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Researchers have demonstrated a significant breakthrough in quantum computing by generating an entangled Bell pair across 100 superconducting qubits with a fidelity of 59%, surpassing the critical threshold required for reliable entanglement certification. This achievement relies on a novel error-detection scheme that mitigates mid-circuit measurement errors inherent in dynamic circuits, enabling scalable architectures without consuming additional physical qubits. The result validates the feasibility of long-range quantum connections essential for future distributed quantum networks and fault-tolerant processors.

Surse care acoperăQuantum Zeitgeist, QuTech

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Researchers Build Entangled Bell Pair Spanning 100 Qubits with 59% Fidelity

Quantum Zeitgeist6 octombrie 20265 min de cititArticolul și perspectiva sunt în engleză.

Entangling 100 qubits with current technology typically yields unreliable connections, but a new demonstration achieves a fidelity of 0. 59±0. 02, exceeding a key threshold for entanglement certification that previous methods failed to meet.

Errors limiting long-range entanglement generation via dynamic circuits have arisen from mid-circuit measurements scaling with system size. An error-detection scheme now trades some accuracy for reduced demands on classical processing without requiring extra qubits. A new technique enhances the reliability of quantum circuits used to create long-range entanglement, a key resource for building more powerful computers. The method balances potential inaccuracies by increasing data filtering requirements without adding components to the system. Demonstration on superconducting quantum hardware confirms that creating and sustaining entangled states, essential for many…

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