2016/05/30 by Zhi‐Yuan Zhou, Zhi-Yuan Zhou, Shi-Long Liu +10 · 94 citations
Computer Science · Physics and Astronomy · #Angular momentum #Orbital Angular Momentum in Optics #Photon #Photon entanglement #Physics #Quantum #Quantum Information and Cryptography #Quantum channel #Quantum entanglement #Quantum information #Quantum information science #Quantum key distribution #Quantum mechanics #Quantum metrology #Quantum network #Quantum optics and atomic interactions #Quantum sensor #Quantum teleportation #Qubit #physics.optics #quant-ph
paper · pdf · doi:10.1103/physrevlett.117.103601
published in Physical Review Letters 117(10), 103601 (American Physical Society) · under review in PRL, comments are welcom
arxiv created 2016/05/30 · openalex publication_date 2016/08/29 · arxiv updated 2016/08/31 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Entanglement is a vital resource for realizing many tasks such as teleportation, secure key distribution, metrology, and quantum computations. To effectively build entanglement between different quantum systems and share information between them, a frequency transducer to convert between quantum states of different wavelengths while retaining its quantum features is indispensable. Information encoded in the photon's orbital angular momentum (OAM) degrees of freedom is preferred in harnessing the information-carrying capacity of a single photon because of its unlimited dimensions. A quantum transducer, which operates at wavelengths from 1558.3 to 525 nm for OAM qubits, OAM-polarization hybrid-entangled states, and OAM-entangled states, is reported for the first time. Nonclassical properties and entanglements are demonstrated following the conversion process by performing quantum tomography, interference, and Bell inequality measurements. Our results demonstrate the capability to create an entanglement link between different quantum systems operating in a photon's OAM degrees of freedom, which will be of great importance in building a high-capacity OAM quantum network.