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arXiv 1203.4076gr-qc
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广义相对论是一个更简单的理论吗?

Is General Relativity a simpler theory?

Martin Rivas

摘要:

引力被理解为时空的几何化。但是,在变分法中,时空也是无自旋点粒子边界值的流形。既然所有已知的物质、重子、轻子和规范玻色子都是旋转的物体,这就意味着我们称之为运动学空间的流形,我们在其中玩基本粒子的变分形式主义的游戏,它比时空大。这个流形的任何力学系统是一个芬斯勒度量空间,使变分形式主义总是可以解释为一个测地线问题在这个空间。这个流形就是自由无自旋粒子的平坦闵可夫斯基空间。任何相互作用都会像引力一样修正它的平坦芬斯勒度规。同样的事情也发生在旋转的物体上,但是现在芬斯勒度规空间有更多的维度,它的度规会被任何相互作用所修正,所以把引力简化为只对时空度规的修正,就可以得到一个更简单的理论,即无自旋物质的引力理论。甚至通常的假设,即度规的修改只涉及度规系数对时空变量的依赖性,也是一个限制,因为一般来说,这些系数依赖于速度。根据所有力的统一精神,引力原则上不能产生一种不同于任何其他相互作用的、更简单的几何化。

英文摘要:

Gravity is understood as a geometrization of spacetime. But spacetime is also the manifold of the boundary values of the spinless point particle in a variational approach. Since all known matter, baryons, leptons and gauge bosons are spinning objects, it means that the manifold, which we call the kinematical space, where we play the game of the variational formalism of an elementary particle is greater than spacetime. This manifold for any mechanical system is a Finsler metric space such that the variational formalism can always be interpreted as a geodesic problem on this space. This manifold is just the flat Minkowski space for the free spinless particle. Any interaction modifies its flat Finsler metric as gravitation does. The same thing happens for the spinning objects but now the Finsler metric space has more dimensions and its metric is modified by any interaction, so that to reduce gravity to the modification only of the spacetime metric is to make a simpler theory, the gravitational theory of spinless matter. Even the usual assumption that the modification of the metric only involves dependence of the metric coefficients on the spacetime variables is also a restriction because in general these coefficients are dependent on the velocities. In the spirit of unification of all forces, gravity cannot produce, in principle, a different and simpler geometrization than any other interaction.

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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