论文标题

紧凑型二进制动力学的有效现场理论

Effective Field Theory for Compact Binary Dynamics

论文作者

Goldberger, Walter D.

论文摘要

我回顾了重力紧凑物体的有效现场理论(EFT)描述。重点是重力扰动的运动学状态,尤其是与重力波检测相关的绝热灵感相。对于此类配置,有一个长度尺度的层次结构,它们在动力学中都起着作用,范围从引力半径到对象的大小,再到其典型的轨道分离,最后是系统发出的辐射的波长。为了解开这些量表,并在扩展参数中实现明显的功率计数,有必要构造一个重力塔,每一个都耦合到不同的线缺陷局部自由度。我描述了每个量表的相关有效理论以及每个物理阈值之间的这些理论之间的匹配。尽管这些方法的主要应用是对经典动力学,但量子重力效应,例如如果与普朗克质量相比,如果动量转移较小,则可以系统地纳入鹰派重力交换。

I review the effective field theory (EFT) description of gravitating compact objects. The focus is on kinematic regimes where gravity is perturbative, in particular the adiabatic inspiral phase relevant to gravitational wave detection. For such configurations, there is a hierarchy of length scales which all play a role in the dynamics, ranging from the gravitational radius, to the size of the objects, to their typical orbital separation, and finally the wavelength of the radiation emitted by the system. To disentangle these scales, and to achieve manifest power counting in the expansion parameter, it is necessary to construct a tower of EFTs of gravity, each coupled to distinct line defect localized degrees of freedom. I describe the relevant effective theories at each scale as well as the matching between these theories across each physical threshold. While the main applications of these methods are to classical dynamics, quantum gravity effects, e.g. Hawking graviton exchange, can be systematically incorporated if the momentum transfers are small compared to the Planck mass.

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