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High-dimensional frequency conversion in a hot atomic system

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摘要 One of the major difficulties in realizing a high-dimensional frequency converter for conventional optical vortex(COV)modes stems from the difference in ring diameter of the COV modes with different topological charge numbers l.Here,we implement a high-dimensional frequency converter for perfect optical vortex(POV)modes with invariant sizes by way of the four-wave mixing(FWM)process using Bessel–Gaussian beams instead of Laguerre–Gaussian beams.The measured conversion efficiency from 1530 to 795 nm is independent of l at least in subspace l∈{-6,………,6},and the achieved conversion fidelities for two-dimensional(2D)superposed POV states exceed 97%.We further realize the frequency conversion of 3D,5D,and 7D superposition states with fidelities as high as 96.70%,89.16%,and 88.68%,respectively.The proposed scheme is implemented in hot atomic vapor.It is also compatible with the cold atomic system and may find applications in high-capacity and long-distance quantum communication.
作者 张伟航 叶英豪 曾雷 李恩泽 彭景元 丁冬生 史保森 Weihang Zhang;Yinghao Ye;Lei Zeng;Enze Li;Jingyuan Peng;Dongsheng Ding;Baosen Shi(CAS Key Laboratory of Quantum Information,University of Science and Technology of China,Hefei 230026,China;CAS Center for Excellence in Quantum Information and Quantum Physics,University of Science and Technology of China,Hefei 230026,China;Institute for Quantum Control and Quantum Information and School of Physics and Materials Engineering,Hefei Normal University,Hefei 230601,China)
出处 《Chinese Optics Letters》 SCIE EI CAS CSCD 2023年第9期113-117,共5页 中国光学快报(英文版)
基金 supported by the National Key R&D Program of China(No.2017YFA0304800) the Anhui Initiative in Quantum Information Technologies(No.AHY020200) the National Natural Science Foundation of China(Nos.U20A20218,61722510,11934013,11604322,and 12204461) the Innovation Fund from CAS,Youth Innovation Promotion Association of CAS(No.2018490) the Anhui Provincial Key Research and Development Project(No.2022b13020002) the Anhui Provincial Candidates for Academic and Technical Leaders Foundation(No.2019H208)。
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