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arXiv 0912.2858gr-qchep-th
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有挠时空中的变分原理与自由落体

Variational principle and free falling in a space-time with torsion

Rolando Gaitan D., Juan Petit, Alfredo Mejía

摘要:

比较了研究有挠时空中自由下落的无自旋粒子的两种可能的变分原理。众所周知,从标准世界线作用量出发,利用基于非完整映射的变分原理可以得到自平行轨道。与此相反,我们探索一个世界线行动与修改的度量,考虑旧的想法扭曲(扭转)潜力。一个固定端的变分原理可以再现自平行轨道,而不受时空挠率的限制。作为例子,我们考虑了微扰Weitzenb $\ddot{o}$ ck时空。最后建立了非微扰问题。

英文摘要:

A comparison between the two possible variational principles for the study of a free falling spinless particle in a space-time with torsion is noted. It is well known that the autoparallel trajectories can be obtained from a variational principle based on a non-holonomic mapping, starting with the standard world-line action. In a contrast, we explore a world-line action with a modified metric, thinking about the old idea of contorsion (torsion) potentials. A fixed-ends variational principle can reproduce autoparallel trajectories without restrictions on space-time torsion. As an illustration we have considered a perturbative Weitzenb$\ddot{o}$ck space-time. The non-perturbative problem is stablished at the end.

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。

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