Jakobsen Gustav Uhre, Mogull Gustav, Plefka Jan, Steinhoff Jan
Institut für Physik und IRIS Adlershof, Humboldt-Universität zu Berlin, Zum Großen Windkanal 2, 12489 Berlin, Germany.
Max Planck Institute for Gravitational Physics (Albert Einstein Institute), Am Mühlenberg 1, 14476 Potsdam, Germany.
Phys Rev Lett. 2021 May 21;126(20):201103. doi: 10.1103/PhysRevLett.126.201103.
Using the recently established formalism of a worldline quantum field theory description of the classical scattering of two spinless black holes, we compute the far-field time-domain waveform of the gravitational waves produced in the encounter at leading order in the post-Minkowskian (weak field but generic velocity) expansion. We reproduce the previous results of Kovacs and Thorne in a highly economic way. Then, using the waveform, we extract the leading-order total radiated angular momentum and energy (including differential results). Our work may enable crucial improvements of gravitational-wave predictions in the regime of large relative velocities.
利用最近建立的世界线量子场论形式来描述两个无自旋黑洞的经典散射，我们在后闵可夫斯基（弱场但一般速度）展开的主导阶上，计算了相遇过程中产生的引力波的远场时域波形。我们以一种非常简洁的方式重现了科瓦奇和索恩之前的结果。然后，利用该波形，我们提取了主导阶的总辐射角动量和能量（包括微分结果）。我们的工作可能会在大相对速度 regime 中对引力波预测做出关键改进。
