标题： 参数化后牛顿扩张的陈-西蒙斯引力 显示英文标题

标题： Parametrized Post-Newtonian Expansion of Chern-Simons Gravity

摘要： 我们研究了弱场近似下Chern-Simons引力场方程解的后牛顿展开，该引力场有一个完美流体源。 特别是，我们研究了这个解到度规参数化后牛顿形式的映射，达到1 PN阶。 我们发现，除了包含一个与Chern-Simons耦合参数和PPN矢量势的旋度成正比的新项外，Chern-Simons引力的PPN参数与广义相对论相同。 我们还发现，由于时空非线性，这个新项自然地被增强，并且我们为其提供了物理解释。 通过将其修正映射到引力电磁框架，我们研究了这个新项对点粒子加速度和陀螺进动的拖拽效应引入的修正。 我们发现，这些经典预测中的Chern-Simons修正可以被当前和未来的实验用来限制Chern-Simons引力和弦理论的基本参数。 显示英文摘要

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.