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Remote entanglement between error-corrected GKP logical qubits, linking two trapped-ion systems via photons, is a meaningful step toward networking fault-tolerant quantum processors. The reported 95% fidelity is a single-experiment result, so readers should check how it scales with distance, photon loss, and repeated operations. The work mainly recombines existing motional-control and photonic techniques, so its practical value depends on whether it can be reproduced and extended.

Surse care acoperăQuantum Zeitgeist, Quantum Computing Report, Latent Space, LessWrong

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Researchers Generate Remote Entanglement at 95% Fidelity

Quantum Zeitgeist16 octombrie 20264 min de cititArticolul și perspectiva sunt în engleză.

Overcoming qubit decoherence during entanglement distribution has long limited scalable quantum networking. A new protocol achieves over 95% fidelity for remotely generating entangled states between error-corrected qubits using established trapped-ion techniques and photon interactions. This represents a practical step forward by combining existing experimental capabilities to improve upon previous methods prone to errors.

Distributing entanglement directly between error-corrected logical qubits presented challenges for scalable quantum networks; fidelity was limited by qubit decoherence and errors during photon generation. Remotely entangled Gottesman, Kitaev, Preskill (GKP) qubits have been achieved, a type of error-correcting code, between spatially separated trapped ions with over ninety-five percent fidelity. This breakthrough combines established techniques in motional control and photonic networking to improve upon previous methods. Remotely entangled Gottesman, Kitaev, Preskill…

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