标题： 超导全局弦中的激励场 显示英文标题

标题： Excitation Fields in a Superconducting Global String

摘要： 在一种设定中考察了一个直的超导全局宇宙弦模型，其中弦支持一个由沿弦传播的行波描述的电荷/电流脉冲。 对于理论中标量和矢量场的涨落，得到了线性化场方程，并找到了当弦的线性电荷密度和电流大小相等时的一组近似特解。 尽管运动方程似乎表明弦核心内的标量和矢量激发场是具有质量的，但特解显示它们表现为有效无质量的场，沿着弦以光速与主要电荷/电流脉冲一起传播。 质量参数的影响是对激发场的径向轮廓进行调制。 矢量激发场为电场和磁场产生径向和角向分量，但特解并未描述从弦发出或吸收电磁辐射的情况。 显示英文摘要

摘要： A model of a straight superconducting global cosmic string is examined in a setting wherein the string supports a charge/current pulse described by a travelling wave along the string. Linearized field equations are obtained for fluctuations of the scalar and vector fields of the theory, and a set of approximate particular solutions are found for the case in which the linear charge density and the current of the string have equal magnitudes. Although the equations of motion seem to suggest that the scalar and vector excitation fields are massive inside the string core, the particular solutions show that they behave as effectively massless fields which propagate at the speed of light along the string along with the primary charge/current pulse. The effect of the mass parameter is to modulate the radial profile of the excitation fields. The vector excitation field generates radial and angular components for both the electric and magnetic fields, but the particular solutions do not describe the emission or absorption of electromagnetic radiation from the string.