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arXiv 1502.07245gr-qc
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第四后牛顿有效单体动力学

Fourth post-Newtonian effective one-body dynamics

Thibault Damour, Piotr Jaranowski, Gerhard Schäfer

摘要:

引力相互作用的两点质量系统的保守动力学最近已经在第四后牛顿(4PN)近似下确定[T.Damour,P.Jaranowski,and G.Schäfer,Phys. Rev. D 89,064058(2014)],并发现在时间上是非局域的。我们将展示如何转录这种动态有效的一体化(EOB)形式主义。为了实现这一EOB转录,我们开发了一种新的策略,涉及(无限)的非局部动力学的一个普通的作用角哈密顿订单减少。我们的最终,等效EOB动力学包括两个(本地)径向势,$A(r)$和$\bar{D}(r)$,和一个非测地线质量壳贡献$Q(r,p_r)$由径向动量$p_r$的偶数幂的无穷级数给出。使用有效的作用技术,我们完成了我们的4PN水平的结果,推导出两个不同的,高阶保守的贡献与尾输运遗传效应:5PN水平的EOB对数项,以及5. 5PN水平,半积分项。我们比较我们改进的分析知识,以前的,数值引力自力计算的进动效应。

英文摘要:

The conservative dynamics of gravitationally interacting two-point-mass systems has been recently determined at the fourth post-Newtonian (4PN) approximation [T.Damour, P.Jaranowski, and G.Schäfer, Phys. Rev. D 89, 064058 (2014)], and found to be nonlocal in time. We show how to transcribe this dynamics within the effective one-body (EOB) formalism. To achieve this EOB transcription, we develop a new strategy involving the (infinite-)order-reduction of a nonlocal dynamics to an ordinary action-angle Hamiltonian. Our final, equivalent EOB dynamics comprises two (local) radial potentials, $A(r)$ and $\bar{D}(r)$, and a nongeodesic mass-shell contribution $Q(r,p_r)$ given by an infinite series of even powers of the radial momentum $p_r$. Using an effective action technique, we complete our 4PN-level results by deriving two different, higher-order conservative contributions linked to tail-transported hereditary effects: the 5PN-level EOB logarithmic terms, as well as the 5.5PN-level, half-integral terms. We compare our improved analytical knowledge to previous, numerical gravitational-self-force computation of precession effects.

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