File: 4 October 2026 · Source date: September 14, 2026 · Nature Nanotechnology
What was done in the experiment?
Minnella, Ouellet, Klein, and Bassett created a four-qubit GHZ entangled state at room temperature in the nitrogen-vacancy center in diamond. The parallel gate took 14.8 microseconds; It was approximately ten times faster than the two consecutive qubit gate arrays compared. The reported parallel gate fidelity is 0.92(4), while the fidelity of the sequential method is 0.69(3). These are the results of the particular experiment; It is not a general speed multiplier for all quantum computers.
Why is it important?
The study demonstrates the benefit of parallel control in preparing multipartite entanglement. The paper highlights the importance of entanglement for quantum algorithms, error correction and detection. Scale-up and transfer to different systems should also be tested. A room temperature experiment does not mean a consumer-ready and error-free quantum computer.
Separating the message through entanglement
Basic physics explanation: entanglement provides relationships between parts of the common state that cannot be explained by classical independence. We cannot force a measurement result to the value we want and send an instant message to the remote side. The speed gain in the experiment is related to a processing time; It is not a claim of communication exceeding the speed of light.
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When evaluating a device, should speed, error rate or scalability be the priority? Answer by stating your intended use.
Resources and further reading
Minnella et al — original article ↗Share your answer
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