Source-linked quantum computing news and analysis on hardware, research, applications, post-quantum security, business and policy.
Publication date where available; source report or sources-checked date otherwise.
A neutral-atom co-design study connects physical noise, logical operations and application costs. Its resource gains remain conditional simulation results.
A finite-horizon control proposal targets selected cost and control estimates. Its complexity bounds require structured data access and bounded stability parameters.
Three demonstrators bring core error-correction operations onto hardware. The company explicitly says its logical error rate is not yet below threshold.
A scan of 136,711 app binaries found little detectable post-quantum code. That measures one layer of a connection, with important limits.
The companies plan deeper integration around Crux. The release does not disclose the investment amount or turn a consortium selection into recognised revenue.
The supplier links its light subsystems to Infleqtion’s sensor work. The referenced $20 million follow-on award was announced in August and belongs to Infleqtion.
Alexandru Paler, Simon Devitt and Artur Izmaylov also join. Their advisory roles concern scientific direction, with product performance requiring its own evidence.
A scanning-probe study defines how to measure etched device edges. The contribution is a reproducible measurement method, with the link to qubit lifetime still to establish.
HyQ-LC improves on selected neural controls in a classical simulation. Its stronger tree reference and unresolved branch contribution keep the result in perspective.
An analysis of small entangled photon states tracks false heralds and distinct error channels. Conditional state quality alone does not measure useful output.
A propagation-assisted scheme lowers logical failure in specified simulated Clifford circuits. Runtime and memory scaling remain unquantified.
More than 600 optical sites bring uniformity, alignment and stability into focus. Cavity count is not an entangled-qubit count.
A classical emulator reproduces selected tests used in photonic advantage claims. Passing those tests does not make every sampling problem easy.
A proposed hybrid workflow includes selected nuclear quantum effects. Numerical validation addresses forces and motion without claiming hardware advantage.
Quantinuum’s H2 reproduces a molecular spectral feature in a 21-spin model. Resolution and full computing cost remain the practical tests.
Superconducting processors probe competing order in a programmed spin model, with finite-size and finite-depth limits attached.
A tunable capacitor improves charge detection in two-dimensional devices. The October announcement describes a study published in August.
A two-laser microresonator advances one link in an optical clock’s measurement chain. A portable instrument needs more than a smaller comb.
A trapped-ion experiment uses both internal spins and collective motion to represent field dynamics. The journal publication follows a 2025 preprint.
Two ion motional modes undergo a coherent exchange operation. The gate’s exponential name describes its mathematics, not a speed advantage.
ConQUESTA evaluates pruning after compilation under an accuracy constraint. Hardware connectivity changes which deletions save useful resources.
Three diamond nuclear spins perform an eight-state Grover search at ambient conditions. Algorithm success differs from individual gate fidelity.
A levitated nanoparticle resolves tiny mechanical impulses from gas molecules. Detection thresholds and event selection determine what can be counted.
A rectangular surface-code memory improves as one dimension grows. Longer sequences reveal why the duration of the test matters too.
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A little perspective on a fast-moving field.
