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Realization of Quantum Secure Direct Communication with Continuous Variable

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Research 2024年第2期6卷 159-170页

作者： Zhengwen Cao Yuan Lu Geng Chai Hao Yu Kexin Liang Lei Wang School of Information Science and Technology Northwest UniversityXi'an710127China

With the progress of theoretical and applied technologies,the communication system based on the classical encryption is seriously threatened by quantum computing and distributed computing.A communication method that directly loads confidential information on the quantum state,quantum secure direct communication(QSDC),came into being for resisting security ***,we report the first continuous-variable QSDC(CV-QSDC)experimental demonstration for verifying the feasibility and effectiveness of the CV-QSDC protocol based on Gaussian mapping and propose a parameter estimation for signal classification under the actual *** our experiment,we provided 4×10^(2) blocks,where each block contains 105 data for direct information *** the transmission distance of 5 km in our experiment,the excess noise is 0.0035 SNU,where SNU represents the unit of shot-noise *** 4.08×10^(5) bit per second experimental results firmly demonstrated the feasibility of CV-QSDC under the fiber *** proposed grading judgment method based on parameter estimation provides a practical and available message processing scheme for CV-QSDC in a practical fiber channel and lays the groundwork for the grading reconciliation.

关键词： quantum estimation verify

Automatic Compensation of Total Phase Aberrations in Digital Holographic Biological Imaging

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Chinese Physics Letters 2011年第11期28卷 131-134页

作者： ZHANG Yi-Zhuo WANG Da-Yong WANG Yun-Xin TAO Shi-Quan College of Applied Sciences Beijing University of TechnologyBeijing 100124 Institute of Information Photonics Technology Beijing University of TechnologyBeijing 100124

Digital holographic microscopy has been a powerful metrological technique for phase-contrast *** inherent phase aberrations always exist and degrade the quality of the phase-contrast images.A surface fitting method based on an improved mathematic model is proposed,which can be used to remove the phase aberrations without any pre-knowledge of the setup or manual *** improved mathematic model includes not only the usual terms but also the cross terms and the high order terms to describe the phase aberrations with high ***,a non-iterative algorithm is used to solve the parametersand thus less computational load is *** proposed method is applied to the live imaging of *** experimental results verify its validity.

关键词： remove holographic verify

Towards High-Dimensional Entanglement in Path:Photon-Source Produced from a Two-Dimensional Atomic Cloud

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Chinese Physics Letters 2021年第8期38卷 38-42页

作者： Shaoxing Liu Xuanying Lai Ce Yang J.F.Chen State Key Laboratory of Precision Spectroscopy School of Physics and Electronic ScienceEast China Normal UniversityShanghai 200241China Shenzhen Institute for Quantum Science and Engineering and Department of Physics Southern University of Science and TechnologyShenzhen 518055China

A photon source with high-dimensional entanglement is able to bring increasing capacity of information in quantum *** dimensionality is determined by the chosen degree of freedom of the photons and is limited by the complexity of the physical *** we propose a new type of high-dimensional entangled photon source,generated via path-indistinguishable scheme from a two-dimensional atomic cloud,which is prepared in a magneto-optical *** verify the photon source,we demonstrate experimentally the quantum state of the single photons heralded by its partner photon,with homodyne tomographic technology.

关键词： quantum verify dimensionality

Adaptive Synchronization and Anti-Synchronization of a Chaotic Lorenz–Stenflo System with Fully Unknown Parameters

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Chinese Physics Letters 2013年第7期30卷 26-29页

作者： M.Mossa Al-sawalha Mathematics Department Faculty of ScienceUniversity of HailKingdom of Saudi Arabia

An adaptive control scheme is developed to study the synchronization and the anti-synchronization behaviors between two identical Lorenz–Stenflo systems with unknown *** adaptive controller is designed based on Lyapunov stability theory and an analytic expression of the controller with its adaptive laws of parameters is *** analysis and numerical simulations are shown to verify the results.

关键词： parameters. verify identical

P_(c)(4457)Interpreted as a J^(P)=1/2+State by D^(0)∧_(c)^(+)(2595)-π^(0)P_(c)(4312) Interaction

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Chinese Physics Letters 2024年第9期41卷 23-27页

作者： Jin-Zi Wu Jin-Yi Pang Jia-Jun Wu School of Physics Sciences University of Chinese Academy of SciencesBeijing 100049China Columbian College of Arts&Sciences George Washington University80122nd St.NW Washington DC 20052USA College of Science University of Shanghai for Science and TechnologyShanghai 200093China Southern Center for Nuclear-Science Theory Institute of Modern PhysicsChinese Academy of SciencesHuizhou 516000China

P_(c)(4457)has been discovered over five years,but the parity of this particle remains *** propose a new interpretation for P_(c)(4457),which is the state generated from the coupled-channel D^(0)Ac+(2595)andπ^(0)P_(c)(4312)since they can exchange an almost on-shell∑_(c)^(+).In this scenario,the parity of P_(c)(4457)will be positive,which is different from the candidate of the bound state of D*∑_(c).The main decay channel of P_(c)(4457)in this model is Pc(4312)π.We propose three processes∧_(b)^(0)→J/ψKapπ^(-),∧_(b)^(0)→J/ψK-pπ^(0),and∧_(b)^(0)→J/ψpπ^(-)π^(+)k^(-)to verify Pc(4457)→Pc(4312)π.

关键词： parity verify

Correlation of Exciton and Biexciton from a Single InAs Quantum Dot

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Chinese Physics Letters 2012年第9期29卷 57-59页

作者： LI Yu-Long CHEN Geng TANG Jian-Shun LI Chuan-Feng Key Laboratory of Quantum Information University of Science and Technology of ChinaHefei 230026

The peaks of exciton and biexciton from the single quantum dot(QD)micro-photoluminescence spectra are identified by observing the intensity of those peaks in relation to increasing excitation *** order to further verify the properties of the exciton and biexciton,we perform auto-and cross correlation *** the former,we confirm the antibunching property of the signal light emitted from the single *** cross correlation measurement,we verify that the exciton and biexciton emissions originate from the same QD and they are strongly correlated with each ***,we analyze the behavior of the cross correlation function in both the cases of saturated and unsaturated excitation of the QD.

关键词： verify excitation saturated

Simultaneous Synchronization and Anti-Synchronization of Two Identical New 4D Chaotic Systems

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Chinese Physics Letters 2011年第4期28卷 15-18页

作者： GUO Rong-Wei School of Mathematics and Physics Shandong Polytechnic UniversityJinan 250353

We investigate the synchronization and anti-synchronization of the new 4D chaotic system and propose a same adaptive controller in the form which not only synchronizes,but also anti-synchronizes two identical new 4D c... 详细信息

关键词： chaotic verify identical

Simulation and Suppression of the Gas Phase Pre-reaction in Metal-Organic Chemical Vapor Deposition of ZnO

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Chinese Physics Letters 2011年第11期28卷 198-201页

作者： ZHU Guang-Yao GU Shu-Lin ZHU Shun-Ming TANG Kun YE Jian-Dong ZHANG Rong SHI Yi ZHENG You-Dou Nanjing National Laboratory of Microstructures and School of Electronic Science and Engineering Nanjing UniversityNanjing 210093

The reaction mechanism and simulations of the metal-organic chemical vapor deposition reactor for ZnO film growth are presented,indicating the temperature of the reaction *** gas phase pre-reaction can be modulated by several factors or *** verify the relationships between temperature and pyrolysis of precursors,and further reveal that the substrate temperature and flow rate of cooling water have great impacts on the temperature *** experimental results agree with the simulations.

关键词： conditions pyrolysis verify

Quantum verification of NP problems with single photons and linear optics

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Light(Science & Applications) 2021年第9期10卷 1750-1760页

作者： Aonan Zhang Hao Zhan Junjie Liao Kaimin Zheng Tao Jiang Minghao Mi Penghui Yao Lijian Zhang National Laboratory of Solid State Microstructures Key Laboratory of Intelligent Optical Sensing and Manipulation(Ministry of Education)and College of Engineering and Applied SciencesNanjing University210093NanjingChina Collaborative Innovation Center of Advanced Microstructures Nanjing University210093NanjingChina State Key Laboratory for Novel Software Technology Nanjing University210093NanjingChina

Quantum computing is seeking to realize hardware-optimized algorithms for application-related computational ***(nondeterministic-polynomial-time)is a complexity class containing many important but intractable problems like the satisfiability of potentially conflict constraints(SAT).According to the well-founded exponential time hypothesis,verifying an SAT instance of size n requires generally the complete solution in an O(n)-bit *** contrast,quantum verification algorithms,which encode the solution into quantum bits rather than classical bit strings,can perform the verification task with quadratically reduced information about the solution in O~(Õ−−√n)*** we realize the quantum verification machine of SAT with single photons and linear *** using tunable optical setups,we efficiently verify satisfiable and unsatisfiable SAT instances and achieve a clear completeness-soundness gap even in the presence of experimental *** protocol requires only unentangled photons,linear operations on multiple modes and at most two-photon joint *** features make the protocol suitable for photonic realization and scalable to large problem sizes with the advances in high-dimensional quantum information manipulation and large scale linear-optical *** results open an essentially new route toward quantum advantages and extend the computational capability of optical quantum computing.

关键词： quantum optics verify