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Re-study of Nucleon Pole Contribution in j.ψ→N(?)π Decay

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Communications in theoretical {1. 2006年第9期46卷 507-513页

作者： ZONG Yuan-Yuan,~(1.2. SHEN Peng-Nian,~(1.3.4) ZOU Bing-Song,~(1.3.4) LIU j.-Feng,~2.LIANG w.i-Hong~2.1.institute of High Energy {1., the Chinese Academy of Sciences, P.O. Box 91.(4), Beij.ng 1.0049, china 2.12. of {1., Guangxi Normal university, Guilin 541.04, china 3.Center of theoretical Nuclear {1., National Laboratory of Heavy Ion Accelerator, Lanzhou 73.000, china 4 institute of theoretical {1., the Chinese Academy of Sciences, Beij.ng 1.0080, china institute of High Energy {1. the Chinese Academy of Sciences P.O. Box 9184 Beijing 100049 department of {1. Guangxi Normal University Guilin 541004

w. re-study nucleon pole contribution in j.ψ→NNπ decays by including the imaginary part for the propagator of the off-shell nucleon w.th energy above πN threshold. It is found that w.en including the imaginary part in the propagator, the branching ratio of the decay w.dth w.ll descend about 1.% compared w.th the result w.thout including the imaginary part, no matter w.ether including the off-shell form factors or not. It also leads to a phase of up to 2.° for the off-shell nucleon propagator at invariant mass around 1.00 MeV. This effect needs to be considered for detailed partial w.ve analysis of N* resonances around this mass region.

关键词： j.ψ decay form factor

Impurity in Pairw.se Entanglement of Heisenberg XX Open Chain

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Communications in theoretical {1. 2007年第12期 1009-1016页

作者： XI Xiao-Qiang~(1,2.CHEN w.n-Xue~1 LIU Qi~3.and YUE Rui-Hong~3.1 department of Applied Mathematics and {2.,Xi’an institute of Posts and Telecommunications,Xi’an 710061,china~2.j.int Laboratory of Advanced Technology in Measurements,Beij.ng National Laboratory for Condensed Matter {2.,institute of {2.,the Chinese Academy of Sciences,Beij.ng 100080,china~3.institute of Modern {2.,North-w.st university,Xi’an 710069,china department of Applied Mathematics and {1. Xi'an Institute of Posts and Telecommunications Xi'an 710061 China j.int Laboratory of Advanced Technology in Measurements Beijing National Laboratory for Condensed Matter Physics Institute of Physics the Chinese Academy of Sciences Beijing 100080 China department of Applied Mathematics and {1. Xi'an Institute of Posts and Telecommunications Xi'an 710061 China institute of Modern {1. North-West University Xi'an 710069 China

w. calculate the concurrence of all pairw.se entanglement of Heisenberg XX open chain w.th single systemimpurity in three-qubit and four-qubit cases,and find that the impurity par{3.eter j.i has great effect on *** the proper par{3.eter j.i,w. can obtain the maximal pairw.se entanglement of the nearestqubits and make the non-nearest qubits entangle.

关键词： system impurity pairw.se entanglement Heisenberg XX chain

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一种空时体积与引力的激发和跃迁生成模式

物理学报 2011年第12期60卷 44-48页

作者：邵丹邵亮邵常贵江汉大学光电信息研究所武汉430056 武汉科技大学应用物理系武汉430081 湖北第二师范学院理论物理研究所武汉430205

利用4单形及其对偶1.骨架,描述了纯空时的跃迁.对自旋网编织成的三维空间在跃迁的两个台阶间体积的改变做出了证明.给出了四维空时体积的一个平坦量子涨落模型.利用自旋网腿中的圈线刺过曲面时产生的激发,获得了三维空间的2.对称离散张... 详细信息

利用4单形及其对偶1.骨架,描述了纯空时的跃迁.对自旋网编织成的三维空间在跃迁的两个台阶间体积的改变做出了证明.给出了四维空时体积的一个平坦量子涨落模型.利用自旋网腿中的圈线刺过曲面时产生的激发,获得了三维空间的2.对称离散张量hab,按照空时是激发和跃迁体系的观点,得到了离散引力场hμν的产生与改变机制.

关键词：体积量子膨胀空时度规涨落引力扰动的激发 2.对称张量的产生

Classification and Functional Separable Solutions to Extended Nonlinear w.ve Equations

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Communications in theoretical {1. 2005年第10期44卷 589-596页

作者： ZHANG Shun--Li LOU Sen--Yue QU Chang--Zheng YUE Rui--Hong institute of Modern {1., North{2.st {3., Xi'an 71.069, china department of Mathematics, North{2.st {3., Xi'an 71.069, china Center of Nonlinear Science, Ningbo {3., Ningbo 3.1}2.1}, china department of {1., Shanghai j.ao Tong {3., Shanghai 2.003., china institute of Modern {1. Northwest University department of Mathematics Northwest University Center of Nonlinear Science Ningbo University department of {1. Shanghai Jiao Tong University

The generalized conditional Symmetry approach is applied to study the variable separation of the extendedw.ve equations. Complete classification of those equations admitting functional separable solutions is obtained ... 详细信息

关键词： nonlinear w.ve equations functional separable solutions generalized conditional symmetry

Lie Point Symmetries of Differential-Difference Equations

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Communications in theoretical {1. 2004年第5期41卷 645-648页

作者： DING w.i~1.TANG Xiao-Yan~(2.3. 1.department of Applied Mathematics,Shanghai j.ao Tong {1.,Shanghai 2.003.,china2.department of physics,Shanghai j.ao Tong {1.,Shanghai 2.003.,china3.State Key Laboratory of Scientific and Engineering Computing,{12. of Computational Mathematics and Scientific Engineering Computing,Academy of Mathematics and System Sciences,the Chinese Academy of Sciences,P.O.Box 2.1.,Beij.ng 1.0080,china State Key Laboratory of Scientific and Engineering Computing Institute of Computational Mathematics and Scientific Engineering Computing Academy of Mathematics and System Sciences the Chinese Academy of Sciences P.O. Box 2719 Beijing 100080 China

In this paper,the classical Lie group approach is extended to find some Lie point symmetries of differential-difference *** reveals that the obtained Lie point symmetries can constitute a Kac-Moody-Virasoro algebra.

关键词： Lie point symmetry differential-difference equation Kac Moody-Virasoro algebra

Profile of the composition fractions in neutron stars

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Chinese Science Bulletin 2002年第8期47卷 632-634页

作者： LI w.nfei, ZHANG Fengshou & CHEN Liew.nCenter of {2. Nuclear {{3., National Laboratory of Heavy Ion Accelerator, Lanzhou 73.000, china institute of Modern {{3., Chinese Academy of Sciences, Lanzhou 73.000, china department of {{3., Shangh Center of theoretical Nuclear {1. National Laboratory of Heavy Ion Accelerator Lanzhou China institute of Modern {1. Chinese Academy of Sciences Lanzhou China department of {1. Shanghai Jiao Tong University Shanghai China

The composition fractions of β-stable neutron stars and their radial distributions are investigated based on Skyrme-Hartree-Fock theory and Tolman-Oppenheimer-Volkoff (TOV) equation. It is found that a pure neutron interior w.th a radius of 3.5 km can exist in the neutron stars. w.en the radius is greater than 3.5 km, the fractions of the proton, electron and μ- appear and increase w.th the increment of the radius, then decrease after reaching their maximum at the radius of 8 km. These results make it possible to further study the thermal evolution and magnetic properties of the neutron stars.

关键词： neutron stars compositon fractions asymmetric nuclear matter equation of state Tolman-Oppenheimer-Volkoff equation.

Anomalous dielectric behavior in nanocrystalline γ-Fe_2._3

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Chinese Science Bulletin 1999年第2期44卷 186-189页

作者： YE Xisheng , SHA j.an , CHEN Bin , j.AO Zhengkuan ZHANG Lide{2. of {{3., Zhej.ang university, Hangzhou 3.3.02., china Northw.st institute of Nuclear Technology, Xi’ an 7{3.02., china institute of theoretical {{3., Chinese Academy of Sciences, Beij.ng {3.0080, china institute of Solid State {{3., Chinese Academy of Sciences, Hefei 2.003.3. china department of {1. Zhejiang University Hangzhou China Northw.t institute of Nuclear Technology Xi’an China institute of {1. {2. Chinese Academy of Sciences Beijing China institute of Solid State {1. Chinese Academy of Sciences Hefie China

The measurements of electric capacities and dielectric loss angles for nanocrystalline yFe2.3.under air and vacuum atmospheres have been conducted by using ac LRC method, and the conductivity and the polarization rela... 详细信息

The measurements of electric capacities and dielectric loss angles for nanocrystalline yFe2./sub>O3./sub> under air and vacuum atmospheres have been conducted by using ac LRC method, and the conductivity and the polarization relaxation time have also been calculated from the frequency spectra of real and imaginary parts of the dielectric constants. The anomalous dielectric behavior implies the existence of tw. kinds of polarization mechanisms w.th different relaxation times, w.ich are caused by the defects and the dangling bonds in the interfaces, respectively. The experimental and calculated results indicated that the polarization loss and the conductance loss are dominant in air atmosphere and vacuum, respectively.

关键词： nanocrystalline γ-Fe2.3 dielectric behavior polarization mechanism.

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煤自燃初期的反应机理研究

燃料化学学报 2004年第6期32卷 652-657页

作者：石婷邓军王小芳文振翼西北大学化学系陕西西安710069 西安科技大学陕西西安710054

从实验得到的可能引起煤自燃的8个活性基团入手,提出了一系列简单煤分子模型,利用密度泛函DFT 6 3.0}对其完成了几何优化,计算了包括反应焓变、吉布斯自由能和活化能等,从热力学和动力学角度分析了计算结果。基于理论计算获得了煤活性基... 详细信息

从实验得到的可能引起煤自燃的8个活性基团入手,提出了一系列简单煤分子模型,利用密度泛函DFT 6 3.0}对其完成了几何优化,计算了包括反应焓变、吉布斯自由能和活化能等,从热力学和动力学角度分析了计算结果。基于理论计算获得了煤活性基团的活泼性次序,得出了煤自燃初期的反应机理主要是氧分子先进攻煤分子中的活性基团,产生活泼性很高的中间体,然后中间体进一步反应得到水或二氧化碳及其他反应产物,计算结果与实验基本符合。

关键词：煤活性基团活化能反应饥理

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量子引力的曲率两点真空相关

物理学报 2004年第2期53卷 367-372页

作者：邵丹邵亮邵常贵陈贻汉 department of Mathematical Sciences Ibarati University 湖北大学理论物理研究所武汉430062

以平坦的Minkow.ki时空为背景 ,得到了任意坐标系和谐和坐标系中 ,n维GR引力和高导数引力的引力子自由传播子 ,求得了四种可能的曲率两点真空相关函数的首项 .用微扰计算证明了曲率的两点真空相关函数在GR引力中为零 ,而在高导数引力中... 详细信息

以平坦的Minkow.ki时空为背景 ,得到了任意坐标系和谐和坐标系中 ,n维GR引力和高导数引力的引力子自由传播子 ,求得了四种可能的曲率两点真空相关函数的首项 .用微扰计算证明了曲率的两点真空相关函数在GR引力中为零 ,而在高导数引力中不为零 .讨论了高导数引力与GR的引力子传播子。

关键词：量子引力曲率真空相关函数平移传播子高导数引力任意坐标系谐和坐标系引力子自由传播子微扰理论