The response of a gravitating object to an external tidal field is encoded in its Love numbers, which identically vanish for classical blackholes (BHs). Here we show, using standard time-independent quantum perturbation theory, that for a quantum BH, generically, the Love numbers are nonvanishing and negative, and that their magnitude depends on the lowest lying levels of the quantum spectrum of the BH. We calculate the quadrupolar electric quantum Love number of nonrotating BHs and show that it depends most strongly on the first excited level of the quantum BH. We then compare our results to the same Love number of exotic ultra compact objects and to that of classical compact stars and highlight their different parametric dependence. Finally, we discuss the detectability of the quadrupolar quantum Love number in future precision gravitational-wave observations and show that, under favourable circumstances, its magnitude is large enough to imprint an observable signature on the gravitational waves emitted during the inspiral phase of two moderately spinning BHs.
Institut des Hautes Études Scientifiques（高等科学研究所）；International Centre for Theoretical Sciences, Tata Institute of Fundamental Research（理论科学国际中心，塔塔基础研究所）
Instituto de Ciencias Exactas y Naturales (ICEN), Universidad Arturo Prat（阿图罗·普拉特大学精确科学与自然学院）；Facultad de Ciencias, Universidad Arturo Prat（阿图罗·普拉特大学理学院）；International Centre for Theoretical Sciences, Tata Institute of Fundamental Research（塔塔基础研究所国际理论科学中心）
Love at First Loop: Quantum Deformability of Near-Extremal Black Holes
Universidad de Murcia（穆尔西亚大学）；CERN（欧洲核子研究组织）；KU Leuven（荷语鲁汶大学）；Leuven Gravity Institute, KU Leuven（荷语鲁汶大学引力研究所）；Institució Catalana de Recerca i Estudis Avançats (ICREA)（加泰罗尼亚高级研究学院）；Universitat de Barcelona（巴塞罗那大学）
Universidade Federal do ABC（ABC联邦大学）；IFT - UNESP & ICTP - SAIFR（圣保罗州立大学物理研究所与ICTP-SAIFR）；CMCC, Universidade Federal do ABC（ABC联邦大学气候中心）；ITP, TU Wien（维也纳工业大学理论物理研究所）
Hawking radiation by spherically-symmetric static black holes for all spins: II -- Numerical emission rates, analytical limits and new constraints
在姊妹论文[Phys. Rev. D 103（2021）10，[2101.02951]]中，我们推导了无质量自旋$(0,1/2,1,2)$的Teukolsky方程在一般球对称和静态度规下的短程势。在这里，我们应用这些结果数值计算的霍金辐射光谱的粒子发射的黑洞（BH）在三个不同的anterior：带电BH，高维BH，聚合BH所产生的模型的量子引力。为了确保我们的数值计算过程的鲁棒性，我们表明，它同意新推导的解析公式的高，低能量限制的横截面。我们展示了如何在代码$\texttt{BlackHawk}$中使用短程势和精确的霍金辐射率来预测非常广泛的BH解的未来原始BH蒸发信号，包括源自环圈量子引力的有希望的规则BH解。特别地，我们从AMEGO中导出了聚合BH的第一个霍金辐射约束。我们证明，质量窗口$10^{16}-10^{18}\,$ g的所有暗物质到原始BH可以重新打开高值的聚合参数，它编码的典型规模和强度的量子引力修正。
Absorption spectrum and greybody factors of charged black holes in loop quantum gravity
Faculdade de Ciências Naturais, Universidade Federal do Pará（帕拉拉联邦大学自然科学学院）；Departamento de Física, Universidade Federal da Paraíba（帕拉伊巴联邦大学物理系）；Instituto Federal do Pará（帕拉拉联邦学院）
