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 distributed simulation models a 104-qubit protocol with a smaller evolving representation. Memory, runtime and noise assumptions define the result.
Two network nodes combine strontium links with calcium storage. The four-atom demonstration makes the division of labor visible.
Helios improves a logical-memory benchmark and separately tests protected Clifford operations. The statistics and workload define what each rate means.
A theory study separates locally corrected errors from the phase revealed when two memories are compared. References and readout define the claim.
A framework compares analytical, simulated and learned fidelity estimates. Fast predictions still need validation against the network they describe.
SpinControl connects configurable instruments, calibration and circuit execution. Reproducibility depends on retaining the physical settings behind each result.
A fixed spectral query improves learning on small matched tasks. The result tests model design rather than a deployed radar system.
C4-Helix tests correction, operations and a code interface on Helios. Its September results have a separate scope from October’s color-code report.
A 20-kilometer fiber experiment tests three-bit waveform generation. Its positive asymptotic key estimate retains the security model and sampling costs.
Explicit circuits expose the arithmetic behind a prescribed-field plasma model. State preparation, output and self-consistent feedback remain distinct costs.
Charge sensing gives zinc oxide devices a diagnostic tool. Spin control and coherence remain separate milestones to demonstrate.
A numerical study makes the location of phase controls part of the state-preparation search.
Recent context from October 8–12: fabricated visible-light components illustrate why inverse design must include manufacturing tolerance.
A dissipative many-body study asks which environmental transitions preserve an unusual oscillatory structure.
A photonic analog experiment makes the surviving state and the probability of reaching it part of the same story.
A superconducting simulation tests signatures of a known critical transition while finite-size and preparation effects remain part of the result.
An October 13 theory study compares broadband amplifier noise under matched response and coupling constraints.
A Rydberg study shows how corners, array parity and preparation history shape finite-system ordering.
A new research release makes signature aggregation a question about the complete proof package and its verification contract.
A simulation study asks how reinforcement learning performs when control feedback is limited and noisy.
A broad capacity preprint highlights how energy and error definitions shape the claimed optical communication limit.
A theoretical cat-state study asks how many acceptable outputs one fixed optical setting can produce.
A theoretical control study asks how partial knowledge of static errors changes the shortest cancellation cycle.
A two-photon timing study uses additional outcome categories to reduce a loss-calibration dependence.
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A little perspective on a fast-moving field.
