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Topologically Protected Polarization Quantum Entanglement on a Photonic Chip

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Chip 2022年第1期1卷 14-18页

作者： Yao Wang Yong-Heng Lu Jun Gao Yi-Jun Chang Ruo-Jing Ren zhi-qiang jiao Zhe-Yong Zhang Xian-Min Jin Center for Integrated Quantum Information Technologies(IQIT) School of Physics and Astronomy and State Key Laboratory of Advanced Optical Com-munication Systems and NetworksShanghai Jiao Tong UniversityShanghai 200240China CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics University of Science and Technol-ogy of ChinaHefeiAnhui 230026China

Quantum entanglement,as the strictly non-classical phenomenon,is the kernel of quantum computing and quantum simulation,and has been widely applied ranging from fundamental tests of quantum physics to quantum information ***,the topolog-ical phase is found inherently capable of protecting physical fields from unavoidable fabrication-induced disorder,which inspires the po-tential application of topological protection to quantum ***,we present the experimental demonstration of topologically protected quantum entangled states on a photonic *** process tomogra-phy shows that quantum entanglement can be well preserved by the topological states even when the chip material introduces disorder and relative polarization rotation in phase *** work links the fields of materials,topological science and quantum physics,opening the door to wide applications of topological enhancement in quantum regime.

关键词： Photonic chip Quantum entanglement Topological photonics

Quantum superposition demonstrated higher-order topological bound states in the continuum

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Light(Science & Applications) 2021年第9期10卷 1789-1796页

作者： Yao Wang Bi-Ye Xie Yong-Heng Lu Yi-Jun Chang Hong-Fei Wang Jun Gao zhi-qiang jiao Zhen Feng Xiao-Yun Xu Feng Mei Suotang Jia Ming-Hui Lu Xian-Min Jin Center for Integrated Quantum Information Technologies(IQIT) School of Physics and Astronomy and State Key Laboratory of Advanced Optical Communication Systems and NetworksShanghai Jiao Tong UniversityShanghai200240China National Laboratory of Solid State Microstructures Nanjing UniversityNanjing210093China Department of Materials Science and Engineering Nanjing UniversityNanjing210093China Department of Physics and HKU-UCAS Joint Institute for Theoretical and Computational Physics at Hong Kong The University of Hong KongHong KongChina State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Laser SpectroscopyShanxi UniversityTaiyuanShanxi030006China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuanShanxi030006China Jiangsu Key Laboratory of Artificial Functional Materials Nanjing210093China Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing210093China

Higher-order topological insulators,as newly found non-trivial materials and structures,possess topological phases beyond the conventional bulk-boundary *** previous studies,in-gap boundary states such as the corner states were regarded as conclusive evidence for the emergence of higher-order topological ***,we present an experimental observation of a photonic higher-order topological insulator with corner states embedded into the bulk spectrum,denoted as the higher-order topological bound states in the ***,we propose and experimentally demonstrate a new way to identify topological corner states by exciting them separately from the bulk states with photonic quantum superposition *** results extend the topological bound states in the continuum into higher-order cases,providing an unprecedented mechanism to achieve robust and localized states in a bulk *** importantly,our experiments exhibit the advantage of using the time evolution of quantum superposition states to identify topological corner modes,which may shed light on future exploration between quantum dynamics and higher-order topological photonics.

关键词： spectrum topological superposition

Quantum advantage with membosonsampling

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Chip 2022年第2期1卷 1-6页

作者： Jun Gao Xiao-Wei Wang Wen-Hao Zhou zhi-qiang jiao Ruo-Jing Ren Yu-Xuan Fu Lu-Feng Qiao Xiao-Yun Xu Chao-Ni Zhang Xiao-Ling Pang Hang Li Yao Wang Xian-Min Jin Center for Integrated Quantum Information Technologies(IQIT) School of Physics and Astronomy and State Key Laboratory of Advanced Optical Com-munication Systems and NetworksShanghai Jiao Tong UniversityShanghai 200240China CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics University of Science and Technology of ChinaHefeiAnhui 230026China

Quantum computer,harnessing quantum superposition to boost a parallel computational power,promises to outperform its classical counterparts and offer an exponentially increased *** term“quantum advantage”was proposed to mark the key point when peo-ple can solve a classically intractable problem by artificially control-ling a quantum system in an unprecedented scale,even without er-ror correction or known practical *** sampling,a problem about quantum evolutions of multi-photons on multimode photonic networks,as well as its variants,has been considered as a promising candidate to reach this ***,the current photonic platforms suffer from the scaling problems,both in pho-ton numbers and circuit ***,we propose a new variant of the problem,membosonsampling,exploiting the scaling of the prob-lem can be in principle extended to a large *** experimentally verify the scheme on a self-looped photonic chip inspired by mem-ristor,and obtain multi-photon registrations up to 56-fold in 750,000 modes with a Hilbert space up to *** results exhibit an inte-grated and cost-efficient shortcut stepping into the“quantum advan-tage”regimeina photonic systemfarbeyondpreviousscenarios,and provide a scalable and controllable platform for quantum information processing.

关键词： quantum scaling boson

Topologically protecting squeezed light on a photonic chip

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Photonics Research 2022年第2期10卷 456-464页

作者： Ruo-Jing Ren Yong-Heng Lu Ze-Kun Jiang Jun Gao Wen-Hao Zhou Yao Wang zhi-qiang jiao Xiao-Wei Wang Alexander S.Solntsev Xian-Min Jin Center for Integrated Quantum Information Technologies(IQIT) School of Physics and Astronomy and State Key Laboratory of Advanced Optical Communication Systems and NetworksShanghai Jiao Tong UniversityShanghai 200240China CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics University of Science and Technology of ChinaHefei 230026China School of Mathematical and Physical Sciences University of Technology SydneyUltimoNew South Wales 2007Australia TuringQ Co. Ltd.Shanghai 200240China

Squeezed light is a critical resource in quantum sensing and information processing. Due to the inherently weak optical nonlinearity and limited interaction volume, considerable pump power is typically needed to obtain efficient interactions to generate squeezed light in bulk crystals. Integrated photonics offers an elegant way to increase the nonlinearity by confining light strictly inside the waveguide. For the construction of large-scale quantum systems performing many-photon operations, it is essential to integrate various functional modules on a chip. However, fabrication imperfections and transmission cross talk may add unwanted diffraction and coupling to other photonic elements, reducing the quality of squeezing. Here, by introducing the topological phase, we experimentally demonstrate the topologically protected nonlinear process of four-wave mixing, enabling the generation of squeezed light on a silica chip. We measure the cross-correlations at different evolution distances for various topological sites and verify the nonclassical features with high fidelity. The squeezing parameters are measured to certify the protection of cavity-free, strongly squeezed states. The demonstration of topological protection for squeezed light on a chip brings new opportunities for quantum integrated photonics,opening novel approaches for the design of advanced multi-photon circuits.

关键词： topological squeezed quantum

Underwater transmission of high-dimensional twisted photons over 55 meters

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PhotoniX 2020年第1期1卷 286-296页

作者： Yuan Chen Wei-Guan Shen Zhan-Ming Li Cheng-Qiu Hu Zeng-Quan Yan zhi-qiang jiao Jun Gao Ming-Ming Cao Ke Sun Xian-Min Jin Center for Integrated Quantum Information Technologies(IQIT) School of Physics and Astronomy and State Key Laboratory of Advanced Optical Communication Systems and NetworksShanghai Jiao Tong UniversityShanghai 200240China CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics University of Science and Technology of ChinaHefei 230026AnhuiChina

As an emerging channel resource for modern optics,big data,internet traffic and quantum technologies,twisted photons carrying orbital angular momentum(OAM)have been extended their applicable boundary in different media,such as optical fiber and *** to the extreme condition of loss and pressure,underwater transmission of twisted photons has not been well investigated ***,single-photon tests were all limited at a level of a few meters,and it is in practice unclear what will happen for longer transmission *** we experimentally demonstrate the transmission of single-photon twisted light over an underwater channel up to 55 m,which reach a distance allowing potential real *** different order OAM states and their superposition,a good preservation of modal structure and topological charge are *** results for the first time reveal the real transmission performance of twisted photons in a long-distance regime,representing a step further towards OAM-based underwater quantum communication.

关键词： Orbital angular momentum Single-photon Underwater quantum communication

Reconstruction of quantum channel via convex optimization

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Science Bulletin 2020年第4期65卷 286-292页

作者： Xuan-Lun Huang Jun Gao zhi-qiang jiao Zeng-Quan Yan Zhe-Yong Zhang Dan-Yang Chen Xi Zhang Ling Ji Xian-Min Jin Center for Integrated Quantum Information Technologies(IQIT) School of Physics and Astronomy and State Key Laboratory of Advanced Optical Communication Systems and NetworksShanghai Jiao Tong UniversityShanghai 200240China CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics University of Science and Technology of ChinaHefei 230026China

Quantum process tomography is often used to completely characterize an unknown quantum ***, it may lead to an unphysical process matrix, which will cause the loss of information with respect to the tomography result. Convex optimization, widely used in machine learning, is able to generate a global optimum that best fits the raw data while keeping the process tomography in a legitimate region. Only by correctly revealing the original action of the process can we seek deeper into its properties like its phase transition and its Hamiltonian. Here, we reconstruct the seawater channel using convex optimization and further test it on the seven fundamental gates. We compare our method to the standard-inversion and norm-optimization approaches using the cost function value and our proposed state deviation. The advantages convince that our method enables a more precise and robust estimation of the elements of the process matrix with less demands on preliminary resources. In addition, we examine on a set of non-unitary channels and the reconstructions reach up to 99:5% accuracy. Our method offers a more universal tool for further analyses on the components of the quantum channels and we believe that the crossover between quantum process tomography and convex optimization may help us move forward to machine learning of quantum channels.

关键词： Quantum information Quantum process tomography Convex optimization Quantum channel

Transmission of photonic polarization states through 55-m water: towards air-to-sea quantum communication

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Photonics Research 2019年第8期7卷 800-804页

作者： CHENG-QIU HU ZENG-QUAN YAN JUN GAO zhi-qiang jiao ZHAN-MING LI WEI-GUAN SHEN YUAN CHEN RUO-JING REN LU-FENG QIAO AI-LIN YANG HAO TANG XIAN-MIN JIN School of Physics and Astronomy State Key Laboratory of Advanced Optical Communication Systems and NetworksShanghai Jiao Tong UniversityShanghai200240China Synergetic Innovation Center of Quantum Information and Quantum Physics University of Science and Technology of ChinaHefei230026China

Quantum communication has been rapidly developed due to its unconditional security and successfully implemented through optical fibers and free-space air in experiments. To build a complete quantum communication network involving satellites in space and submersibles in ocean, the underwater quantum channel has been investigated in both theory and experiment. However, the question of whether the polarization encoded qubit can survive through a long-distance and high-loss underwater channel, which is considered as the restricted area for satellite-borne radio waves, still remains. Here, we experimentally demonstrate the transmission of blue-green photonic polarization states through 55-m-long water. We prepare six universal quantum states at the single photon level and observe their faithful transmission in a large marine test platform. We obtain complete information of the channel by quantum process tomography. The distance demonstrated in this work reaches a region allowing potential real applications, representing a step further towards air-to-sea quantum communication.

关键词： QKD Transmission photonic polarization towards air-to-sea quantum communication

Experimental quantum simulation of dynamic localization on curved photonic lattices

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Photonics Research 2022年第6期10卷 1430-1439页

作者： HAO TANG TIAN-YU WANG ZI-YU SHI ZHEN FENG YAO WANG XIAO-WEN SHANG JUN GAO zhi-qiang jiao ZHAN-MING LI YI-JUN CHANG WEN-HAO ZHOU YONG-HENG LU YI-LIN YANG RUO-JING REN LU-FENG QIAO XIAN-MIN JIN Center for Integrated Quantum Information Technologies(IQIT) School of Physics and AstronomyState Key Laboratory of Advanced Optical Communication Systems and NetworksShanghai Jiao Tong UniversityShanghai 200240China Synergetic Innovation Center of Quantum Information and Quantum Physics University of Science and Technology of ChinaHefei 230026China TuringQ Co. Ltd.Shanghai 200240China

Dynamic localization,which originates from the phenomena of particle evolution suppression under an externally applied AC electric field,has been simulated by suppressed light evolution in periodically curved photonic ***,experimental studies on their quantitative dynamic transport properties and application for quantum information processing are *** we fabricate one-dimensional and hexagonal two-dimensional arrays both with sinusoidal *** successfully observe the suppressed single-photon evolution patterns,and for the first time,to the best of our knowledge,measure the variances to study their transport *** onedimensional arrays,the measured variances match both the analytical electric-field calculation and the quantum walk Hamiltonian engineering *** hexagonal arrays as anisotropic effective couplings in four directions are mutually dependent,the analytical approach suffers,whereas quantum walk conveniently incorporates all anisotropic coupling coefficients in the Hamiltonian and solves its exponential as a whole,yielding consistent variances with our experimental ***,we implement a nearly complete localization to show that it can preserve both the initial injection and the wave packet after some evolution,acting as a memory of a flexible time scale in integrated *** demonstrate a useful quantum simulation of dynamic localization for studying their anisotropic transport properties and a promising application of dynamic localization as a building block for quantum information processing in integrated photonics.

关键词： properties quantum curved

Modular assembly of complex C-alkyl glycoside enabled via cooperative NHC and photoredox catalysis

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Science China Chemistry 2025年

作者： Rui-qiang jiao Ming Li Xi Chen Mei-Ze Xu Tian Ding Xiao-Ping Gong Zhuo-Mei Li Xue-Yuan Liu Yong-Min Liang State Key Laboratory of Applied Organic Chemistry Lanzhou University College of Chemistry and Chemical Engineering Northwest Normal University

C-Alkyl glycosides are found in natural products and are indispensable in drug development programs,owing to their diverse range of medicinal ***-component reactions involving glycosyl radical addition are well documented and proved efficient for the C-alkyl glycosides ***,multicomponent reactions for the rapid and controllable construction of structurally diversified C-alkyl glycosides in a single step remains a significant challenge due to the issues associated with balancing reactivity,compatibility,and ***,we report an NHC and photoredox co-catalyzed three-component method to access complex and valuable C-alkyl *** protocol exhibits broad substrate scope and excellent chemoand ***,nine types of sugars are compatible with this *** addition,the generality of this catalytic strategy was further highlighted by the potential for scalable production,the feasibility of further modifications of the products and its successful application in the late-stage functionalization of pharmaceutical skeletons.

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