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Recent advances for quantum classifiers

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Science China(Physics,Mechanics & Astronomy) 2022年第2期65卷 1-23页

作者： Weikang Li dong-ling deng Center for Quantum Information Institute for Interdisciplinary Information ScienceTsinghua UniversityBeijing 100084China Shanghai Qi Zhi Institute Shanghai 200232China

Machine learning has achieved dramatic success in a broad spectrum of *** interplay with quantum physics may lead to unprecedented perspectives for both fundamental research and commercial applications,giving rise to an emergent research frontier of quantum machine *** this line,quantum classifiers,which are quantum devices that aim to solve classification problems in machine learning,have attracted tremendous attention *** this review,we give a relatively comprehensive overview for the studies of quantum classifiers,with a focus on recent ***,we will review a number of quantum classification algorithms,including quantum support vector machines,quantum kernel methods,quantum decision tree classifiers,quantum nearest neighbor algorithms,and quantum annealing based ***,we move on to introduce the variational quantum classifiers,which are essentially variational quantum circuits for *** will review different architectures for constructing variational quantum classifiers and introduce the barren plateau problem,where the training of quantum classifiers might be hindered by the exponentially vanishing *** addition,the vulnerability aspect of quantum classifiers in the setting of adversarial learning and the recent experimental progress on different quantum classifiers will also be discussed.

关键词： quantum machine learning quantum classifiers quantum kernel methods variational quantum algorithms

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Quantum federated learning through blind quantum computing

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Science China(Physics,Mechanics & Astronomy) 2021年第10期64卷 64-71页

作者： Weikang Li Sirui Lu dong-ling deng Center for Quantum Information Institute for Interdisciplinary Information ScienceTsinghua UniversityBeijing 100084China Max-Planck-Institut fiir Quantenoptik Garching D-85748Germany Shanghai Qi Zhi Institute Shanghai 200232China

Private distributed learning studies the problem of how multiple distributed entities collaboratively train a shared deep network with their private data unrevealed. With the security provided by the protocols of blind quantum computation, the cooperation between quantum physics and machine learning may lead to unparalleled prospect for solving private distributed learning *** this paper, we introduce a quantum protocol for distributed learning that is able to utilize the computational power of the remote quantum servers while keeping the private data safe. For concreteness, we first introduce a protocol for private single-party delegated training of variational quantum classifiers based on blind quantum computing and then extend this protocol to multiparty private distributed learning incorporated with diferential privacy. We carry out extensive numerical simulations with diferent real-life datasets and encoding strategies to benchmark the efectiveness of our protocol. We find that our protocol is robust to experimental imperfections and is secure under the gradient attack after the incorporation of diferential privacy. Our results show the potential for handling computationally expensive distributed learning tasks with privacy guarantees, thus providing a valuable guide for exploring quantum advantages from the security perspective in the field of machine learning with real-life applications.

关键词： quantum federated learning blind quantum computing diferential privacy quantum classifier

Quantum Continual Learning Overcoming Catastrophic Forgetting

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Chinese Physics Letters 2022年第5期39卷 16-22页

作者： Wenjie Jiang Zhide Lu dong-ling deng Center for Quantum Information IIISTsinghua UniversityBeijing 100084China Shanghai Qi Zhi Institute Shanghai 200232China

Catastrophic forgetting describes the fact that machine learning models will likely forget the knowledge of previously learned tasks after the learning process of a new *** is a vital problem in the continual learning scenario and recently has attracted tremendous concern across different *** explore the catastrophic forgetting phenomena in the context of quantum machine *** is found that,similar to those classical learning models based on neural networks,quantum learning systems likewise suffer from such forgetting problem in classification tasks emerging from various application *** show that based on the local geometrical information in the loss function landscape of the trained model,a uniform strategy can be adapted to overcome the forgetting problem in the incremental learning *** results uncover the catastrophic forgetting phenomena in quantum machine learning and offer a practical method to overcome this problem,which opens a new avenue for exploring potential quantum advantages towards continual learning.

关键词： overcome getting likely

Quantum enhanced convolutional neural networks for NISQ computers

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Science China(Physics,Mechanics & Astronomy) 2021年第10期64卷 123-123页

作者： dong-ling deng Center for Quantum Information Institute for Interdisciplinary Information ScienceTsinghua UniversityBeijing 100084China Shanghai Qi Zhi Institute Shanghai 200232China

The interplay between quantum physics and machine learning may lead to unprecedented perspectives for both fields [1]. On the one hand, ideas and techniques from machine learning, or more broadly artificial intelligen... 详细信息

关键词： domain. quantum convolution

Probe Knots and Hopf Insulators with Ultracold Atoms

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Chinese Physics Letters 2018年第1期35卷 36-40页

作者： dong-ling deng Sheng-Tao Wang Kai Sun L.-M.Duan Department of Physics University of MichiganAnn ArborMichigan 48109USA Condensed Matter Theory Center and Joint Quantum Institute Department of PhysicsUniversity of MarylandCollege ParkMD 20742-4111USA Center for Quantum Information IIISTsinghua UniversityBeijing 100084 Department of Physics Harvard UniversityCambridgeMassachusetts 02138USA

Knots and links are fascinating and intricate topological *** influence spans from DNA and molecular chemistry to vortices in superfluid helium,defects in liquid crystals and cosmic strings in the early *** we find that knotted structures also exist in a peculiar class of three-dimensional topological insulators—the Hopf *** particular,we demonstrate that the momentum-space spin textures of Hopf insulators are twisted in a nontrivial way,which implies the presence of various knot and link *** further illustrate that the knots and nontrivial spin textures can be probed via standard time-of-flight images in cold atoms as preimage contours of spin orientations in stereographic *** extracted Hopf invariants,knots,and links are validated to be robust to typical experimental *** work establishes the existence of knotted structures in Hopf insulators,which may have potential applications in spintronics and quantum information processing.

关键词： Superfluid helium

Unsupervised learning of interacting topological phases from experimental observables

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Fundamental Research 2024年第5期4卷 1086-1091页

作者： Li-Wei Yu Shun-Yao Zhang Pei-Xin Shen dong-ling deng Theoretical Physics Division Chern Institute of Mathematics and LPMCNankai UniversityTianjin 300071China Center for Quantum Information IIISTsinghua UniversityBeijing 100084China Shanghai Qi Zhi Institute 41th FloorAI TowerNo.701 Yunjin RoadXuhui DistrictShanghai 200232China

Classifying topological phases of matter with strong interactions is a notoriously challenging task and has attracted considerable attention in recent *** this paper,we propose an unsupervised machine learning approach that can classify a wide range of symmetry-protected interacting topological phases directly from the experimental observables and without a priori *** analytically show that Green’s functions,which can be derived from spectral functions that can be measured directly in an experiment,are suitable for serving as the input data for our learning proposal based on the diffusion *** a concrete example,we consider a one-dimensional interacting topological insulators model and show that,through extensive numerical simulations,our diffusion map approach works as *** addition,we put forward a generic scheme to measure the spectral functions in ultracold atomic systems through momentum-resolved Raman *** work circumvents the costly diagonalization of the system Hamiltonian,and provides a versatile protocol for the straightforward and autonomous identification of interacting topological phases from experimental observables in an unsupervised manner.

关键词： Unsupervised learning Topological phases Diffusion map Spectral function Ultracold atom

Supplemental Material: Probe knots and Hopf insulators with ultracold atoms

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Chinese Physics Letters 2018年第1期 46-48页

作者： dong-ling deng Sheng-Tao Wang Kai Sun L.-M.Duan Department of Physics University of Michigan Condensed Matter Theory Center and Joint Quantum Institute Department of Physics University of Maryland Center for Quantum Information IIIS Tsinghua University Department of Physics Harvard University

*** COORDINATES AND A SKETCH OF THE KNOTTED SPIN TEXTURE For Hopf insulators in a cubic lattice,the first Brillouin zone（BZ）is a 3D torus T;.Since it is not convenient to draw and visualize different knots and links... 详细信息

关键词： Probe knots and Hopf insulators with ultracold atoms Supplemental Material

Digital Simulation of Projective Non-Abelian Anyons with 68 Superconducting Qubits

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Chinese Physics Letters 2023年第6期40卷 1-7页

作者： Shibo Xu Zheng-Zhi Sun Ke Wang Liang Xiang Zehang Bao Zitian Zhu Fanhao Shen Zixuan Song Pengfei Zhang Wenhui Ren Xu Zhang Hang dong Jinfeng deng Jiachen Chen Yaozu Wu Ziqi Tan Yu Gao Feitong Jin Xuhao Zhu Chuanyu Zhang Ning Wang Yiren Zou Jiarun Zhong Aosai Zhang Weikang Li Wenjie Jiang Li-Wei Yu Yunyan Yao Zhen Wang Hekang Li Qiujiang Guo Chao Song H.Wang dong-ling deng School of Physics ZJU-Hangzhou Global Scientific and Technological Innovation CenterInterdisciplinary Center for Quantum Informationand Zhejiang Province Key Laboratory of Quantum Technology and DeviceZhejiang UniversityHangzhou 310027China Center for Quantum Information IIISTsinghua UniversityBeijing 100084China Theoretical Physics Division Chern Institute of Mathematics and LPMCNankai UniversityTianjin 300071China Hefei National Laboratory Hefei 230088China Shanghai Qi Zhi Institute Shanghai 200232China

Non-Abelian anyons are exotic quasiparticle excitations hosted by certain topological phases of *** break the fermion-boson dichotomy and obey non-Abelian braiding statistics:their interchanges yield unitary operations,rather than merely a phase factor,in a space spanned by topologically degenerate *** are the building blocks of topological quantum ***,experimental observation of non-Abelian anyons and their characterizing braiding statistics is notoriously challenging and has remained elusive hitherto,in spite of various theoretical ***,we report an experimental quantum digital simulation of projective non-Abelian anyons and their braiding statistics with up to 68 programmable superconducting qubits arranged on a two-dimensional *** implementing the ground states of the toric-code model with twists through quantum circuits,we demonstrate that twists exchange electric and magnetic charges and behave as a particular type of non-Abelian anyons,i.e.,the Ising *** particular,we show experimentally that these twists follow the fusion rules and non-Abelian braiding statistics of the Ising type,and can be explored to encode topological logical ***,we demonstrate how to implement both single-and two-qubit logic gates through applying a sequence of elementary Pauli gates on the underlying physical *** results demonstrate a versatile quantum digital approach for simulating non-Abelian anyons,offering a new lens into the study of such peculiar quasiparticles.

关键词： topological Abelian quantum

Correlations of the expression of Cx43,SCFFBXW7,p-cyclin E1(Ser73),p-cyclin E1(Thr77)and p-cyclin E1(Thr395)in colon cancer tissues

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World Journal of Gastrointestinal Oncology 2025年第1期17卷 207-213页

作者： Rong-Gang Luan Ming-Da Liu Zi-Feng deng Cong-Lan Lu Mei-ling Yu Ming-Yu Zhang Rong Liu Ran An You-Liang Yao dong-Bei Guo Yong-Xing Zhang Lei Zhao Department of Gastrointestinal Surgery Air Force Hospital of Eastern TheaterAnhui Medical UniversityNanjing 230032Jiangsu ProvinceChina State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics School of Public HealthXiamen UniversityXiamen 361102Fujian ProvinceChina Trauma Surgery Air Force Hospital of Eastern TheaterAnhui Medical UniversityNanjing 230032Jiangsu ProvinceChina Department of Orthopaedics Air Force Hospital of Eastern TheaterAnhui Medical UniversityNanjing 230032Jiangsu ProvinceChina

BACKGROUND Previous cellular studies have demonstrated that elevated expression of Cx43 promotes the degradation of cyclin E1 and inhibits cell proliferation through ***,reduced expression results in a loss of this capacity to facilitate cyclin E *** ubiquitination and degradation of cyclin E1 may be associated with phosphorylation at specific sites on the protein,with Cx43 potentially enhancing this process by facilitating the phosphorylation of these critical *** To investigate the correlation between expression of Cx43,SKP1/Cullin1/F-box(SCF)FBXW7,p-cyclin E1(ser73,thr77,thr395)and clinicopathological indexes in colon *** Expression levels of Cx43,SCFFBXW7,p-cyclin E1(ser73,thr77,thr395)in 38 clinical colon cancer samples were detected by immunohistochemistry and were analyzed by statistical methods to discuss their *** Positive rate of Cx43,SCFFBXW7,p-cyclin E1(Ser73),p-cyclin E1(Thr77)and p-cyclin E1(Thr395)in detected samples were 76.32%,76.32%,65.79%,5.26%and 55.26%*** expressions of these proteins were not related to the tissue type,degree of tissue differentiation or lymph node ***43 and SCFFBXW7(r=0.749),p-cyclin E1(Ser73)(r=0.667)and p-cyclin E1(Thr395)(r=0.457),SCFFBXW7 and p-cyclin E1(Ser73)(r=0.703)and p-cyclin E1(Thr395)(0.415)were correlated in colon cancer(P<0.05),and expressions of the above proteins were positively correlated in colon *** Cx43 may facilitate the phosphorylation of cyclin E1 at the Ser73 and Thr195 sites through its interaction with SCFFBXW7,thereby influencing the ubiquitination and degradation of cyclin E1.

关键词： Colon cancer Cx43 SCFFBXW7 Phosphorylation of cyclin E1 Sites of cyclin E1 Correlation analysis