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arXiv 2009.07211hep-thgr-qc
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描述具有内禀挠率超弦的Einstein Cartan理论述评

A review of Einstein Cartan Theory to describe superstrings with intrinsic torsion

Richa Kapoor

摘要:

本文回顾了广义相对论在时空挠率存在下的著名推广--爱因斯坦-嘉当理论。真空方程是逐步推导出来的。讨论了确定有物质存在时的场方程的Vielbein公式。对于任何熟悉广义相对论的学生来说,这篇评论都很容易理解。此外,ECT被用来描述超弦的内在扭转,假设一个$D_p$ -膜在存在一个弯曲的背景的NS NS Kalb-Ramond场。D-膜世界体积是一个由狄拉克-玻恩-因菲尔德(DBI)作用量支配的平坦时空。在动力学NS-NS $B$ -场存在时,扭曲张量等于完全反对称挠率。利用这一点,确定了存在挠时$D_p$ -膜作用量的形式.

英文摘要:

This paper reviews the Einstein Cartan theory (ECT), the famous extension of general relativity (GR) in presence of spacetime torsion. The vacuum equations are derived step by step. Vielbein formulation is discussed for determining the field equations in presence of matter. This review would be easily comprehensible for any student familiar with general relativity. Further, ECT is used to describe superstrings with intrinsic torsion, assuming a $D_p$-brane in presence of a curved background of the NS-NS Kalb-Ramond field. D-brane worldvolume is a flat spacetime governed by the Dirac-Born-Infeld (DBI) action. In presence of the dynamical NS-NS $B$-field, the contortion tensor equals the totally antisymmetric torsion. Using this, the form of the $D_p$-brane action in presence of torsion is determined.

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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