Laguna Pablo, Natchu Vishnu, Matzner Richard A, Vachaspati Tanmay
Department of Astronomy and Astrophysics, IGPG, CGWP, Penn State University, University Park, Pennsylvania 16802, USA.
Phys Rev Lett. 2007 Jan 26;98(4):041602. doi: 10.1103/PhysRevLett.98.041602. Epub 2007 Jan 22.
We study the intercommuting of semilocal strings and Skyrmions for a wide range of internal parameters, velocities, and intersection angles by numerically evolving the equations of motion. We find that the collisions of strings and strings, strings and Skyrmions, and Skyrmions and Skyrmions all lead to intercommuting for a wide range of parameters. Even the collisions of unstable Skyrmions and strings lead to intercommuting, demonstrating that the phenomenon of intercommuting is very robust, extending to dissimilar field configurations that are not stationary solutions. Even more remarkably, at least for the semilocal U(2) formulation considered here, all intercommutations trigger a reversion to Nielsen-Olesen strings.
我们通过对运动方程进行数值演化，研究了在广泛的内部参数、速度和交角范围内半局部弦与斯格明子的相互交换。我们发现，弦与弦、弦与斯格明子以及斯格明子与斯格明子之间的碰撞在广泛的参数范围内都会导致相互交换。甚至不稳定的斯格明子与弦之间的碰撞也会导致相互交换，这表明相互交换现象非常稳健，延伸到了非定常解的不同场构型。更值得注意的是，至少对于这里所考虑的半局部U(2)形式，所有的相互交换都会引发向尼尔森 - 奥尔斯en弦的反转。
