2025/08/27 by Ou, Zhong-Wen, Zhu, Tian-Xiang, Liang, Peng-Jun +4
#FOS: Physical sciences #Quantum Physics (quant-ph)
paper · doi:10.48550/arxiv.2508.19605
Integrated photonic quantum memories are essential components for scalable quantum networks and photonic information processors. However, prior implementations have been confined to single-channel operation, limiting their capacity to manipulate multiple photonic pulses and support high-dimensional information. In this work, we introduce an 11-channel integrated quantum memory based on laser-written waveguide arrays in 151Eu3+:Y2SiO5 crystals. On-chip electrode arrays enable independent control over the readout times for each channel via Stark-shift-induced atomic interference. Our device achieves random-access quantum storage of three time-bin qubits with a fidelity exceeding 99%, as well as storage of five-dimensional path-encoded quantum states with a fidelity above 96%. This multichannel integrated storage device enables versatile applications through its random access capability and lays a solid foundation for the development of high-dimensional quantum networks in integrated architectures.