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arXiv 0810.2388gr-qc
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对称遥平行引力:某些精确解和旋量耦合

Symmetric Teleparallel Gravity: Some exact solutions and spinor couplings

Muzaffer Adak, Özcan Sert, Mestan Kalay, Murat Sarı

摘要:

在本文中,我们详细阐述了对称远程平行引力(STPG)写在一个非零非度量,但零挠率和零曲率的非黎曼时空。首先,我们给出了一个从特殊规范中的度规得到非度规性的方法。然后,我们指出,在一个新的处方平行运输的切向量在这个非黎曼几何的自平行曲线重合的黎曼时空。随后,我们表示的对称远程平行引力理论的最一般的二次和宇称守恒拉格朗日与拉格朗日乘子为零挠率和曲率。我们表明,我们的拉格朗日是等价的爱因斯坦-希尔伯特拉格朗日耦合系数的某些值。因此,我们通过独立变分来计算场方程。然后,我们依次获得共形,球对称静态,宇宙和PP波的解决方案。最后,我们讨论了自旋为1/2的场与STPG的最小耦合。

英文摘要:

In this paper we elaborate on the symmetric teleparallel gravity (STPG) written in a non-Riemannian spacetime with nonzero nonmetricity, but zero torsion and zero curvature. Firstly we give a prescription for obtaining the nonmetricity from the metric in a peculiar gauge. Then we state that under a novel prescription of parallel transportation of a tangent vector in this non-Riemannian geometry the autoparallel curves coincides with those of the Riemannian spacetimes. Subsequently we represent the symmetric teleparallel theory of gravity by the most general quadratic and parity conserving lagrangian with lagrange multipliers for vanishing torsion and curvature. We show that our lagrangian is equivalent to the Einstein-Hilbert lagrangian for certain values of coupling coefficients. Thus we arrive at calculating the field equations via independent variations. Then we obtain in turn conformal, spherically symmetric static, cosmological and pp-wave solutions exactly. Finally we discuss a minimal coupling of a spin-1/2 field to STPG.

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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