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Optical parity gate and a wide range of entangled states generation

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Science China(Physics,Mechanics & Astronomy) 2015年第4期58卷 30-39页

作者： lin qing College of Information Science and Engineering Huaqiao University (Xiamen)

Generating entangled states efficiently is a hot topic in the area of quantum information *** the approach presented in this paper,a general parity gate could be realized and a wide range of entangled states,including GHZ state,W state,Dicke state,arbitrary graph state and locally maximally entanglable states,can be generated *** generation of GHZ state,W state,and Dicke state is probabilistic but heralded and the total success probability is *** addition,the arbitrary graph state and locally maximally entanglable states generation is deterministic,flexible,and highly ***,with the"simultaneous"generation pattern,the complexity of the graph state generation and locally maximally entanglable states generation could be reduced greatly,providing a more efficient and feasible way to generate the entangled states.

关键词： parity gate entangled states cross phase modulation c-path gate quantum information

Realization of Bipartite Positive-Operator-Value Measurements of Two-Photon Polarization States

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Communications in Theoretical Physics 2009年第2期51卷 244-246页

作者： lin qing College of Information Science and Engineering Huaqiao University Quanzhou 362021 China

In this letter, we propose a scheme of a special quantum optical Fredkin gate assisted by optical manip- ulations and postselection from the coincidence measurements, and then modify it with cross-Kerr nonlinearities to be suitable for the realization of all possible positive operator-valued measurements of bipartite polarization states. This scheme is feasible in the lab with the current experimental technology.

关键词： POVM linear optics cross-Kerr nonlinearity

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Skew Motzkin Paths

Acta Mathematica Sinica,English Series 2017年第5期33卷 657-667页

作者： qing lin LU School of Mathematics and Statistics Jiangsu Normal University Xuzhou 221116 P. R. China

In this paper, we study the class S of skew Motzkin paths, i.e., of those lattice paths that are in the first quadrat, which begin at the origin, end on the x-axis, consist of up steps U =（1, 1）,down steps D =（1,-1）, horizontal steps H =（1, 0）, and left steps L =（-1,-1）, and such that up steps never overlap with left steps. Let S;be the set of all skew Motzkin paths of length n and let 8;= |S;|. Firstly we derive a counting formula, a recurrence and a convolution formula for sequence{8;}n≥0. Then we present several involutions on S;and consider the number of their fixed *** we consider the enumeration of some statistics on S;.

关键词： Dyck path Motzkin path skew Motzkin path enumeration

The Early X-ray Afterglows of Optically Bright and Dark Gamma-Ray Bursts

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Chinese Journal of Astronomy and Astrophysics 2006年第5期6卷 555-560页

作者： Yi-qing lin Astronomy Department Nanjing University Nanjing 210093

A systematic study on the early X-ray afterglows of both optically bright and dark gamma-ray bursts （B-GRBs and D-GRBs） observed by Swift is presented. Our sample includes 25 GRBs of which 13 are B-GRBs and 12 are D-GRBs. Our results show that the distributions of the X-ray afterglow fluxes （Fx）, the gamma-ray fluxes （Sγ）, and the ratio （Rγ,x） are similar for the two kinds of GRBs, that any observed differences should be simply statistical fluctuation. These results indicate that the progenitors of the two kinds of GRBs are of the same population with comparable total energies of explosion. The suppression of optical emission in the D-GRBs should result from circumburst but not from their central engine.

关键词： gamma rays bursts

Pathways for Epidermal Cell Differentiation via the Homeobox Gene GLABRA2:Update on the Roles of the Classic Regulator

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Journal of Integrative Plant Biology 2012年第10期54卷 729-737页

作者： lin qing Takashi Aoyama State Key Laboratory of Protein and Plant Gene Research College of Life Sciences Peking University Beijing 100871 China Institute for Chemical Research Kyoto University Uji Kyoto 611-0011 Japan

Recent plant development studies have identified regulatory pathways for epidermal cell differentiation in Arabidopsis thafiana. Interestingly, some of such pathways contain transcriptional networks with a common structure in which the homeobox gene GLABLA2 （GL2） is downstream of the transactivation complex consisting of MYB, bHLH, and WD40 proteins. Here, we review the role of GL2 as an output device of the conserved network, and update the knowledge of epidermal cell differentiation pathways downstream of GL2. Despite the consistent position of GL2 within the network, its role in epidermal tissues varies; in the root epidermis, GL2 promotes non-hair cell differentiation after cell pattern formation, whereas inthe leaf epidermis, it is likely to be involved in both pattern formation and differentiation of trichomes. GL2 expression levels act as quantitative factors for initiation of cell differentiation in the root and leaf epidermis; the quantity of hairless cells in non-root hair cell files is reduced by g12 mutations in a semi-dominant manner, and entopically additive expression of GL2 and a heterozygous g12 mutation increase and decrease the number of trichomes, respectively. Although few direct target genes have been identified, evidence from genetic and expression analyses suggests that GL2 directly regulates genes with various hierarchies in epidermal cell differentiation pathways.

关键词： Morphogenesis pattern formation root hair trichome transcription factor.

Comparison between Swift and pre-Swift gamma-ray bursts

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Research in Astronomy and Astrophysics 2009年第6期9卷 682-686页

作者： Yi-qing lin Department of Mathematics and Physics Xiamen University of Technology Xiamen 361024 China

The gamma-ray burst （GRB） mission Swift has made a much deeper GRB survey than any previous one. I present a systematical comparison between GRB samples detected with pre-Swift missions and those from Swift, in order to investigate whether they show any statistical difference. Our Swift GRB sample includes the bursts detected by Swift/BAT before 2007 September. With both flux-limited surveys and redshift-known GRB samples, I show that, apparently, the observed distributions of the redshifts, T90, and log N- log P are significantly different, but not for the spectral hardness ratio, fluence and Eiso. The redshifts of the Swift GRB sample are statistically larger than those of pre-Swift GRBs, with a mean of 1.95±0.17 compared to ～ 1 for pre-Swift GRBs. The cosmological effect on the observables is thus considerable. This effect on the spectral hardness ratio, fluence and Eiso is cancelled out, and the distributions of these quantities indeed do not show significant differences between the Swift and pre-Sw/ft GRBs. Taking this effect into account, I found that the corrected distributions of T90 for long GRBs and log N - log P observed with Swift/BAT are also consistent with those observed with CGRO/BATSE. These results indicate that the Swift and pre-Swift GRBs are from the same population.

关键词： gamma-rays bursts

Using hydrochemical signatures to characterize the long-period evolution of groundwater information in the Dagu River Basin,China

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Frontiers of Environmental Science & Engineering 2021年第5期15卷 311-323页

作者： Ziyue Yin qing lin Shaohui Xu School of Environmental Science and Engineering Qingdao UniversityQingdao266071China

The evolution of hydrochemical compositions influenced by long-period interactions between groundwater and the geo-environment is a fundamental issue for exploring groundwater quality and *** study systematically investigated the hydrochemical processes and anthropogenic interference occurring in the river basin by bivariate plots,Gibbs diagrams,saturation index,and the major ions *** changes in groundwater hydrochemistry have been observed in the study area,illustrating the origins of major ions are affected by various internal and external *** highlighted that TDS varied from freshwater to brackish water,ranging between 187.90 and 2294.81 mg/***^(2+)and HCO_(3)^(−)are the dominant ions in the studied *** results gained by Gibbs diagrams,bivariate plots,saturation index,and the major ions ratios demonstrated that minerals dissolution/precipitation,cation exchange,and human inputs play crucial roles in the unconfined ***,the overuse of nitrogen fertilizer,livestock manure,and industrial/domestic sewage led to nitrate and nitrite contamination and brought significant challenges to the surrounding *** present study could make an unambiguous identification of natural processes and anthropogenic interventions influencing groundwater hydrochemistry’s long-period evolution and create a preliminary strategy for groundwater resources management.

关键词： Groundwater quality Hydrochemical signatures Spatial-temporal variations Water-rock interactions Anthropogenic interventions

Numerical simulation of dynamic large deformation and fracture damage for solid armature in electromagnetic railgun

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Defence Technology（防务技术） 2020年第2期16卷 348-353页

作者： qing-hua lin Bao-ming Li National Key Laboratory of Transient Physics Nanjing University of Science and TechnologyP.O.Box210094NanjingPR China

The design of solid armature of railgun should take full account of its operating conditions and material properties because the armature is subjected to dynamic loading conditions and experiences a complicated electrical,thermal and mechanical process in the interior ballistic *** this paper present,we first introduced a multi-physical field model of railgun,followed by several examples to investigate the launching ***,we used the explicit finite element method,in which material nonlinearity and geometric nonlinearity were accounted,to investigate the deform behaviors of solid *** results show that the dynamic mechanical process of armature is dependent on the armature geometry,material and exciting electric *** the numerical simulation,the understanding of the fracture mechanism of solid armature was deepened.

关键词： Electromagnetic railgun Solid armature Fracture Explicit finite element Numerical simulation

Optical quantum router with cross-phase modulation

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Science China(Information Sciences) 2014年第12期57卷 146-156页

作者： CHEN YeWang lin qing College of Computer Science and Technology Huaqiao University (Xiamen) College of Information Science and Engineering Huaqiao University (Xiamen)

The quantum router is a key part of a quantum *** to design a fully quantum router is a dominant theme in the area of quantum *** on the cross-phase modulation technique,we propose a scheme to realize an optical quantum router using the c-path operation for its basic *** router is a perfect,fully quantum router,and it is available for arbitrary(separated or entangled)input signals and covers all possible control modes(the general n-control-m mode).Moreover,this router protects target signals and preserves quantum features,such as coherent superposition and *** is a new and powerful feature when compared with classical *** the development of current experimental technology,our scheme is feasible.

关键词： quantum communication quantum network quantum router cross-phase modulation quantum superposition quantum entanglement