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Non-Markovian Effects on Entanglement Dynamics of Three Qubits

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Communications in Theoretical Physics 2008年第11期50卷 1123-1128页

作者： ZHANG Zhu-qiang WANG An-Min qiu Liang Department of Modern Physics University of Science and Technology of China Hefei 230026 China

We investigate entanglement dynamics of three independent qubits each locally interacting with a zero-temperature non-Markovian *** effects of environment's amount of non-Markovianity or parameters in initialstates on the three-qubit entanglement dynamics are presented in *** is found that the entanglement of such asystem revives after a finite dark period when a proper degree of non-Markovian is present.A deep comparison to thatin two-qubit system is also made.

关键词： non-Markovian entanglement sudden death revival

Regional estimates of POC export flux derived from thorium-234 in the western Arctic Ocean

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Acta Oceanologica Sinica 2005年第6期24卷 97-108页

作者： MA qiang CHEN Min qiu Yusheng LI Yanping Department of Oceanography Xiamen University Xiamen 361005 China Department of Oceanography Xiamen University Xiamen 361005 China State Key Laboratory of Marine Environmental Science Xiamen University Xiamen 361005 China Department of Oceanography Xiamen University Xiamen 361005 China State Key Laboratory of Marine Environmental Science Xiamen University Xiamen 361005 China State Key Laboratory of Marine Environmental Science Xiamen University Xiamen 361005 China

In order to elucidate the regional export variation of participate organiccarbon in the western Arctic Ocean, samples vertically integrated between 0 and 100 m depth orbetween 0 and 30 m/40 m depth were collected for total ^(234)Th measurements and those from 30 m/40m or 100 m depth were collected for paniculate ^(234)Th measurements during the Second ChineseArctic Expedition in July— September 2003. The removal fluxes and residence time of ^(234)Th in theupper water column were calculated by using irreversible steady-state scavenging model. The resultsshowed that, total ^(234)Th was deficit relative to its parent ^(238)U in the western Arctic Oceanexcept in the western Chukchi shelf and the slope regions around 160°W, indicating that scavengingand removal processes play an important role in element biogeochemical cycle in the Arctic Ocean. Inthe western Chukchi shelf and the slope regions around 160°W, total ^(234)Th was excess relativeto ^(238)U, ascribing to the horizontal input of ^(234)Th adsorbed by ice-rafted ***-234 removal fluxes decreased from the shelf to the deep ocean, while the residence time of^(234)Th increased from shelf to offshore, demonstrating that particle scavenging and removalprocesses are more active in the shelf regions. The estimated POC export fluxes from 40 m in theshelf regions and from 100 m in the slope and deep ocean varied between 1.6 and 27.5 mmol/(m^2·d),and between 1.8 and 14.4 mmol/(m^2·d), respectively. The averaged POC export fluxes over the entirewater column decreased from the shelf to the deep ocean, indicating that the Chukchi shelf is animportant region for organic carbon sequestration. The high ThE ratios (ratio of POC export fluxderived from ^(234)Th/^(238)U disequilibria to primary production) in the western Arctic Oceansuggested that the biological pump runs actively in high-latitudes.

关键词： POC export flux ^(234)Th western arctic ocean

A Three-dimensional Non-fullerene Small Molecule Acceptor for Solution-processed Organic Solar Cellst

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Chinese Journal of Chemistry 2017年第11期35卷 1687-1692页

作者： Meijia Chang Yunchuang Wang Nailiang qiu Yuan-qiu-qiang Yi Xiangjian Wan Chenxi Li Yongshen Chen State Key Laboratory of Elemento-Organic Chemistry Centre of Nanoscale Science and Technology andKey La- boratory of Functional Polymer Materials College of Chemistry Nankai University Tianjin 300071 China

An acceptor-donor-acceptor （A-D-A） three-dimensional （3D） small molecule acceptor （SFTTIC）, using spiro- bifluorene as the core unit linking with four thieno[3,2-b]thiophenes （TT） and end-capped with 2-（3-oxo-2,3-dihy- dro-lH-inden-l-ylidene）malononitrile （INCN） was developed for solution processed organic solar cells. SFTTIC has a high absorption coefficient up to 3.12 × 105 mol-1,cm-1, good thermal stability and appropriate energy levels. The optimized power conversion efficiency （PCE） of 5.66% and 4.65% was achieved for the devices with PBDB-T：SFTTIC and PTB7-Th：SFTTIC, respectively.

关键词： organic solar cells non-fullerene acceptor solution processed three-dimensional structure

Genomic insights into adaptation to bipedal saltation and desert-like habitats of jerboas

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Science China(Life Sciences) 2024年第9期67卷 2003-2015页

作者： Simin Chai Yujie Chong Daiqing Yin qiang qiu Shixia Xu Guang Yang Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou) Guangzhou 511458China Jiangsu Key Laboratory for Biodiversity and Biotechnology School of Life SciencesNanjing Normal UniversityNanjing 210023China School of Ecology and Environment Northwestern Polytechnical UniversityXi’an 710072China

Jerboas is a lineage of small rodents displaying atypical mouse-like morphology with elongated strong hindlimbs and short *** have evolved obligate bipedal saltation and acute senses,and been well-adapted to vast desert-like *** a newly sequenced chromosome-scale genome of the Mongolian five-toed jerboa(Orientallactaga sibirica),our comparative genomic analyses and in vitro functional assays showed that the genetic innovations in both protein-coding and non-coding regions played an important role in jerboa morphological and physiological ***-specific amino acid substitutions,and segment insertions/deletions(indels)in conserved non-coding elements(CNEs)were found in components of proteoglycan biosynthesis pathway(XYLT1 and CHSY1),which plays an important role in limb ***,we found specific evolutionary changes functionally associated with energy or water metabolism(e.g.,specific amino acid substitutions in ND5 and indels in CNEs physically near ROR2)and senses(e.g.,expansion of vomeronasal receptors and the FAM136A gene family)in *** dual-luciferase reporter assay verified that some of the CNEs with jerboa-specific segment indels exerted a significantly different influence on luciferase activity,suggesting changes in their regulatory function in *** results revealed the potential molecular mechanisms underlying jerboa adaptation since the divergence from the Eocene-Oligocene transition,and provided more resources and new insights to enhance our understanding of the molecular basis underlying the phenotypic diversity and the environmental adaptation of mammals.

关键词： jerboa adaptive evolution comparative genomics conserved non-coding elements bipedal saltation

Morphological Evolution of Fe-Rich Phases in the AlSi_9Cu_3Mg_(0.19)(Fe)Alloy with the Addition of Minor Mn and Cr

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Acta Metallurgica Sinica(English Letters) 2018年第6期31卷 629-640页

作者： Zhi-qiang qiu Xiang-Chen Meng qiu-Hong Yuan Xiao-Shu Zeng Xi-Xin Rao Yan Ding Lan Luo Yong Liu Key Laboratory of Lightweight and High Strength Structural Materials of Jiangxi Province Nanchang University Physical Science and Technology College Yichun University School of Materials Science and Engineering Nanchang University

The morphological evolution of Fe-rich phases in the Alalloy has been investigated with various contents of Fe,Mn,and *** results show that coarse Chinese script Fe-rich phases appear in the alloy with 0.6 wt%Fe combined with trace Mn,while the blocky Fe-rich phases appear combined with trace *** the coexistence of trace Mn and Cr,a large number of fine Chinese script Fe-rich phases could be visible in the low iron-bearing AlSi_9Cu_3-alloy（0.60 wt%）.At high Fe level（1.30 wt%）,numerous Fe-rich phases with hexagonal morphologies are observed with the trace Cr,while fish-bone and pentagonal morphologies of Fe-rich phases could be simultaneously observed with the addition of both Mn and *** results reveal that the trace Mn and Cr promote the morphological evolution of Fe-rich *** morphology evolution mechanism of Fe-rich phases has been discussed by using the atom radius and electronegativity differences of Fe,Mn,and Cr.

关键词： AlSi_9Cu_3Mg_(0.19)(Fe) alloy Fe-rich phase Sludge factor Microalloying Electronegativity differences

Creep resistance of as-cast Mg-5Al-5Ca-2Sn alloy

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China Foundry 2017年第4期14卷 265-271页

作者： Guang Zhang Ke-qiang qiu Qing-chun Xiang Ying-lei Ren School of Materials Science and Engineering Shenyang University of TechnologyShenyang 110870China

In the present study, creep properties of as-cast Mg-5Al-5Ca-2Sn(AXT552) alloy were investigated by means of a GWT304 creep testing machine at temperatures of 175 °C and 200 °C in the stress range of 35-90 MPa. Results show that creep rates increase with applied stress at an identical temperature. Creep strain at 100 hours is 0.0518% and 0.083% at creep conditions of 175°C/75 MPa and 200°C/60 MPa, respectively, which is comparable to MRI230 D and much lower than most of AX series alloys. By the observation and analysis for samples before and after creep tests using a Shimadzu XRD-7000 type X-ray diffractometer(XRD) and a Hitachi S-3400 N type scanning electron microscope(SEM), it was found that Al_2Ca(C15) phase precipitated out of C36 phase or matrix. The cavity formation and connection at the interface of soft matrix and hard intermetallics caused the propagation of cracking along the eutectic phase during creep process and dislocation accommodated grain/phase boundary sliding is expected to be the dominant creep mechanism.

关键词： as-cast AXT552 alloy creep properties creep rate creep strain microstructure

Ultrahigh Density of Atomic CoFe-Electron Synergy in Noncontinuous Carbon Matrix for Highly Efficient Magnetic Wave Adsorption

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Nano-Micro Letters 2022年第6期14卷 192-205页

作者： Wenhuan Huang qiang qiu Xiufang Yang Shouwei Zuo Jianan Bai Huabin Zhang Ke Pei Renchao Che Key Laboratory of Chemical Additives for China National Light Industry College of Chemistry and Chemical EngineeringShaanxi University of Science and TechnologyXi’an 710021People’s Republic of China KAUST Catalysis Center King Abdullah University of Science and Technology23955-6900 ThuwalKingdom of Saudi Arabia Laboratory of Advanced Materials Shanghai Key Lab of Molecular Catalysis and Innovative MaterialsFudan UniversityShanghai 200438People’s Republic of China

Improving the atom utilization of metals and clarifying the M–M’interaction is both greatly significant in assembling high-performance ultra-light electromagnetic wave-absorbing ***,a high-temperature explosion strategy has been successfully applied to assemble the hierarchical porous carbon sponge with Co–Fe decoration via the pyrolysis of the energetic metal organic *** as-constructed hybrid displays a superior reflection loss(RL)value of-57.7 d B and a specific RL value of-192 d B mg-1 mm-1 at 12.08 GHz with a layer thickness of 2.0 mm(loading of 15 wt%).The off-axis electron hologram characterizes the highly distributed numerous polarized nanodomain variable capacitors,demonstrating the dipole and interfacial polarization along the edges of the *** importantly,the X-ray absorption spectroscopy analysis verifies the mutual interaction between the metal cluster and carbon matrix and the electronic coupling responsible for the greatly improved electromagnetic wave absorption.

关键词： Electromagnetic wave-absorbing materials Off-axis electron hologram M-M’interaction Hierarchical porous structure Energetic metal organic framework

A new way to synthesize ZnS nanoparticles

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Chinese Chemical Letters 2007年第4期18卷 483-486页

作者： Heng Zhi Zeng Ke qiang qiu Yuan Yuan Du Wen Zhang Li College of Chemistry and Chemical Engineering Central South University Changsha 410083 China

ZnS nanoparticles were prepared with normal ZnO and Na2S by solid-liquid chemical reaction under ultrasonic condition and characterized by XRD, TEM, SEM, IR and TG-DTG. The results showed that these particles were good crystal cubic zinc blended with average size of 50 nm, possess good IR transmittance in the range of 400-4000 cm and good thermal stability.

关键词： . Solid-liquid chemical reaction Nano-ZnS Crystal

Efficacy of long-term orthokeratology treatment in children with anisometropic myopia

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International Journal of Ophthalmology(English edition) 2022年第1期15卷 113-118页

作者： Kai-Yun Zhang Hui-Bin Lyu Jia-Rui Yang Wei-qiang qiu Department of Ophthalmology Peking University Third HospitalBeijing 100191China College of Optometry Peking University Health Science CenterBeijing100191China Beijing Key Laboratory of Restoration of Damaged Ocular Nerve Peking University Third HospitalBeijing 100191China

AIM:To explore the efficacy of the orthokeratology lens for anisometropic myopia ***:A retrospective study was *** refraction and axial length(AL)were collected from 50 children(10.52±1.72 y)who visited Peking University Third Hospital from July 2015 to August *** children’s one eyes(Group A)received monocular orthokeratology lenses at first,after different durations(12.20±6.94 mo),their contralateral eyes(Group B)developed myopia and receive orthokeratology as *** data in 1-year of binocular period were *** growth rate(difference of follow-up and baseline per month)were compared between two groups by paired t *** differences of AL were compared by Wilcoxon ***:During monocular period,the AL growth rate of the Group A(0.008±0.022 mm/mo)was significantly slower than that of the Group B(0.038±0.018 mm/mo;P<0.0001).However,during binocular period,the AL growth rate of the Group A(0.026±0.014 mm/mo)was significantly faster than that of the Group B(0.016±0.015 mm/mo;P<0.0001).The AL difference between both eyes was 0.6(0.46)mm,then significantly decreased to 0.22(0.39)mm when started binocular treatment(P<0.0001).However,it was significantly increased to 0.30(0.32)mm after a year(P<0.0001),but still significantly lower than baseline(P<0.0001).CONCLUSION:The orthokeratology lens is efficient for control the AL elongation of monocular myopia eyes and reduce *** the condition that the contralateral eyes develop myopia and receive orthokeratology lens later,there is no efficiency observed on control interocular difference of AL during binocular treatment.

关键词： orthokeratology anisometropia myopia axial length children