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Random access and high dimensional integrated quantum memory
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DOI：10.1186/s43074-026-00284-w.png)
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Abstract
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Random-access quantum memory (RAQM) is a fundamental building block for scalable quantum networks and photonic quantum computing. While existing realizations rely on gaseous physical systems, solid-state platforms—particularly integrated architectures—offer distinct practical advantages for scalable deployment. However, current integrated quantum memories are limited to single-channel operation, which precludes both RAQM and the manipulation of high-dimensional photonic states. Here, we demonstrate an 11-channel integrated quantum memory based on laser-written waveguide arrays in an 151Eu3+:Y2SiO5 crystals. On-chip electrode arrays allow independent control of the read-out time in each channel via Stark-shift-induced atomic interference. The device achieves random-access quantum storage of three time-bin qubits with a fidelity exceeding 99%, and stores five-dimensional path-encoded quantum states with a fidelity above 96%. This multichannel integrated quantum memory supports flexible functionality through its random-access operation and establishes a practical hardware platform for high-dimensional quantum networks implemented in integrated architectures.
Journal
IF:
19.1
Papers:
281
Citations:
2.3K
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Cited Papers
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