A photonic entanglement filter with Rydberg atoms

doi:10.1038/s41566-023-01194-0

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	A photonic entanglement filter with Rydberg atoms
	Ye, Gen-Sheng ; Xu, Biao ; Chang, Yue 1,2; Shi, Shuai ; Shi, Tao 3,4; Li, Lin
刊名	NATURE PHOTONICS
	2023
卷号	17 期号:6 页码:538+
关键词	QUANTUM PURIFICATION
ISSN号	1749-4885
DOI	10.1038/s41566-023-01194-0
英文摘要	An entanglement filter based on Rydberg atoms is demonstrated. It transmits a desired photonic entangled state and blocks unwanted ones. Near-perfect photonic entanglement can be extracted from a noisy input with arbitrarily low initial fidelity. Devices capable of deterministically manipulating photonic entanglement are of paramount importance, because photons are ideal messengers for quantum information. However, due to the non-interacting nature of photons, many photonic quantum operations have only been demonstrated using probabilistic linear-optical approaches, leading to an overwhelming resource overhead and poor scalability. Here we report a novel entanglement filter that transmits the desired photonic entangled state and blocks unwanted ones. In contrast to previous probabilistic approaches, our experiment exploits the strong and controllable photon-photon interaction enabled by Rydberg atoms, so the filtering of undesired states succeeds in every experimental trial. Photonic entanglement with near-unity fidelity can be extracted from an input state with an arbitrarily low initial fidelity. The protocol is inherently robust, and succeeds both in the Rydberg blockade regime and in the interaction-induced dissipation regime. Such an entanglement filter opens new routes towards achieving scalable photonic quantum information processing with multiple ensembles of Rydberg atoms.
学科主题	Optics ; Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/27918]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.Huazhong Univ Sci & Technol, Inst Quantum Sci & Engn, Sch Phys, MOE Key Lab Fundamental Phys Quant MeasurementPGMF, Wuhan, Peoples R China 2.Beijing Automat Control Equipment Inst, Beijing, Peoples R China 3.Quantum Technol R&D Ctr China Aerosp Sci & Industr, Beijing, Peoples R China 4.Chinese Acad Sci, Inst Theoret Phys, Beijing, Peoples R China 5.Univ Chinese Acad Sci, CAS Ctr Excellence Topol Quantum Computat, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Ye, Gen-Sheng,Xu, Biao,Chang, Yue,et al. A photonic entanglement filter with Rydberg atoms[J]. NATURE PHOTONICS,2023,17(6):538+.
APA	Ye, Gen-Sheng,Xu, Biao,Chang, Yue,Shi, Shuai,Shi, Tao,&Li, Lin.(2023).A photonic entanglement filter with Rydberg atoms.NATURE PHOTONICS,17(6),538+.
MLA	Ye, Gen-Sheng,et al."A photonic entanglement filter with Rydberg atoms".NATURE PHOTONICS 17.6(2023):538+.