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arXiv 2102.10059hep-thgr-qc
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后闵可夫斯基守恒动力学有效场论方法中的自旋效应

Spin Effects in the Effective Field Theory Approach to Post-Minkowskian Conservative Dynamics

Zhengwen Liu, Rafael A. Porto, Zixin Yang

摘要:

世界线有效场论(EFT)的形式主义后牛顿政权的旋转机构的基础上,我们推广的EFT方法后闵可夫斯基(PM)动力学,包括旋转自由度在一个明显的协变框架。我们介绍了一个系统的程序来计算的总变化的动量和自旋的引力散射的紧凑的对象。对于自旋与轨道角动量对齐的特殊情况,我们展示了如何使用边界到边界对应来构造类椭圆轨道的径向作用量。作为一个典型的例子,我们解决了散射问题的下一个领先的PM为了线性和双线性自旋效应和任意的初始条件,第一次有限尺寸的修正。我们从所得的散射数据中得到了对准自旋径向作用量,并导出了圆轨道的近星点推进和结合能。我们还提供了(平方)质心动量${\cal O}(G^2)$,这可能是用来重建一个哈密尔顿。我们的结果与已有的文献完全一致,同时扩展了自旋二次紧双星PM动力学的知识。

英文摘要:

Building upon the worldline effective field theory (EFT) formalism for spinning bodies developed for the Post-Newtonian regime, we generalize the EFT approach to Post-Minkowskian (PM) dynamics to include rotational degrees of freedom in a manifestly covariant framework. We introduce a systematic procedure to compute the total change in momentum and spin in the gravitational scattering of compact objects. For the special case of spins aligned with the orbital angular momentum, we show how to construct the radial action for elliptic-like orbits using the Boundary-to-Bound correspondence. As a paradigmatic example, we solve the scattering problem to next-to-leading PM order with linear and bilinear spin effects and arbitrary initial conditions, incorporating for the first time finite-size corrections. We obtain the aligned-spin radial action from the resulting scattering data, and derive the periastron advance and binding energy for circular orbits. We also provide the (square of the) center-of-mass momentum to ${\cal O}(G^2)$, which may be used to reconstruct a Hamiltonian. Our results are in perfect agreement with the existent literature, while at the same time extend the knowledge of the PM dynamics of compact binaries at quadratic order in spins.

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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