arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1903.01445gr-qc
收藏

一种新的改进的能量动量张量及其在引力中的可能作用

A New Improved Energy-Momentum Tensor and Its Possible Role in Gravity

Tao Lei, Zi-Wei Chen, Zhen-Lai Wang, Xiang-Song Chen*

摘要:

基于量子测量中的特殊考虑,我们提出了一种新的改进的能量动量张量。新的张量不同于传统的正则张量和对称张量,并且可以从具有二阶导数的拉格朗日量导出为Nother流。我们还试图构造一个引力耦合,使得新的能量-动量张量成为引力场的源。我们得到的理论是一个爱因斯坦-嘉当型,但来自一个最小的耦合拉格朗日与二阶导数,并导致额外的相互作用之间的扭转和物质,包括标量场。对于标量场,理论也可以在黎曼时空中通过非极小耦合导出。我们的研究为广义相对论效应的更一般的检验提供了线索。

英文摘要:

Motivated by a special consideration in quantum measurement, we present a new improved energy-momentum tensor. The new tensor differs from the traditional canonical and symmetric ones, and can be derived as Nother current from a Lagrangian with second derivative. We also attempt to construct a gravitational coupling in such a way that the new energy-momentum tensor becomes the source of the gravitational field. The theory we obtain is of an Einstein-Cartan type, but derived from a minimal coupling of a Lagrangian with second-derivative, and leads to additional interaction between torsion and matter, including the scalar field. For the scalar field, the theory can also be derived in the Riemann space-time by a non-minimal coupling. Our study gives hint on more general tests of general relativistic effects.

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。

↑