A high-performance quantum memory for quantum interconnects

• URL: http://arxiv.org/abs/2603.01156v1
• Date: Sun, 01 Mar 2026 15:40:47 GMT
• Title: A high-performance quantum memory for quantum interconnects
• Authors: H. -X Luo, C. Li, J. -L. Ren, Y. Yuan, Y. -L. Wen, J. -F. Li, Y. -F. Wang, S. -C. Zhang, H. Yan, S. -L. Zhu,
• Abstract summary: We introduce quantum interconnect rate to comprehensively quantify quantum memories.<n>We demonstrate a high-performance quantum memory that simultaneously integrates three essential criteria at once.<n>We estimate a distribution of 3.56 bits of quantum information over a 1000-km repeater link in one minute.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Single photons are the flying qubits of choice for distributing entanglement in a quantum internet. Quantum memories embedded in quantum repeaters are crucial to overcome transmission loss and enhance the rate of quantum communication. A multimode memory can further boost the channel capacity. However, benchmarking and building a practical quantum memory that simultaneously optimizes multiple performance metrics poses two key challenges. Here, we introduce quantum interconnect rate to comprehensively quantify quantum memories, and further demonstrate a high-performance quantum memory that simultaneously integrates three essential criteria at once: large multimode capacity, high efficiency, and high fidelity. Operating on 11-dimensional spatial modes, our memory achieves a uniform efficiency exceeding 80% and qubit storage fidelities above 99%, enabling the efficient storage of high-dimensional qudits. Based on these capabilities, we estimate a distribution of 3.56 bits of quantum information over a 1000-km repeater link in one minute, highlighting a practical pathway toward scalable quantum interconnects and quantum networks.

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