GS Zhou
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Key Lab of Quantum Information of CAS (Chinese Academy of Science) recently makes a new breakthrough in quantum technology. A quantum transducer for OAM (Orbital Angular Momentum) 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. The 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.
The key research results are published in the [Light: Sci. & Appl. 5, e16019 (2016)], and [Phys. Rev. Lett. 117, 103601(2016)]
Background:
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.
中国实现轨道角动量光子的量子频率转换
发布时间:2016-09-01 【字号: 小 中 大 】
中国科学院院士、中国科学技术大学教授郭光灿领导的中科院量子信息重点实验室在轨道角动量(OAM)光子的量子频率转换研究领域取得系列进展:该实验室教授史保森领导的小组在国际上首次实现了OAM单光子、OAM纠缠光子以及OAM与偏振组成的混合纠缠光子的频率上转换,证明了在频率变换过程中单光子的量子相干性和光子对的纠缠特性保持不变。主要研究成果分别发表在《光:科学与应用》和8月29日的《物理评论快报》上。论文的第一作者为博士后周志远。
The key research results are published in the [Light: Sci. & Appl. 5, e16019 (2016)], and [Phys. Rev. Lett. 117, 103601(2016)]
Background:
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.
中国实现轨道角动量光子的量子频率转换
发布时间:2016-09-01 【字号: 小 中 大 】
中国科学院院士、中国科学技术大学教授郭光灿领导的中科院量子信息重点实验室在轨道角动量(OAM)光子的量子频率转换研究领域取得系列进展:该实验室教授史保森领导的小组在国际上首次实现了OAM单光子、OAM纠缠光子以及OAM与偏振组成的混合纠缠光子的频率上转换,证明了在频率变换过程中单光子的量子相干性和光子对的纠缠特性保持不变。主要研究成果分别发表在《光:科学与应用》和8月29日的《物理评论快报》上。论文的第一作者为博士后周志远。