PostQuantum - Quantum Computing, Quantum Security, PQC

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.” ...

The inventor of BosonSampling and new NAS member says reputable QC hardware experts now tell him a cryptanalytic quantum computer should be possible by around 2029 ...

Three U.S. policy moves — NQI reauthorization, a quantum cybersecurity bill, and a Pentagon migration guide — show Washington building plumbing for the quantum transition ...

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 ...

Coinbase assembled heavyweights like Scott Aaronson and Dan Boneh to assess quantum threats to crypto. Their paper is serious, measured, and technically sound. But it underestimates how fast the ground is shifting beneath blockchain cryptography ...

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 ...

IonQ's photonic interconnect demonstration links two commercial quantum computers via entanglement for the first time. The milestone is real and strategically important - but the absence of fidelity and rate numbers in the announcement demands closer scrutiny ...

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 ...

McKinsey’s 2026 Quantum Technology Monitor declares a “commercial tipping point.” The market analysis is useful, but the investment figures still deserve scrutiny ...

Meta’s PQC migration playbook introduces “Migration Levels” as an operating model and describes post-quantum protections already live across internal traffic ...

NVIDIA's Ising family brings AI-driven automation to quantum calibration and error correction decoding — two bottlenecks standing between today's noisy qubits and fault-tolerant quantum computers. The strategic play underneath matters more than the benchmarks ...

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 ...