论文标题

重新审视黑洞潮汐响应的匹配:相对论和对数校正的系统研究

Revisiting the matching of black hole tidal responses: a systematic study of relativistic and logarithmic corrections

论文作者

Ivanov, Mikhail M., Zhou, Zihan

论文摘要

全球有效田间理论(EFT)给出了黑洞保守潮汐反应(爱数),耗散数字以及它们的spin-0和spin-1类似物的量表不变的定义。在本文的第一部分中,我们展示了EFT如何允许我们在不使用分析持续处方的情况下规避源/响应歧义。如果纽约后(PN)对外部来源的校正与响应重叠,则会出现源/响应歧义。但是,可以使用EFT清楚地识别和隔离这些PN校正。我们说明,通过计算各种外部场的静态单点函数,扰动四维Schwarzschild几何形状。在重新亮相所有相关的Feynman图后,我们发现可能模仿响应实际上对静态黑洞的PN术语。因此,从与EFT和一般相对(GR)计算相匹配的爱数数字的提取是完全明确的,这意味着爱数对于所有类型的扰动都相同消失。我们还详细研究了在EFT中的另一种微调,缺乏爱情数字的运行。我们表明,对爱情数字的对数校正确实源于通用仪表中的单个环图,但是在所有图中求和后取消。在特定情况下,如果使用kaluza-klein度量分解,则完全不存在Spin-0和Spin-2场的对数。在本文的第二部分中,我们使用Schwinger-keldysh形式主义计算对单点函数的频率依赖性耗散响应贡献。我们通过比较EFT和GR中的单点函数来提取黑洞耗散数。我们的结果与从明显的吸收横截面的明显规格不变匹配获得的结果完全吻合。

The worldline effective field theory (EFT) gives a gauge-invariant definition of black hole conservative tidal responses (Love numbers), dissipation numbers, and their spin-0 and spin-1 analogs. In the first part of this paper we show how the EFT allows us to circumvent the source/response ambiguity without having to use the analytic continuation prescription. The source/response ambiguity appears if Post-Newtonian (PN)corrections to external sources overlap with the response. However, these PN corrections can be clearly identified and isolated using the EFT. We illustrate that by computing static one-point functions of various external fields perturbing the four-dimensional Schwarzschild geometry. Upon resumming all relevant Feynman diagrams, we find that the PN terms that may mimic the response actually vanish for static black holes. Thus, the extraction of Love numbers from matching the EFT and general relativity (GR) calculations is completely unambiguous, and it implies that the Love numbers vanish identically for all types of perturbations. We also study in detail another type of fine tuning in the EFT, the absence of Love numbers' running. We show that logarithmic corrections to Love numbers do stem from individual loop diagrams in generic gauges, but cancel after all diagrams are summed over. In the particular cases of spin-0 and spin-2 fields the logarithms are completely absent if one uses the Kaluza-Klein metric decomposition. In the second part of the paper we compute frequency-dependent dissipative response contributions to the one-point functions using the Schwinger-Keldysh formalism. We extract black hole dissipation numbers by comparing the one-point functions in the EFT and GR. Our results are in perfect agreement with those obtained from a manifestly gauge-invariant matching of absorption cross-sections.

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