论文标题
BPS Skyrme的五维Skyrme模型的子模型
BPS Skyrme Submodels of The Five Dimensional Skyrme Model
论文作者
论文摘要
在本文中,我们使用BPS lagrangian方法在五维时空中的某些BPS子模型中搜索BPS Skyrmions。我们专注于Bogomolny方程的静态解决方案及其具有拓扑电荷的相应能量$ B> 0 $是整数。我们考虑了两个主要情况,基于BPS子模型的有效拉格朗日的对称性,即球面对称和非球面对称情况。对于球形对称情况,我们找到两个BPS子模型。第一个bps的子模型由潜在项和与拓扑电流正方形成比例的术语组成。第二个BPS的子模型仅由Skyrme项组成。第二个bps子模型具有BPS Skyrmions,具有相同的拓扑费$ b> 1 $,但是用不同的能量,我们称其为“拓扑归化” BPS Skyrmions。如果拓扑电荷是质量数字,它还具有相等能量的通常的BPS天空。 BPS Skyrmions的另一个有趣的功能,即$ B> 1 $,在此BPS子模型中,这些BPS Skyrmions在角方向上具有非零的压力。对于非球面对称情况,只有一个BPS子模型,与球形对称情况下的第一个BPS子模型相似。我们发现,BPS Skyrmions取决于常数$ K $,而对于$ K $的特定值,我们在球形对称的情况下获得了第一个BPS子模型的BPS Skyrmions。这些BPS天空的总静态和拓扑电荷也取决于该常数。我们还表明,本文中发现的所有结果都满足相应BPS子模型运动的完整场方程。
In this paper, we search for the BPS skyrmions in some BPS submodels of the generalized Skyrme model in five-dimensional spacetime using the BPS Lagrangian method. We focus on the static solutions of the Bogomolny's equations and their corresponding energies with topological charge $B>0$ is an integer. We consider two main cases based on the symmetry of the effective Lagrangian of the BPS submodels, i.e. the spherically symmetric and non-spherically symmetric cases. For the spherically symmetric case, we find two BPS submodels. The first BPS submodels consist of a potential term and a term proportional to the square of the topological current. The second BPS submodels consist of only the Skyrme term. The second BPS submodel has BPS skyrmions with the same topological charge $B>1$, but with different energies, that we shall call "topological degenerate" BPS skyrmions. It also has the usual BPS skyrmions with equal energies, if the topological charge is a prime number. Another interesting feature of the BPS skyrmions, with $B>1$, in this BPS submodel, is that these BPS skyrmions have non-zero pressures in the angular direction. For the non-spherically symmetric case, there is only one BPS submodel, which is similar to the first BPS submodel in the spherically symmetric case. We find that the BPS skyrmions depend on a constant $k$ and for a particular value of $k$ we obtain the BPS skyrmions of the first BPS submodel in the spherically symmetric case. The total static energy and the topological charge of these BPS skyrmions also depend on this constant. We also show that all the results found in this paper satisfy the full field equations of motions of the corresponding BPS submodels.