文献类型：期刊文献

英文题名：Unidirectional quantum-optical elements for waveguide-QED with subwavelength Rydberg-atom arrays in free space

作者：Zhang, Lida[1];Yang, Fan[2];Molmer, Klaus[2];Pohl, Thomas[3]

机构：[1]East China Univ Sci & Technol, Sch Phys, Shanghai 200237, Peoples R China;[2]Univ Copenhagen, Niels Bohr Inst, Ctr Hybrid Quantum Networks, Blegdamsvej 17, DK-2100 Copenhagen, Denmark;[3]TU Wien, Inst Theoret Phys, Wiedner Hauptstr 8-10-136, A-1040 Vienna, Austria

年份：2025

卷号：3

期号：3

起止页码：256

外文期刊名：OPTICA QUANTUM

收录：WOS:【ESCI(收录号:WOS:001529641000005)】；

基金：Carlsberg Foundation ("Semper Ardens" Research Project QCooL) ; Danmarks Grundforskningsfond (Center of Excellence for Hybrid Quantum Networks (DNRF139) , Center of Excellence "CCQ" (DNRF152) ) ; Austrian Science Fund (10.55776/COE1) ; European Commission (NextGenerationEU, Horizon Europe ERC Synergy Grant SuperWave 101071882) .

语种：英文

摘要：We describe an approach to achieve near-perfect unidirectional light-matter coupling to an effective quantum emitter that is formed by a subwavelength array of atoms in the Rydberg-blockade regime. The nonlinear reflection and transmission of such two-dimensional superatoms are exploited in different interferometric setups for the deterministic generation of tunable single photons and entangling two-photon operations with high fidelities, F greater than or similar to 0.999. The described setup can function as a versatile nonlinear optical element in a free-space photonic quantum network with simple linear elements and without the need of additional mode confinement, optical resonators, or optical isolators. Published by Optica Publishing Group under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.