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arXiv 1306.5965math-phhep-thmath.MP
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多尺度时空中的相对论粒子

Relativistic particle in multiscale spacetimes

Gianluca Calcagni

摘要:

我们研究的行动和动力学的相对论粒子,不带电或带电,在多尺度时空。在重新参数化和庞加莱对称下的不变性唯一地确定了作用量和线元是通常的作用量和线元,而没有这些几何中粒子力学的典型权重因子。由此产生的时空只在空间方向上是多尺度的。这个版本的系统也是由恢复的非相对论性的限制,以及与麦克斯韦和电动力学场论的兼容性。放弃所有这些要求,并允许在时间方向上的一个非平凡的权重因子产生一个修改的线元素,并大大复杂的带电粒子的情况下的动力学。

英文摘要:

We study the action and the dynamics of a relativistic particle, uncharged or charged, in multiscale spacetimes. Invariance under reparametrizations and Poincaré symmetries uniquely determine the action and the line element to be the usual ones, without the weight factors typical of particle mechanics in these geometries. The resulting spacetime is multiscale only along spatial directions. This version of the system is also dictated by recovery of the nonrelativistic limit together with compatibility with Maxwell and electrodynamics field theory. Giving up all these requirements and allowing for a nontrivial weight factor in the time direction produces a modified line element and considerably complicates the dynamics in the case of a charged particle.

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