查询词典 Bethe

By recalling the ground state and low-dying excited states of Bethe equation and corresponding configuration of quantum numbers, we find their dispersion relations.

通过研究SU(2) Bethe 方程的基态和两种低能激发态的性质及相应的量子数选择，我们给出了其相应的色散关系。

In this dissertation, we construct the Bariev model with nine kinds of boundary fields by the matrices K_± defining the boundaries. And then the Lax operator is given in the form ofmatrix, as well as the basic quantities, e.g., the R -matrix, the monodromy matrices and the transfer matrices are defined. By using the expression of the local Lax operator of the model,the action of the monodromy matrices T, T~(-1), U_ on the pseudo-vacuum state is given outin detail. Furthermore, the main fundamental commutation relations are obtained through the reflection equations, the recursive n-particle state as well as the one-particle exact solution is given and the Bethe ansatz equations are found accordingly. Finally, we list the nesting boundary K matrices, which play a crucial role for obtaining the n-particle solution and finding the Bethe ansatz equations, the eigenvalues of the transfer matrices and the energy spectrum of the system by means of the nested algebraic Bethe ansatz method.

在这篇文章中，我们利用边界K_±矩阵构造出了具有九种边界场的Bariev模型，同时给出了该模型L算子的具体矩阵表示形式，并定义了R矩阵，monodromy矩阵以及转移矩阵；接着利用L算子的矩阵形式，给出了其对应monodromy矩阵T、逆矩阵T~(-1)作用到真空态上的值，并利用Yang-Baxter关系及反射方程得到了双行monodromy矩阵U作用到真空态上的值；然后利用反射方程通过复杂的计算得到了一系列重要的基本对易关系式，并给出了模型的递推的多粒子波函数、单粒子解及Bethe ansat方程；最后给出了模型的嵌套的边界K矩阵的具体形式，从而为运用嵌套Bethe ansatz方法求解该模型的多粒子解、Bethe ansatz方程以及系统的能谱打下了很好的基础。

The second part is for the calculation of the mass spectrum for two-gluon glueballs by using Bethe-Salpeter equation. Our results are in good agreement with those given by lattice simulation and confirm that the lightest glueball is scalar with mass about 1. 7GeV, the mass of tensor glueball is about 2. 4GeV, the masses of pseudoscalar glueball and 2〓 not less than 2. 0GeV.

二是利用Bethe-Salpeter方程计算了双胶子胶球的质量谱，结果与最近的格点规范计算符合得很好，进一步肯定了标量胶球是最轻的胶球，质量约为1.7GeV；张量胶球的质量约为2.4GeV；而赝标胶球和胶球2〓的质量不小于2.0GeV。

The first was written with his adviser, George Gamow, a Russian-born physicist with a puckish turn of mind who obtained permission to include as a co-author Hans Bethe, an authority on the origin of cosmic elements.

一被写了与他的顾问，乔治？Gamow，俄国出生物理学家以获得允许包括作为共同执笔者Hans Bethe 头脑的一个顽皮的轮，当局在宇宙元素的起源。

We used reduced Bethe-salpeter equation to study the properties of heavy flavor mesons at a finite temperature.

我们采用约化的Bethe-Salpeter方程讨论了重味介子在有限温度下的性质，并基于Charmonium谱的统计性质提出了J／Ψ压低的一种新的机制。

We compare the results with the analytic results from the weak coupling limit and the strong coupling limit. As an extension, when think about the dispersion relations for SU(2) trapped bosons, we find that we can not get the inverse effective mass directly from the dispersion relations of the holon-isospin excitation for the wave function from Bethe equation is not the eigenstate wave function of the total momentum.

作为推广，我们还研究了无限深势阱中SU(2)玻色子的各类激发态的色散关系，发现由于直接的Bethe Ansatz 波函数不是总动量的本征态，所以不同通过直接的色散关系来给出质量有效质量比。

In order to obtain the rigorous solutions, we often use the algebraical Bethe ansatz method to solve these models.

在求解模型的过程中除了解析Bethe ansatz方法外，最常用的方法就是代数Bethe ansatz方法，这种方法可以严格地给出模型哈密顿量的本征值和相应的Bethe ansatz方程。

In the procedure of solving those open non-six-vertex-liked models, we generalized the algebraical Bethe ansatz method.

同时利用代数Bethe ansatz方法求解了带非对角边界矩阵的XXZ模型。

Keywords: The algebraical Bethe ansatz; open boundary; exact solution; soliton solution

中文关键词：代数Bethe ansatz方法；开边界；精确解；孤子解

In this paper,the theory of mesonic Bethe-Salpeter equation with instantaneousinteraction is generalized to the case where the mass of the straton is not equal tothat of the antistraton.

本文把在瞬时相互作用下介子 Bethe-Salpeter 方程求解的理论推广到组成介子的层子和反层子质量不一定相等的情形。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。