集成固态光量子存储器件研究进展

Progress of integrated solid-state photonic quantum memory

集成量子存储器在大规模量子网络建设中将扮演核心作用。近年来,人们致力于实现高性能集成光量子存储器件,其中基于稀土掺杂固体材料的集成固态光量子存储器件具有显著优势。此类量子存储器有望支持长时间、高效率、高保真、大带宽和多模式的光量子存储,还易与其他量子功能器件直接集成,发展全集成的量子信息器件。回顾了不同集成固态光量子存储器件的研究进展,包括掺铒石英光纤、钛扩散掺杂铌酸锂波导、飞秒激光直写掺杂波导和聚焦离子束刻蚀掺杂器件等,比较分析了各自的特点、潜力和挑战。

Integrated quantum memory plays a crucial role in large-scale quantum networks.Over the past years,rare-earth ions doped solid-state materials have shown significant advantages in achieving high-performance integrated photonic quantum memory.This kind of photonic quantum memory enables photonic quantum storage to have long storage time,high efficiency,high fidelity,large bandwidth and multimode capacity,and can also be integrated with other quantum functional devices.This paper reviews progress of integrated photonics quantum memories with various devices fabricated in rare-earth ions doped solid-state materials,such as erbium doped silica fibers,titanium-indiffused LiNbO 3 waveguides,femtosecond laser micromachining waveguides,and focused ions beam etching photonic devices.It also discusses the merits and potential of those photonics quantum memories and the challenges.