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.
The state can arrive without a travelling original. But the receiver still needs a message, the sender loses the state, and the connection gets used up.
Repeated results can look inconsistent even on a perfect quantum device. The useful answer often lives in the pattern that emerges across many runs.
Qolab will be a lead customer for SkyWater's SC250 wafer platform, but the partners disclosed no new quantum-processor benchmark or shipment.
A simulated quantum classifier gained 1.6 percentage points by feeding new sensor features into small side modules—not by simply adding circuit capacity.
H2 beat the optimal classical score in an efficiently checked experiment, but this was a device test—not a useful computational speedup.
A proposed superconducting circuit uses two resonator paths to suppress idle coupling, but its speed and error figures remain simulation results.
Amazon Braket can reject quantum tasks before they exceed a device limit, but that control is not a ceiling on the whole cloud bill.
A ten-transmon experiment routes data by quantum address, while 82.4% two-layer fidelity and discarded runs expose the scaling cost.
A preprint using Google Willow records separates predicting error rates from choosing error-correction software.
A conference benchmark reports lower EPR-pair use than QuComm, but only in simulation and under a matched communication protocol.
Peer-reviewed measurements link a semiconductor hole spin to 1.55-micrometre photons, but this remains an interface experiment—not a network node.
Physical qubits are the hardware. Logical qubits are error-protected systems built from them—and the conversion is never a universal ratio.
A simulated trapped-ion architecture kept decoding delay below 12% across three compiled workloads, but no fault-tolerant quantum computer ran the experiment.
A new Japanese roadmap spells out the light sources, detectors and control hardware that must improve before photonic systems can scale.
Chemicals, batteries and pharmaceuticals are among the clearest candidates for early gains. Their breakthroughs could reach you through everyday products.
A new Delft unit will combine European components into complete superconducting quantum computers and develop a repeatable integration process.
Superconducting rails help detectors reach 0.1 millimetres in width while reducing false signals—a useful step toward larger optical sensors.
A superconducting design divides storage and interaction between two coupled modes, with faster gates predicted in simulations.
A planned Danish foundry would give quantum-hardware teams another place to manufacture their chips.
The funding opportunity asks teams to show how an entire application benefits, with a defined end user and credible classical comparisons.
Princeton-led MARQUIS will bring materials science and semiconductor processing to the Josephson junction, a core superconducting-qubit component.
The newly inaugurated quantum computer is operational, with qualification, broader access and supercomputer integration still progressing.
Nighthawk r2 attacks the pause between runs. Its three headline numbers describe different things, and should stay that way.
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A little perspective on a fast-moving field.
