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Self-error-rejecting multipartite entanglement purification for electron systems assisted by quantum-dot spins in optical microcavities

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Chinese Physics B 2022年第5期31卷 113-121页

作者： Yong-Ting Liu Yi-Ming Wu fang-fang du Science and Technology on Electronic Test and Measurement Laboratory North University of ChinaTaiyuan 030051China

We present a self-error-rejecting multipartite entanglement purification protocol(MEPP)for N-electron-spin entangled states,resorting to the single-side cavity-spin-coupling *** MEPP has a high efficiency containing two *** is to obtain high-fidelity N-electron-spin entangled systems with error-heralded parity-check devices(PCDs)in the same parity-mode outcome of three electron-spin pairs,as well as M-electron-spin entangled subsystems(2≤Mdue to the practical photon-scattering deviations from the finite side leakage of the microcavity,and the limited coupling between a quantum dot and a cavity mode,converted into a failed detection in a heralded way.

关键词： quantum communication entanglement purification electron-spin system

Adenovirus-mediated NDRG2 inhibits the proliferation of human renal cell carcinoma cell line OS-RC-2 in vitro

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Asian Pacific Journal of Tropical Medicine 2014年第11期7卷 873-878页

作者： Sheng Qiang Zhen-fang du Min Huang Zhangjiagang Hospital of Traditional Chinese Medicine

Objective:To investigate the inhibitory effects of adenovirus-mediated NDRG2 on the proliferation of human renal cell carcinoma cell line OS-RC-2 in ***:NDRG2 was harvested by RT-PCR,confirmed by DNA sequencing,and then cloned into the eukaryotic expression vector pIRES2-EGFP,which encodes green fluorescent protein(GFP),to construct p1RES2-EGFP-NDRG2 ***-RC-2 cells with NDRG2 negative expression were transfected with p1RES2-EGFP-NDRG2 *** growth of transfected OS-RC-2 cells was observed under light and fluorescence *** colony-forming cell assays,cell proliferation detection and MTT assays,the growth curves of cells in each group were plotted to investigate the inhibitory effects of adenovirus-mediated NDRG2 on the proliferation of OS-RC-2 *** cycle was determined by flow *** laser scanning microscopy showed that NDRG2 protein was specifically located on subcellular ***:A eukaryotic expression vector p1RES2-EGFP-NDRG2 was successfully *** NDRG2 transfection,the growth of OS-RC-2 cells was *** cytometry showed that cells were arrested in S phase but the peak of cell apoptosis was not present,and confocal laser scanning microscopy showed that NDRG2 protein was located in ***:NDRG2 can significantly inhibit the proliferation of OS-RC-2 cells in vitro and its protein is specifically expressed in the mitochondrion.

关键词： NDRC2 OS-RC-2 Adenovirus Proliferation:Inhibition

1D Ferromagnetic Interaction of 2-Iodo Nitronyl Nitroxide Radical Confirmed by Spin Density Calculation

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Chemical Research in Chinese Universities 2012年第6期28卷 1066-1069页

作者： LIU Zhi-liang SONG Ye du Chun-fang College of Chemistry and Chemical Engineering Inner Mongolia University Hohhot 010021 P. R. China

A supramolecular 1D ferromagnetic system was studied experimentally as well as *** density functional theory（DFT） calculations were based on the X-ray *** results of DFT calculations and McConnell mechanism have contributed to the understanding of the factors governing the exchange coupling of magnetism in the crystal *** the experimental evidence and theoretical calculation indicate that spin density in 2-iodo nitronyl nitroxide（INN） radicals confirms 1D ferromagnetic chain with inter-chain antiferromagnetic interaction.

关键词： Supramolecular chemistry Density functional theory calculation Spin density Ferromagnetic chain

Deterministic and complete hyperentangled Bell states analysis assisted by frequency and time interval degrees of freedom

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Frontiers of physics 2022年第5期17卷 149-157页

作者： Xin-Jie Zhou Wen-Qiang Liu Hai-Rui Wei Yan-Bei Zheng fang-fang du School of Mathematics and Physics University of Science and Technology BeijingBeijing 100083China Center for Quantum Technology Research and Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurements(MOE) School of PhysicsBeijing Institute of TechnologyBeijing 100081China Science and Technology on Electronic Test and Measurement Laboratory North University of ChinaTaiyuan 030051China

Hyperentangled Bell states analysis(HBSA)is an essential building block for certain hyper-parallel quantum information *** propose a complete and deterministic HBSA scheme encoded in spatial and polarization degrees of freedom(DOFs)of two-photon system assisted by a fixed frequency-based entanglement and a time interval *** parity information the spatial-based and polarization-based hyper-entanglement can be distinguished by the distinct time intervals of the photon pairs,and the phase information can be distinguished by the detection *** with previous schemes,the number of the auxiliary entanglements is reduced from two to one by introducing time interval ***,the additional frequency and time interval DOFs suffer less from the collective channel noise.

关键词： hyperentangled Bell states analysis multiple degrees of freedom time interval

Tectonic dynamics and correlation of major earthquake sequences of the Xiaojiang and Qujiang-Shiping fault systems, Yunnan, China

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Science China Earth Sciences 2011年第10期54卷 1563-1575页

作者： WEN XueZe du fang LONG Feng FAN Jun ZHU Hang Institute of Earthquake Science China Earthquake Administration Beijing 100036 China Earthquake Administration of Sichuan Province Chengdu 610041 China

The N-S trending Xiaojiang fault zone and the NW-SE trending Qujiang-Shiping fault zone are adjacent active fault systems and seismogenic zones associated with strong and major earthquakes in Yunnan, China. To understand the interaction of the two fault systems, and its probable influence on earthquake occurrences, this paper conducts a synthetic study based on data of active tectonics, historical earthquakes, relocated small earthquakes, GPS station velocities and focal mechanism resolutions. The study makes several conclusions. （1） The active southward motion of the western side of the Xiaojiang fault zone （i.e. the side of the Sichuan-Yunnan block） has a persistent and intensive effect on the Qujiang-Shiping fault zone. The later fault zone has absorbed and transformed the southward motion of the western side of the former fault zone through dextral strike-slip/sheafing as well as transverse shortening/thrusting. （2） Along the Xiaojiang fault zone, the present sinistral strike-slip/sheafing rate decreases from 10 and 8 mm/a on the northern, central and central-southern segments to 4 mm/a on the southern segment. The decreased rate has been adjusted in the area along and surrounding the Qujiang-Shiping fault zone through reverse-dextral faulting and distributed sheafing and shortening. （3） The tectonic-dynamic relation between the Xiaojiang fault zone and the Qujiang-Shiping fault zone is also manifested by a close correlation of earthquake occurrences on the two fault zones. From 1500 to 1850 a sequence of strong and major earthquakes occurred along the Xiaojiang fault zone and its northern neighbor, the Zemuhe fault zone, which was characterized by gradually accelerating strain release, gradually shortening intervals between M≥7 events, and major releases occurring in the mid to later stages of the sequence. As a response to this sequence, after an 88-year delay, another sequence of 383 years （from 1588 to 1970） of strong and major earthquakes occurred on the Qu

关键词： active fault systems fault interaction fault motion transformation tectonic dynamics correlation of earthquake sequences

High-Capacity Quantum Secure Direct Communication Based on Quantum Hyperdense Coding with Hyperentanglement

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Chinese Physics Letters 2011年第4期28卷 32-35页

作者： WANG Tie-Jun LI Tao du fang-fang DENG Fu-Guo Department of Physics Applied Optics Beijing Area Major LaboratoryBeijing Normal UniversityBeijing 100875 College of Nuclear Science and Technology Beijing Normal UniversityBeijing 100875 Beijing Radiation Center Beijing 100875

We present a quantum hyperdense coding protocol with hyperentanglement in polarization and spatial-mode degrees of freedom of photons first and then give the details for a quantum secure direct communication(QSDC)protocol based on this quantum hyperdense coding *** QSDC protocol has the advantage of having a higher capacity than the quantum communication protocols with a qubit *** with the QSDC protocol based on superdense coding with𝑑-dimensional systems,this QSDC protocol is more feasible as the preparation of a high-dimension quantum system is more difficult than that of a two-level quantum system at present.

关键词： quantum system details

Hyperentanglement-assisted hyperdistillation for hyper-encoding photon system

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Frontiers of physics 2022年第3期17卷 121-131页

作者： Peng Wang Chang-Qi Yu Zi-Xu Wang Rui-Yang Yuan fang-fang du Bao-Cang Ren Department of Physics Capital Normal UniversityBeijing 100048China Science and Technology on Electronic Test and Measurement Laboratory North University of ChinaTaiyuan 030051China

In quantum information processing, the quality of photon system is decreased by the inevitable interaction with environment, which will greatly reduce the efficiency and security of quantum information processing. In this paper, we propose hyperentanglement-assisted hyperdistillation schemes to guarantee the quality of hyper-encoding photon system based on the method of quantum hyper-teleportation, which can increase the success probability of hyperdistillation and reduce the resource consumption. First, we propose a hyperentanglement-assisted single-photon hyperdistillation (HASPHD) scheme for polarization and spatial qubits to get rid of the vacuum state component caused by transmission loss, whose success probability can achieve the optimal one by increasing the efficiency of quantum hyper-teleportation. Subsequently, we present two hyperentanglement-assisted hyperentanglement distillation (HAHED) schemes for photon system to protect hyperentanglement from both transmission loss and quantum channel noise, which can recover the less-entangled mixed state to maximally hyperentangled state for known-parameter and unknown-parameter cases with high success probability and low resource consumption. In these hyperdistillation schemes, the influence of imperfect effects of optical elements can be largely decreased by the quantum hyper-teleportation method. These characters make the hyperentanglement-assisted hyperdistillation schemes have potential application prospects in practical quantum information processing.

关键词： hyperdistillation transmission loss quantum channel noise quantum communication quantum information

Changes of Photosystem Ⅱ Electron Transport in the ChlorophyⅡ-deficient Oilseed Rape Mutant Studied by ChlorophyⅡ Fluorescence and Thermoluminescence

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Journal of Integrative Plant Biology 2007年第5期49卷 698-705页

作者： Jun-Wei Guo Jin-Kui Guo Yun Zhao Lin-fang du College of Life Sciences Sichuan University Chengdu 610064 China Institute of Botany the Chinese Academy of Sciences Beijing 100093 China

The photosystem Ⅱ （PSII） complex of photosynthetic membranes comprises a number of chlorophyll-binding proteins that are important to the electron flow. Here we report that the chlorophyll b-deficient mutant has decreased the amount of light-harvesting complexes with an increased amount of some core polypeptldes of PSII, including CP43 and CP47. By means of chlorophyll fluorescence and thermolumlnescence, we found that the ratio of Fv/Fm, qP and electron transport rate in the chlorophyll b-deficient mutant was higher compared to the wild type. In the chlorophyll lPdeflclent mutant, the decay of the primary electron acceptor quinones （QA-） reoxidation was decreased, measured by the fluorescence. Furthermore, the thermoluminescence studies in the chlorophyll bdeficient mutant showed that the B band （S2/S3QB-） decreased slightly and shifted up towards higher temperatures. In the presence of dlchlorophenyl-dlmethylurea, which is inhibited in the electron flow to the second electron acceptor quinines （QB） at the PSll acceptor side, the maximum of the Q band （S2QA-） was decreased slightly and shifted down to lower temperatures, compared to the wild type. Thus, the electron flow within PSll of the chlorophyⅡ b-deficient mutant was down-regulated and characterized by faster oxidation of the primary electron acceptor quinine QA-via forward electron flow and slower reduction of the oxidation S states.

关键词： Chl-deficient Chl a fluorescence electron transport fluorescence decay photosystemll thermoluminescence.

Transcriptional analysis of sex pheromone biosynthesis signal genes in Bombyx mori

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Insect Science 2012年第6期19卷 621-632页

作者： Shi-Heng An Meng-fang du Li-Juan Su Xin-Ming Yin College of Plant Protection Henan Agricultural UniversityZhengzhouChina College of Life Science Henan Agricultural UniversityZhengzhouChina

Six sex pheromone synthesis signal genes, including aeyl coenzyme A （acyl- CoA） desaturase （desatl）, fatty acyl reduetase （FAR）, pheromone biosynthesis activating neuropeptide receptor （PBANR）, fatty acid transport protein （FATP）, acyl-CoA binding protein （ACBP） and store-operated channel protein （OrailA）, were studied for their tran- scriptional regulations. The expression profiles of these transcripts at different develop- mental stages （from -96 to 48 h） revealed that the genes are expressed in an age-dependent manner. The transcripts of these genes continued to increase despite decapitation, and compared with normally developmental females, decapitation significantly inhibited their expression. Further experiments with a methoprene, a juvenile hormone （JH） analogue, challenge showed that JH was not a key inhibiting factor in the expression of these genes, and mating was found to significantly inhibit the expression of these marker genes. Alto- gether, the results provide a reference for understanding the mechanism of sex pheromone synthesis.

关键词： Bombyx mori sex pheromone biosynthesis signal genes transcriptionalregulation