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Experimental realization of quantum cryptography communication in free space

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Science China(physics,Mechanics & Astronomy) 2005年第2期48卷 237-246页

作者： wang chuan1, {2. Jingfu1, wang Pingxiao1, DENG Fuguo1, AI Qing1 & long guilu1,2.1. department of physics, Key Laboratory for Quantum Information and Measurements, tsinghua Univer- sity, beijing 100084, China 2. Center for Atomic and Molecular NanoSciences, tsinghua university, beijing 100084, China department of physics Key Laboratory for Quantum Information and Measurements Tsinghua University Beijing 100084 China Atomic and Molecular NanoSciences Tsinghua University Beijing 100084 China

Utilizing linear optical devices, the principle of B92.quantum key distribution (QKD) protocol is demonstrated in free space with a distance of transmission of 2.2.meters. The faint laser pulses with 650 nm wavelength are used as the single photon sources. The experimental results show that the eavesdropping behavior in the signal transmission can be detected. We also discuss the problems and solutions in using the quantum cryptography communication practically. It is pointed out that one of the approaches to increasing the distance of the quantum communication is to overcome the attenuation of the single photon in transmission. This could not be solved by the use of single photon source, and new quantum communication protocols are needed to solve these problems.

关键词： quantum key distribution, free space, linear optics, faint pulses.

Implementation of a multiple round quantum dense coding using nuclear magnetic resonance

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Science China(physics,Mechanics & Astronomy) 2005年第6期48卷 706-715页

作者： zhang Jingfu1, XIE Jingyi2. wang {2., DENG Zhiwei3, LU Zhiheng4, & long guilu1,5 1. Key Laboratory For Quantum Information and Measurements of MOE, department of physics, tsinghua university, beijing 100084,China 2. department of Materials Science and Engineering, beijing Normal university, beijing 100875, China 3. Testing and Analytical Center, beijing Normal university, beijing 100875,China 4. department of physics, beijing Normal university, beijing 100875, China 5. Key Laboratory For atomic and Molecular Nanosciences, tsinghua university, beijing 100084,China 1. Key Laboratory For Quantum Information and Measurements of MOE Department of Physics Tsinghua University 100084 Beijing China 2. department of Materials science and Engineering Beijing Normal University 100875 Beijing China 3. Testing and Analytical Center Beijing Normal University 100875 Beijing China 4. department of physics Beijing Normal University 100875 Beijing China 5. Key Laboratory For Atomic and Molecular Nanosciences Tsinghua University 100084 Beijing China

A multiple round quantum dense coding scheme based on the quantum phase estimation algorithm is proposed and implemented in a three qubit nuclear magnetic resonance (NMR) quantum computer. Using an m + 1 qubit system, Bob can transmit one of 2.+1 messages to Alice, through manipulating only one qubit and exchanging it between Alice and Bob for m rounds. The information capacity is enhanced to m + 1 bits as compared to m bits in a classical scheme. The scheme has been demonstrated in NMR system, and the experimental results show a good agreement between theory and experiment.

关键词： quantum dense coding, multiple round, nuclear magnetic resorance

The Nano Research Young Innovators Awards in bio-inspired nanomaterials

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Nano Research 2024年第2期17卷 417-425页

作者： Jun Chen Shuotao wang department of Bioengineering University of CaliforniaLos AngelesLos AngelesCA 90095USA Key Laboratory of Bio-inspired Materials and Interfacial Science Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China

Nano Research Young Innovators(NR45)Awards are designed to acknowledge and celebrate the achievements of young researchers under 45 years of *** individuals have made significant contributions to the field of nanoscience and *** the inaugural NR45 Awards in 2.18,the journal's editorial board has recognized over a hundred innovators specializing in nanobiotechnology,nano energy,two-dimensional materials,and *** focus of the 2.2. NR45 Awards is on bioinspired nanomaterials,acknowledging thirty-three outstanding young innovators for their extraordinary contributions in developing these materials with applications spanning clean energy,human healthcare,monitoring,and disease treatments,as shown in *** extend our heartfelt congratulations to all the 33 NR45 Awardees in 2.2.!

关键词： journal materials contributions

Efficient entanglement purification for doubly entangled photon state

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Science China(Technological Sciences) 2009年第12期52卷 3464-3467页

作者： wang chuan SHENG YuBo LI XiHan DENG FuGuo {2. Wei long guilu School of Science Beijing University of Posts and TelecommunicationsBeijing 100876China Institute of Low Energy Nuclear Physicsand Department of Material Science and EngineeringBeijing Normal UniversityBeijing 100875China department of Electronic Engineering Tsinghua UniversityBeijing 100084China department of physics Tsinghua UniversityBeijing 100084China tsinghua National Laboratory for Information Science and Technology Tsinghua UniversityBeijing 100084China

In this paper,we present an efficient purification scheme that improves the efficiency of entanglement purification of the recently proposed entanglement purification scheme for doubly entangled photon states (***.A,2.08,77:042.15).This modified scheme contains the bit-flip error correction where all the photon pairs can be kept while all the bit-flip errors are corrected and the entanglement purification of phase-flip errors where a wavelength conversion process is *** scheme has the advantage of high efficiency and a much lower minimum fidelity of the original *** works under existing technology.

关键词： entanglement purification doubly entangled photon state quantum communication

The FAST all sky HI survey(FASHI):The first release of catalog

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Science China(physics,Mechanics & Astronomy) 2024年第1期67卷 112-133页

作者： chuan-Peng zhang Ming Zhu Peng Jiang Cheng Cheng Jing {2. Jie {2. Jin-long Xu Xiao-Lan Liu Nai-Ping Yu Lei Qian Haiyang Yu Mei Ai Yingjie Jing Chen Xu Ziming Liu Xin Guan Chun Sun Qingliang Yang Menglin Huang Qiaoli Hao FAST Collaboration Guizhou Radio Astronomical Observatory Guizhou UniversityGuiyang 550000China National Astronomical Observatories Chinese Academy of Sciences(CAS)Beijing 100101China Chinese Academy of Sciences South America Center for Astronomy National Astronomical ObservatoriesCASBeijing 100101China Kavli Institute for Astronomy and Astrophysics Peking UniversityBeijing 100871China

The FAST All Sky HI survey(FASHI)was designed to cover the entire sky observable by the Five-hundred-meter Aperture Spherical radio Telescope(FAST),spanning approximately 2.000 square degrees of declination between-14°and+66°,and in the frequency range of 1050-1450 MHz,with the expectation of eventually detecting more than 100000 HI *** August 2.2. and June 2.2.,FASHI had covered more than 7600 square degrees,which is approximately 35%of the total sky observable by *** has a median detection sensitivity of around 0.76 m Jy beam-1and a spectral line velocity resolution of~6.4 km s-1at a frequency of~1.4 *** of now,a total of 41741 extragalactic HI sources have been detected in the frequency range 1305.5-1419.5 MHz,corresponding to a redshift limit of z■*** cross-matching FASHI sources with the Siena Galaxy Atlas(SGA)and the Sloan Digital Sky Survey(SDSS)catalogs,we found that 16972.40.7%)sources have spectroscopic redshifts and 10975(2..3%)sources have only photometric *** of the remaining 13794(33.0%)HI sources are located in the direction of the Galactic plane,making their optical counterparts difficult to identify due to high extinction or high contamination of Galactic stellar *** on current survey results,the FASHI survey is an unprecedented blind extragalactic H I *** has higher spectral and spatial resolution and broader coverage than the Arecibo Legacy Fast ALFA Survey(ALFALFA).When completed,FASHI will provide the largest extragalactic HI catalog and an objective view of HI content and large-scale structure in the local universe.

关键词： surveys redshifts galaxies telescope radio lines HI line

Lifetime measurements and test for chirality in 106Ag

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Lifetime measurements and test for chirality in 106Ag

Targeted trace ingredients coupled with chemometric analysis for consistency evaluation of Panax notoginseng saponins injectable formulations

第十三届全国核结构研讨会暨第九次全国“核结构与量子力学”专题讨论会

作者： ZHENG Yun~(1 1)) ZHU Li-Hua~(2,3 2)) WU Xiao-Guang~(1)) He chuang-Ye~(1)) LI Guang-Sheng~(1)) wang Lie-Lin~(1,4)) Yu Bei-Bei~(1)) Yao Shun-He~(1)) {2. Biao~(1,3)) Xu chuan~(5)) wang Jian-Guo~(6)) Gu long~(6)) 1(China Institute of Atomic Energy,beijing 102.13,China) 2(department of physics,Beihang university,beijing 100191,China) 3(Faculty of Science,ShenZhen university,Shenzhen 518060,China) 4(department of physics,Jilin university,Changchun 130023,China) 5(School of physics,Peking university,beijing 100871,China) 6(department of physics,{2.},{2.},China)

The high-spin states in the doubly odd nucleus Ag were populated via the heavy-ion fusionevaporation reaction Mo(B,5n)Ag at beam energy of *** target consisted of a 1.56mg/cm- thick Mo backed on lead with a thickness of 8.03mg/*** have been measured by means of Doppler-shift attenuation method for states in one positive parity magnetic dipole（M1） band and chiral candidate bands in *** B（M1） values for transitions in positive band as a function of rotational frequency w obtained from present experiment are compared with the precious data and TAC calculations in Fig.1. The present experimental results are in good agreement with the calculations and the previous *** comparison suggesting that the total angular momentum can be mainly explained through the shears mechanism. Reduced transition strengths B（E2. in chiral candidate bands obtained from the present experiment are shown in *** experimental B（E2. values are larger in side band than in yrast band as well as the B（M1） *** experimental results do not support the presence of static chirality in Ag.

关键词： High spin states Lifetime measurement Chirality

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中国天然药物:英文版 2023年第8期21卷 631-640页

作者： zhang Jingxian zhang Zijia {2. Zhaojun zhang Tengqian ZHOU Yang CHEN Ming HUANG Zhanwen HE Qingqing long Huali HOU Jinjun WU wanying GUO Dean National Engineering Research Center of TCM Standardization Technology Shanghai Institute of Materia MedicaChinese Academy of SciencesShanghai 201203China NMPA Key Laboratory for Quality Control of Traditional Chinese Medicine Shanghai Institute for Food and Drug ControlShanghai 201203China Guangxi Key Laboratory of Comprehensive Utilization Technology of Pseudo-Ginseng Guangxi Zhongheng Innovative Pharmaceutical Research Co.Ltd.Guangxi 530032China School of Pharmacy University of Chinese Academy of SciencesBeijing 100049China

Evaluating the consistency of herb injectable formulations could improve their product quality and clinical safety,particularly concerning the composition and content levels of trace *** notoginseng Saponins Injection(PNSI),widely used in China for treating acute cardiovascular diseases,contains low-abundance(10%-2.%)and trace saponins in addition to its five main constituents(notoginsenoside R1,ginsenoside Rg1,ginsenoside Re,ginsenoside Rb1,and ginsenoside Rd).This study aimed to establish a robust analytical method and assess the variability in trace saponin levels within PNSI from different vendors and formulation *** achieve this,a liquid chromatography-triple quadrupole mass spectrometry(LC-MS/MS)method employing multiple ions monitoring(MIM)was developed.A“post-column valve switching”strategy was implemented to eliminate highly abundant peaks(NR_(1),Rg_(1),and Re)at 2. min.A total of 51 saponins in PNSI were quantified or relatively quantified using 18 saponin standards,with digoxin as the internal *** study evaluated 119 batches of PNSI from seven vendors,revealing significant variability in trace saponin levels among different vendors and formulation *** findings highlight the importance of consistent content in low-abundance and trace saponins to ensure product control and clinical *** of these ingredients is crucial for maintaining the quality and effectiveness of PNSI in treating acute cardiovascular diseases.

关键词： Consistency evaluation Panax notoginseng saponins PCA analysis Xueshuantong Xuesaitong

Quest for chirality in 107Ag

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Quest for chirality in 107Ag

Effects of selenium source and level on growth performance, antioxidative ability and meat quality of broilers

第十三届全国核结构研讨会暨第九次全国“核结构与量子力学”专题讨论会

作者： HE chuang-Ye~1 zhang Biao~(1,2) ZHU Li-Hua~(3,2) WU Xiao-Guang~1 SUN Hui-Bin~2 ZHENG Yun~1 {2. Lie-Lin~(1,4) YU Bei-Bei~1 YAO Shun-He~1 LI Guang-Sheng~1 XU chuan~5 {2. Jian-Guo~6 GU long~6 zhang Ming~6 1(China Institute of Atomic Energy,beijing 102.13,China) 2(School of Science,Shenzhen university,Shenzhen 518060,China) 3(School of physics and nuclear energy engineering,beijing university of Aeronautics and Astronautics,beijing 100191,China) 4(department of physics,Jilin university,Changchun 130023,China) 5(School of physics and MOE key laboratory of Heavy Ion physics,Peking university,beijing 100087,China) 6(department of physics,{2.},{2.},China)

High-Spin states in nuclei at A～100 mass region have been extensively studied in the recent years. There exists plenty of interesting phenomena in their structure,such as shape co-existence,band termination, magnetic rotations,chiral rotations and so *** them,the chirality attracted much attention both by theoretician and *** the previous study,doublet bands structure was found in *** present work,its neighbouring isotope Ag is selected to quest for the chiral bands.

关键词： high spin states level scheme chirality

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Journal of Integrative Agriculture 2021年第1期20卷 227-235页

作者： wang chuan-{2. XING Guan-zhong wang Li-sai LI Su-fen zhang Li-yang LU Lin LUO Xu-gang LIAO Xiu-dong Mineral Nutrition Research Division Institute of Animal SciencesChinese Academy of Agricultural SciencesBeijing 100193P.R.China Poultry Mineral Nutrition Laboratory College of Animal Science and TechnologyYangzhou UniversityYangzhou 225000P.R.China department of Animal Science Hebei Normal University of Science and TechnologyQinhuangdao 066004P.R.China

This experiment was conducted to investigate the effects of selenium(Se) source and level on growth performance, carcass traits, antioxidative ability and meat quality of broilers. A total of 32. one-d-old Arbor Acres commercial broilers were randomly assigned to 1 of 5 treatments with 8 replicates in a completely randomized design involving a 2.2.factorial arrangement of treatments plus one Se-unsupplemented basal diet control for 42.d. The two Se sources were sodium selenite and Se yeast, and the two supplemental Se levels were 0.2. and 0.40 mg Se kg^–1. The results showed that broilers fed the Se-supplemented diets had higher(P2. to 42.d of age, eviscerated yield and abdominal fat percentages, Se concentrations and glutathione peroxidase(GSH-Px) activities in breast and thigh muscles on d 42. and lower(P1 to 2. and 2. to 42.d of age, mortality from 2. to 42.d of age and malondialdehyde(MDA) concentration in thigh muscle on d 42.than those fed the control diet. Broilers fed the diets supplemented with Se yeast had higher(P1 had lower(P2. mg Se kg^–1. Furthermore, broilers fed the diet supplemented with Se yeast at 0.40 mg Se kg^–1 had higher(P2. mg Se kg^–1, but no differences(P2. and 0.40 mg Se kg^–1. The results from the present study indicated that supplemental Se could increase the growth performance, muscle Se concentration and antio

关键词： selenium source growth performance meat quality antioxidative ability broiler