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Stability of proton and maximally symmetric minimal unification model for basic forces and building blocks of matter

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Science china(physics,Mechanics & Astronomy) 2007年第3期50卷 303-310页

作者： WU YueLiang institute of Theoretical physics, chinese academy of sciences, Beijing 100080, china 1. institute of Theoretical physics Chinese Academy of Sciences Beijing 100080 China

With the hypothesis that all independent degrees of freedom of basic building blocks should be treated equally on the same footing and correlated by a possible maximal symmetry, we arrive at a 4-dimensional space-time unification model. In this model the basic building blocks are Majorana fermions in the spinor repre- sentation of 14-dimensional quantum space-time with a gauge symmetry GM4D = SO(1,3)×SU(32)×U(1)A×SU(3)F. The model leads to new physics including mirror particles of the standard model. It enables us to issue some fundamental questions that include: why our living space-time is 4-dimensional, why parity is not con- served in our world, how the stability of proton is, what the origin of CP violation is and what the dark matter can be.

关键词： gauge symmetry space-time symmetries beyond standard model and unification

A study of two-dimensional magnetic polaron

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Science china(physics,Mechanics & Astronomy) 2006年第4期49卷 421-429页

作者： LIU Tao1, ZHANG Huaihong1, FENG Mang1,2 & WANG Kelin1,3 1. School of Science, Southwest University of Science and Technology, Mianyang 621010, china 2. wuhan institute of physics and mathematics, chinese academy of sciences, wuhan 430070, china 3. Department of Modern physics, University of Science and Technology of china, Hefei 230026, china School of Science Southwest University of Science Technology Mianyang 621010 China wuhan institute of physics mathematics Chinese Academy of Sciences Wuhan 430070 China Department of Modern physics University of Science Technology of china Hefei 230026 China

By using the variational method and anneal simulation, we study in this paper the self-trapped magnetic polaron (STMP) in two-dimensional anti-ferromagnetic material and the bound magnetic polaron (BMP) in ferromagnetic material. Schwinger angular momentum theory is applied to changing the problem into a coupling problem of carriers and two types of Bosons. Our calculation shows that there are single-peak and multi-peak structures in the two-dimensional STMP. For the ferromagnetic material, the properties of the two-dimensional BMP are almost the same as that in one-dimensional case; but for the anti-ferromagnetic material, the two-dimensional STMP structure is much richer than the one-dimensional case.

关键词： self-trapped magnetic polaron, bound magnetic polaron, impurity potential, anti-ferromagnet.

OSCILLATOR STRENGTH OF THE LITHIUM ISOELECTRONIC SEQUENCE

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原子与分子物理学报 1998年第S1期15卷 35-36页

作者： Qu Lianhua Li BaiwenLaboratory of Magnetic Resonance and Atomic and Molecular physics, wuhaninstitute of physics, chinese academy of Science wuhan 430071

１ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅｓｔｕｄｙｏｆｔｒａｎｓｉｔｉｏｎｒａｔｅｓｉｓａｓｕｂｊｅｃｔｏｆｃｏｎｓｉｄｅｒａｂｌｅｉｎｔｅｒｅｓｔｆｏｒｍａｎｙｆｉｅｌｄｓ．Ｔｏｏｂｔａｉｎａｎａｃｃｕｒａｔｅｔｒａｎｓｉ... 详细信息

１ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅｓｔｕｄｙｏｆｔｒａｎｓｉｔｉｏｎｒａｔｅｓｉｓａｓｕｂｊｅｃｔｏｆｃｏｎｓｉｄｅｒａｂｌｅｉｎｔｅｒｅｓｔｆｏｒｍａｎｙｆｉｅｌｄｓ．Ｔｏｏｂｔａｉｎａｎａｃｃｕｒａｔｅｔｒａｎｓｉｔｉｏｎｒａｔｅ，ａｃｃｕｒａｔｅ...

关键词： Oscillator Strength

STUDY ON THE CONCENTRATION DEPENDENCE OF ORIENTATION OF POLYSTYRENE ON SILVER BY THE SERS TECHNIQUE

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chinese Journal of Polymer Science 2000年第2期18卷 177-180页

作者： Dong-hui Zhang Jin-gui Qin Jing-shu Shen You Wang Wan-jun Liu Department of Chemistry, wuhan University, wuhan 430072, china Polymer physics Laboratory, institute of Chemistry, chinese academy of sciences Beijing 100080, china wuhan Univ Dept Chem Wuhan 430072 Peoples R China chinese Acad Sci Inst Chem Polymer Phys Lab Beijing 100080 Peoples R China

Polystyrene films were adsorbed onto a silver surface from dichloromethane solutions with concentrations of 0.1 to 12 wt%, and then studied by the surface enhanced Raman technique. A critical concentration for coil in... 详细信息

关键词： surface enhanced Raman scattering (SERS) polystyrene concentration dependence

The lepton flavor violating signal of the extra gauge boson Z′in photon-photon collision at the ILC

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Science china(physics,Mechanics & Astronomy) 2010年第11期53卷 1992-1997页

作者： LIU GuoLi 1,2 1 physics Department,Zhengzhou University,Zhengzhou 450001,china 2 Kavli institute for Theoretical physics china,chinese academy of sciences,Beijing 100190,china 1. physics Department Zhengzhou University Zhengzhou 450001 China2. Kavli Institute for Theoretical Physics China Chinese Academy of Sciences Beijing 100190 China

The hitherto unconstrained lepton flavor mixings,induced by the new gauge boson Z ,which are the prediction of many new physics models,such as topcolor-assisted technicolor (TC2) models and flavor-universal TC2 models,may lead to the lepton flavor violating productions of τμˉ,τeˉ and μeˉ in photon-photon collision at the proposed International Linear Collider (ILC).Through a comparative analysis of these processes,we find that the better channel to probe the new physics models is the production of τμˉ or τeˉ which occurs at a much higher rate than μeˉ production due to the large mixing angle and the large flavor changing coupling,and may reach the detectable level of the ILC for a large part of the parameter *** the rates predicted by the Standard Model are far below the detectable level,these processes may serve as a sensitive probe for such new physics models.

关键词： new gauge boson Z lepton flavor violating processes photon-photon

Preparation And Characterization of a New Blend of Poly(2-hydroxyethyl methacrylate) And Poly(ethylene glycol)

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chinese Chemical Letters 1997年第11期8卷 953-956页

作者： Wei Bin CHEN Han Qiao FENG Da Yong HE Chao Hui YE(Laboratory of Magnetic Resonance and Atomic and Molecular physics, wuhan institute of physics and mathematics, chinese academy of sciences, wuhan 430071.)(Polymer physics Laboratory, Changchun institute chinese Acad Sci Wuhan Inst Phys & Math Lab Magnet Resonance & Atom & Mol Phys Wuhan 430071 Peoples R China chinese Acad Sci Changchun Inst Appl Chem Polymer Phys Lab Changchun 130022 Peoples R China

A new blend of poly(2-hydroxyethyl methacrylate) (PHEMA) with poly (ethylene glycol) (PEG) was prepared. The results from solid-state NMR indicate that the PHEMA/PEG(88:12, w/w) blend is miscible on a molecular level.

关键词： PHEMA Preparation And Characterization of a New Blend of Poly ethylene glycol hydroxyethyl methacrylate Blend

Synthesis and Characterization of PEG-like Structures on Nitinol Surface under ECR-cold-plasma

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Journal of wuhan University of Technology(Materials Science) 2005年第1期20卷 33-36页

作者：杨隽 institute of Plasma physics Chinese Academy of Sciences Anhui 230031 China School of Materials Science and Engineering Wuhan Institute of Chemical Tech nologyWuhan 430073China

The synthesis and characterization of PEG-like macromolecular structures on Nit inol surface from tri (ethylene glycol) dimethyl-ether under ECR-cold-plasma conditions were discussed. It was demonstrated that based on high-resolution ES CA, ATR-FTIR and contact angle investigations, the deposited PEG-like layers a re composed mainly of -CH 2-CH 2-O- linkages. These structures have a relati vely low contact angle. Compared to the unmodified surfaces, the plasma-treated Nitinol surfaces are more hydrophilic. Plasma enhanced coatings of PEG-like la yers can prevent Ni ion from releasing, thereby improving the biocompatibility o f Nitinol.

关键词： cold-plasma Nitinol modification PEG-like s tructures

Central simple Poisson algebras

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Science china mathematics 2004年第2期47卷 245-263页

作者： SU Yucai & XU XiaopingDepartment of mathematics, Shanghai Jiaotong University, Shanghai 200030, china institute of mathematics, academy of mathematics and System sciences, chinese academy of sciences, Beijing 100080, china 1.Department of mathematics Shanghai Jiaotong University 200030 Shanghai China 2.Institute of Mathematics Academy of Mathematics and System Sciences Chinese Academy of Sciences 100080 Beijing China

Poisson algebras are fundamental algebraic structures in physics and symplectic geometry. However, the structure theory of Poisson algebras has not been well developed. In this paper, we determine the structure of the central simple Poisson algebras related to locally finite derivations, over an algebraically closed field of characteristic *** Lie algebra structures of these Poisson algebras are in general not finitely-graded.

关键词： Poisson algebra, locally-finite operator, derivation, finitely-graded, isomorphism class.

A Two-Dimensional Hyperbolic System of Nonlinear Conservation Laws with Functional Solutions

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Acta Mathematica Sinica,English Series 1999年第3期15卷 317-332页

作者： Jiaxin Hu wuhan institute of physics and mathematics, Academia Sinica, P.O.Box 71010, wuhan 430071, P. R. china CMAP, Ecole Polytechnique, 91128 Palaiseau Cedex, France wuhan institute of physics and mathematics Academia Sinica Wuhan P. R. China

A two-dimensional hyperbolic system of nonlinear conservation laws is considered for any piecewise constant initial data having two discontinuity rays with the origin as vertex. One kind of new waves, which is labeled the Dirac-contact wave, appears in the solution. The entropy conditions for the Dirac-contact waves are given. The solutions on the Dirac-contact waves can be viewed as the bounded linear functionals on C0∞（R2×R+）.

关键词： Riemann problem Conservation law Dirac-contact wave