 Physical-to-Logical Qubit Ratio With Ultra-High-Rate qLDPC Codes
A QuEra–Harvard–MIT collaboration demonstrates qLDPC codes that encode more logical qubits than they consume in overhead — a 2:1 physical-to-logical ratio that enters the Teraquop regime. This is a simulation result, not an experiment. But if it holds up, it rewrites the economics of fault-tolerant quantum computing.
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11 AprilResearch
Harvard’s Cascade Neural Decoder Cuts Quantum Error Rates 17×, Reveals Waterfall Effect
Harvard's Cascade decoder achieves logical error rates 17× below the best existing decoders on quantum LDPC codes and reveals a "waterfall" regime of error suppression that could reduce the physical qubit count required for a CRQC by 40% or more.
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9 AprilQuantum Security & PQC
Architecture Matters as Much as the Algorithm: Q-CTRL’s Heterogeneous Quantum Computer Design Cuts RSA-2048 to 190k-381k Qubits
9 Apr 2026 - Researchers at Q-CTRL, a quantum infrastructure software company headquartered in Los Angeles and Sydney, have published a paper introducing Q-NEXUS, a heterogeneous quantum computing architecture that claims to reduce the physical qubit requirements for factoring 2048-bit RSA integers to as few as 190,000 physical qubits — a roughly 4.7× reduction from the current monolithic baseline. The…
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5 AprilResearch
QuiX Quantum Achieves First Below-Threshold Error Mitigation in Photonic Quantum Computing
5 Apr 2026 - QuiX Quantum, a Netherlands-based photonic quantum computing company, announced it has demonstrated below-threshold error mitigation on a photonic quantum computer for the first time, in collaboration with NASA's Quantum Artificial Intelligence Laboratory (QuAIL), the University of Twente, and Freie Universität Berlin. The result, described in a pre-print on arXiv currently undergoing peer review, demonstrates a technique…
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