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We numerically solve the time-dependent Ginzburg–Landau equations for two-gap superconductors using the finite-element technique. The real-time simulation shows that at low magnetic field, the vortices in small-size samples tend to form clusters or other disorder structures. When the sample size is large, stripes appear in the pattern. These results are in good agreement with the previous experimental observations of the intriguing anomalous vortex pattern, providing a reliable theoretical basis for the future applications of multi-gap superconductors. 相似文献
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Based on the Dyson-Schwinger equations (DSEs) in the ‘rainbow‘ approximation, we investigate the quark virtuality in the vacuum state and quantum-chromodynamics (QCD) vacuum condensates. In particular, we calculate the local quark vacuum condensate and quark-gluon mixed condensates, and then the virtuality of quark. The calculated quark virtualities are λu,d^2 0.7 GeV^2 for u, d quarks, and λs^2=1.6 GeV^2 for s quark. Our theoretical predictions are consistent with empirical values used in QCD sum rules, and also fit to lattice QCD predictions. 相似文献
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假设13N是单粒子的2p态的结构,用Glauber多重散射理论计算了1GeV的质子在13N上弹性散射的微分截面,研究了13N的类晕结构.与13C的情况不同,虽然目前还没有关于p-13N弹性散射微分截面的实验材料与我们的理论结果相比较,但是这个理论结果可以作为对未来的实验测量工作的一个指导,特别是对兰州近代物理研究所的晕核实验研究工作有参考和指导价值.参照先前我们对13C晕核结构的理论预言和进而的实验证实,本文的计算结果清楚地表明:13N可能存在着一个类晕的质子皮结构.因此,实验上测量p-13N弹性散射的微分截面就是当前需要马上进行的一个实验研究工作. 相似文献
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基于夸克传播子的Dyson-Schwinger方程,计算了夸克胶子混合真空凝聚和夸克真空凝聚. 这些凝聚不仅联系着夸克在真空态中的虚度,而且也表征了真空中夸克分布的空间宽度. 真空凝聚的存在直接反映着QCD真空的非微扰结构. 计算表明:上夸克与下夸克的虚度为λ2u,d=0.7GeV2,奇异夸克的虚度为λ2s=1.6GeV2. 这些结果与许多用完全不同的方法得到的结果一致. 相似文献
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Based on our previous study of the QCD inspired eikonalized model for describing vector meson photoproduction, pp, and \(\bar p\) p elastic scattering at high energies, we apply the mode to high energy K ± p elastic scattering. The total cross section σ tot(s), differential cross section dσ/dt, the ratio of the real part to imaginary part of the forward scattering amplitude ρ(s), and nuclear slope parameter function β(s) are calculated in the model. Our results show that the theoretical prediction for σ tot(s) is in a good agreement with the experimental data within error bars of the data. For the other theoretical predictions there are no data to test the predictive power of the model. We need the corresponding experimental data to examinate the validity of our QCD inspired eikonalized model. However, our calculations clearly show that the Odderon exchange in the process makes a significant contribution to the observable of ρ(s) and β(s). Therefore, we may conclude that there is a good opportunity to find the QCD Odderon in the K ± p elastic scattering at high energies. 相似文献
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中学数学的许多函数图象和曲线都与渐近线密切相关,如反比例函数、指数函数、对数函数、三角函数、分式函数、双勾函数及几类简单的超越函数等的图象都与渐近线有着千丝万缕的联系,在这些函数的图象中渐近线的定位作用可谓举足轻重.但由于学生在学习过程中不能深刻领会“渐近线”的内涵,忽视“渐近线”的现象频频发生,从而导致在综合应用知识的过程中出现偏差. 相似文献