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Orbital angular momentum photonic quantum interface

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Light(Science & Applications) 2016年第1期5卷 723-729页

作者： zhi-yuan zhou Yan Li Dong-Sheng Ding Wei Zhang Shuai Shi Bao-Sen Shi Guang-Can Guo Key Laboratory of Quantum Information University of Science and Technology of ChinaHefeiAnhui 230026China Synergetic Innovation Center of Quantum Information&Quantum Physics University of Science and Technology of ChinaHefeiAnhui 230026China

Light-carrying orbital angular momentum(OAM)has great potential in enhancing the information channel capacity in both classical and quantum optical *** distance optical communication requires the wavelengths of light are situated in the low-loss communication windows,but most quantum memories currently being developed for use in a quantum repeater work at different wavelengths,so a quantum interface to bridge the wavelength gap is *** far,such an interface for OAM-carried light has not been realized ***,we report the first experimental realization of a quantum interface for a heralded single photon carrying OAM using a nonlinear crystal in an optical *** spatial structures of input and output photons exhibit strong *** importantly,single-photon coherence is preserved during up-conversion as demonstrated.

关键词： frequency conversion spontaneous parametric down conversion sum frequency generation orbital angular momentum

High-dimensional entanglement between distant atomic-ensemble memories

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Light(Science & Applications) 2016年第1期5卷 451-457页

作者： Dong-Sheng Ding Wei Zhang Shuai Shi zhi-yuan zhou Yan Li Bao-Sen Shi Guang-Can Guo Key Laboratory of Quantum Information University of Science and Technology of ChinaHefeiAnhui 230026China Synergetic Innovation Center of Quantum Information and Quantum Physics University of Science and Technology of ChinaHefeiAnhui 230026China

Entangled quantum states in high-dimensional space show many advantages compared with entangled states in two-dimensional *** former enable quantum communication with higher channel capacity,enable more efficient quantum-information processing and are more feasible for closing the detection loophole in Bell test *** high-dimensional entangled memories is essential for long-distance communication,but its experimental realization is *** experimentally established high-dimensional entanglement in orbital angular momentum space between two atomic ensembles separated by 1 *** reconstructed the density matrix for a three-dimensional entanglement and obtained an entanglement fidelity of(83.9±2.9)%.More importantly,we confirmed the successful preparation of a state entangled in more than three-dimensional space(up to seven-dimensional)using entanglement *** high-dimensional entanglement represents a significant step toward a high-capacity quantum network.

关键词： high-dimensional entanglement orbital angular momentum quantum memory

Quantum twisted double-slits experiments:confirming wavefunctions'physical reality

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Science Bulletin 2017年第17期62卷 1185-1192页

作者： zhi-yuan zhou zhi-Han Zhu Shi-Long Liu Yin-Hai Li Shuai Shi Dong-Sheng Ding Li-Xiang Chen Wei Gao Guang-Can Guo Bao-Sen Shi Wang Da-Heng Collaborative Innovation Center for Science of Quantum Manipulation&Control Heilongjiang Province&Harbin University of Science and TechnologyHarbin 150080China CAS Key Laboratory of Quantum Information University of Science and Technology of ChinaHefei 230026China Department of Physics Harbin University of Science and TechnologyHarbin 150080China Department of Physics and Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices Xiamen UniversityXiamen 361005China

Are quantum states real? This most fundamental question in quantum mechanics has not yet been satisfactorily resolved, although its realistic interpretation seems to have been rejected by various delayedchoice experiments. Here, to address this long-standing issue, we present a quantum twisted double-slit experiment. By exploiting the subluminal feature of twisted photons, the real nature of a photon during its time in flight is revealed for the first time. We found that photons' arrival times were inconsistent with the states obtained in measurements but agreed with the states during propagation. Our results demonstrate that wavefunctions describe the realistic existence and evolution of quantum entities rather than a pure mathematical abstraction providing a probability list of measurement outcomes. This finding clarifies the long-held misunderstanding of the role of wavefunctions and their collapse in the evolution of quantum entities.

关键词： Orbital angular momentum Subluminal group velocity Double slitsWave functions Physical reality

Harmonics-assisted optical phase amplifier

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Light(Science & Applications) 2022年第11期11卷 2748-2754页

作者： Wu-Zhen Li Chen Yang zhi-yuan zhou Yan Li Yin-Hai Li Su-jian Niu Zheng Ge Li Chen Guang-Can Guo Bao-Sen Shi CAS Key Laboratory of Quantum Information University of Science and Technology of ChinaHefeiAnhui 230026China CAS Center for Excellence in Quantum Information and Quantum Physics University of Science and Technology of ChinaHefei 230026China Hefei National Laboratory University of Science and Technology of ChinaHefei 230088China

The change in the relative phase between two light fields serves as a basic principle for the measurement of the physical quantity that guides this *** would therefore be highly advantageous if the relative phase could be amplified to enhance the measurement *** well-known method for phase amplification involves the use of the multi-photon number and path-entangled state known as the NOON state;however,a high-number NOON state is very diffcult to prepare and is highly sensitive to optical *** we propose and experimentally demonstrate in principle a phase amplifer scheme with the assistance of a harmonic generation *** relative phase difference between two polarization modes in a polarized interferometer is amplified coherently four times with cascaded second-harmonic generation *** demonstrate that these amplification processes can be recycled and therefore have the potential to realize much higher numbers of multiple amplification *** phase amplification method presented here shows considerable advantages over the method based on NOON states and willbe highly promising for use in precision optical measurements.

关键词： process phase harmonic

Physical Layer Security Scheme With AoI-Awareness for Industrial IoT Based on Covert Communications

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IEEE/CAA Journal of Automatica Sinica 2025年第1期12卷 276-278页

作者： Yaping Li zhi-Xin Liu Jia-Wei Su Ya-zhou yuan the Key Laboratory of Industrial Computer Control Engineering of Hebei Province Yanshan University

Dear Editor,Industrial Internet of things(IIoT) is a typical application of cyberphysical system(CPS). In the IIoT, wireless communication is an inevitable trend to replace the deployment-limited wired transmission for cases with large-scale and mobile devices. However, wireless communication gives rise to critical issues related to physical security, such as malicious detections and attacks [1].

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Up-conversion detection of mid-infrared light carrying orbital angular momentum

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Chinese Physics B 2022年第10期31卷 131-136页

作者： Zheng Ge Chen Yang Yin-Hai Li Yan Li Shi-Kai Liu Su-Jian Niu zhi-yuan zhou Bao-Sen Shi CAS Key Laboratory of Quantum Information University of Science and Technology of ChinaHefei 230026China CAS Center for Excellence in Quantum Information and Quantum Physics University of Science and Technology of ChinaHefei 230026China

Frequency up-conversion is an effective method of mid-infrared(MIR) detection by converting long-wavelength photons to the visible domain, where efficient detectors are readily available. Here, we generate MIR light carrying orbital angular momentum(OAM) from a difference frequency generation process and perform up-conversion on it via sum frequency conversion in a bulk quasi-phase-matching crystal. The maximum quantum conversion efficiencies from MIR to visible are 34.0%, 10.4%, and 3.5% for light with topological charges of 0, 1, and 2, respectively, achieved by utilizing an optimized strong pump light. We also verify the OAM conservation with a specially designed interferometer, and the results agree well with the numerical simulations. Our study opens up the possibilities for generating, manipulating, and detecting MIR light that carries OAM, and will have great potential for optical communications and remote sensing in the MIR regime.

关键词： nonlinear optics frequency up-conversion mid-infrared detection

Generation of multiphoton quantum states on silicon

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Light(Science & Applications) 2019年第1期8卷 811-817页

作者： Ming Zhang Lan-Tian Feng zhi-yuan zhou Yang Chen Hao Wu Ming Li Shi-Ming Gao Guo-Ping Guo Guang-Can Guo Dao-Xin Dai Xi-Feng Ren State Key Laboratory for Modern Optical Instrumentation Centre for Optical and Electromagnetic ResearchZhejiang Provincial Key Laboratory for Sensing TechnologiesCollege of Optical Science and EngineeringZhejiang UniversityZijingang CampusHangzhou 310058China Ningbo Research Institute Zhejiang UniversityNingbo 315100China Key Laboratory of Quantum Information CASUniversity of Science and Technology of ChinaHefeiAnhui 230026China Synergetic Innovation Center of Quantum Information&Quantum Physics University of Science and Technology of ChinaHefeiAnhui 230026China

Multiphoton quantum states play a critical role in emerging quantum technologies and greatly improve our fundamental understanding of the quantum *** photonics is well recognized as an attractive technology offering great promise for the generation of photonic quantum states with high-brightness,tunability,stability,and ***,we demonstrate the generation of multiphoton quantum states using a single-silicon nanophotonic *** detected four-photon rate reaches 0.34 Hz even with a low-pump power of 600μ*** multiphoton quantum state is also qualified with multiphoton quantum interference,as well as quantum state *** the generated four-photon states,the quantum interference visibilities are greater than 95%,and the fidelity is 0.78±***,such a multiphoton quantum source is fully compatible with the on-chip processes of quantum manipulation,as well as quantum detection,which is helpful for the realization of large-scale quantum photonic integrated circuits(QPICs)and shows great potential for research in the area of multiphoton quantum science.

关键词： quantum multiphoton realization

Quantum interface for high-dimensional quantum states encoded in an orbital angular momentum space

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Fundamental Research 2021年第1期1卷 88-90页

作者： Bao-Sen Shi zhi-yuan zhou Key Laboratory of Quantum Information CASUniversity of Science and Technology of ChinaHefeiAnhui 230026China CAS Center for Excellence in Quantum Information and Quantum Physics University of Science and Technology of ChinaHefeiAnhui 230026China

Quantum information science involves the study of information pro-cessing tasks that can be accomplished using quantum mechanical *** basic unit of quantum information is a quantum bit(qubit),which exists in a two-dimensional space spanned for example by the or-thogonal polarization states of a *** this case,each photon carries only one ***,if the photon is encoded in a high-dimensional space.

关键词： space. quantum momentum

Effect of graphene addition on activation and kinetic properties of La-Mg-Ni-based hydrogen storage alloys

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Journal of Iron and Steel Research International 2025年第1期32卷 227-238页

作者： Dian-chen Feng Chun-ling Zheng zhi-yuan Zhao Dong-sheng zhou Hui-ping Ren Yang-huan Zhang School of Materials and Metallurgy Inner Mongolia University of Science and TechnologyBaotou014010Inner MongoliaChina Collaborative Innovation Center of Integrated Exploitation of Bayan Obo Multi-Metal Resources Inner Mongolia University of Science and TechnologyBaotou014010Inner MongoliaChina Department of Functional Material Research China Iron and Steel Research Institute GroupBeijing100081China

The La_(1.7)Pr_(0.3)Mg_(16)Ni hydrogen storage alloy was prepared by medium-frequency induction melting,and then the composite hydrogen storage alloy powder of La_(1.7)Pr_(0.3)Mg_(16)Ni+x wt.%(x=0,2,4,and 6)graphene was prepared by ball milling for 10 *** effect of the addition of graphene on the activation and hydrogen de/absorption properties of La_(1.7)Pr_(0.3)Mg_(16)Ni alloy was *** result demonstrated that these composite alloys were composed of La_(2)Mg_(17),La_(2)Ni_(3),and Mg_(2)Ni *** saturated hydrogen absorption,it was composed of LaH_(3),Mg_(2)NiH_(4),and MgH_(2)phases,while during the dehydrogenation process,it was composed of LaH_(3),Mg,and Mg_(2)Ni *** addition of graphene can help get a more homogeneous granule after ball milling and accelerate the first activation of dehydrogenation/hydrogen *** hydrogen release activation energy of the alloys first decreases and then increases as the graphene content increases from x=0 wt.%to x=6 wt.%.The minimum activation energy of the composite hydrogen storage alloy is 51.22 kJ mol^(-1) when x=4 wt.%.

关键词： La-Mg-Ni alloy Graphene Mechanical ball milling Activation property Dynamic performance