arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1305.3497hep-thastro-ph.COgr-qc
收藏

多尺度时空中的变电荷

Varying electric charge in multiscale spacetimes

Gianluca Calcagni, Joao Magueijo, David Rodríguez Fernández

摘要:

利用加权拉普拉斯算子,导出了多尺度时空中麦克斯韦场论和电动力学的协变运动方程。一个有效的时空相关的几何起源的电荷自然地出现在理论中,从而产生了一个变化的精细结构常数。该理论与其他变耦合模型,如与变化的电荷或变化的光速。该理论还面临着宇宙学观测,这可能会对多重分数测度中的特征尺度产生约束。我们注意到,这里考虑的模型是从根本上不同于以前提出的文献中,无论是变e或变c说服。

英文摘要:

We derive the covariant equations of motion for Maxwell field theory and electrodynamics in multiscale spacetimes with weighted Laplacian. An effective spacetime-dependent electric charge of geometric origin naturally emerges from the theory, thus giving rise to a varying fine-structure constant. The theory is compared with other varying-coupling models, such as those with a varying electric charge or varying speed of light. The theory is also confronted with cosmological observations, which can place constraints on the characteristic scales in the multifractional measure. We note that the model considered here is fundamentally different from those previously proposed in the literature, either of the varying-e or varying-c persuasion.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑