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Breakthrough Quantum Memory Achieves 94.6% Efficiency in Shanghai

10/22/2025

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Summary

Story summary

Shanghai Jiao Tong University researchers developed a quantum memory achieving 94.6% efficiency and 98.9% fidelity by using an atomic gas to store quantum states.
The atomic-gas storage enhances retrieval and storage, overcoming prior trade-offs between efficiency and noise.
Low-density parity-check (QLDPC) codes show promise for resilient quantum memories, while constant overhead fault tolerance remains essential for practical quantum computing.

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Story summary

Shanghai Jiao Tong University researchers developed a quantum memory achieving 94.6% efficiency and 98.9% fidelity by using an atomic gas to store quantum states.
The atomic-gas storage enhances retrieval and storage, overcoming prior trade-offs between efficiency and noise.
Low-density parity-check (QLDPC) codes show promise for resilient quantum memories, while constant overhead fault tolerance remains essential for practical quantum computing.