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arXiv 0704.0299hep-thastro-phgr-qc
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Chern-Simons引力的参数化后牛顿展开

Parametrized Post-Newtonian Expansion of Chern-Simons Gravity

Stephon Alexander, Nicolas Yunes

摘要:

研究了具有理想流体源的Chern-Simons引力场方程的弱场后牛顿展开式。特别是,我们研究了这个解决方案的参数化后牛顿形式主义的映射到1 PN为了度量。我们发现,Chern-Simons引力的PPN参数与广义相对论的PPN参数完全相同,只是增加了一个与Chern-Simons耦合参数和PPN矢量势的旋度成正比的新项.我们还发现这个新项由于时空的非线性而自然增强,并给出了一个物理解释,通过将这个修正映射到引力-电磁框架中,我们研究了这个新项对点粒子加速度和陀螺进动中的框架拖曳效应的修正.我们发现,陈-西蒙斯对这些经典预言的修正可以被当前和未来的实验用来给陈-西蒙斯引力的内禀参数以及弦论的内禀参数设定界限。

英文摘要:

We investigate the weak-field, post-Newtonian expansion to the solution of the field equations in Chern-Simons gravity with a perfect fluid source. In particular, we study the mapping of this solution to the parameterized post-Newtonian formalism to 1 PN order in the metric. We find that the PPN parameters of Chern-Simons gravity are identical to those of general relativity, with the exception of the inclusion of a new term that is proportional to the Chern-Simons coupling parameter and the curl of the PPN vector potentials. We also find that the new term is naturally enhanced by the non-linearity of spacetime and we provide a physical interpretation for it. By mapping this correction to the gravito-electro-magnetic framework, we study the corrections that this new term introduces to the acceleration of point particles and the frame-dragging effect in gyroscopic precession. We find that the Chern-Simons correction to these classical predictions could be used by current and future experiments to place bounds on intrinsic parameters of Chern-Simons gravity and, thus, string theory.

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