{"total":11,"items":[{"citing_arxiv_id":"2605.17840","ref_index":54,"ref_count":2,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Pole Skipping, Avoided Crossing, and Resonant Excitation in Kerr Quasinormal Modes near Algebraically Special Frequencies","primary_cat":"gr-qc","submitted_at":"2026-05-18T04:21:51+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":6.0,"formal_verification":"none","one_line_summary":"Kerr QNM anomalies near algebraically special frequencies arise from avoided crossings with resonant excitation and pole skipping due to quasinormal-Matsubara pole-zero cancellations.","context_count":0,"top_context_role":null,"top_context_polarity":null,"context_text":null},{"citing_arxiv_id":"2605.16199","ref_index":26,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Detectability of avoided crossings in black hole ringdowns","primary_cat":"gr-qc","submitted_at":"2026-05-15T17:13:43+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":6.0,"formal_verification":"none","one_line_summary":"Bayesian analysis finds individual QNM frequencies near avoided crossings hard to resolve even under optimistic conditions, though collective AC waveform signatures may remain detectable if those modes dominate and slower-mode contamination is minimal.","context_count":0,"top_context_role":null,"top_context_polarity":null,"context_text":null},{"citing_arxiv_id":"2605.03576","ref_index":83,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Ringdown Analysis of GW250114 with Orthonormal Modes","primary_cat":"gr-qc","submitted_at":"2026-05-05T09:45:08+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":5.0,"formal_verification":"none","one_line_summary":"Orthonormal QNM analysis of GW250114 raises the significance of the first overtone of the ℓ=m=2 mode from 82.5% to 99.9% and detects no significant deviation from Kerr predictions.","context_count":1,"top_context_role":"dataset","top_context_polarity":"use_dataset","context_text":"[76], which is analytically marginalized over the coefficients{˜c j,ℓmn}. We then perform Bayesian inference on the parameters (Mf , χf , δf221, δγ221) based on this likelihood. B. Setup For the complex frequencies ˜ωℓmn used in the signal model for parameter inference, we adopt those of Kerr QNMs. We compute them by interpolating the tabulated results of Refs. [83, 84], which provide precise calculations of the complex frequencies at discrete spin values. We follow the choice of reference parameters in Ref. [15]. Specifically, we adopt the reference peak timet peak = 1420878141.235932 s (GPS) at geocen- ter, the reference remnant massM f = 68.409M ⊙, the source right ascensionα= 2.333 rad, declinationδ= 0.190 rad, and polarization angleψ= 0."},{"citing_arxiv_id":"2605.03277","ref_index":15,"ref_count":2,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Quasinormal modes and continuum response of de Sitter black holes via complex scaling method","primary_cat":"hep-th","submitted_at":"2026-05-05T02:09:06+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":5.0,"formal_verification":"none","one_line_summary":"Complex scaling unifies quasinormal modes and continuum response for black-hole perturbations in four-dimensional Schwarzschild-de Sitter spacetimes.","context_count":1,"top_context_role":"background","top_context_polarity":"unclear","context_text":"11478 [gr-qc]. [13] T. Miyachi, R. Namba, H. Omiya, and N. Oshita, \"Path to an exact WKB analysis of black hole quasinormal modes,\"Phys. Rev. D111no. 12, (2025) 124045,arXiv:2503.17245 [hep-th]. [14] A. M. Pombo and L. Pizzuti, \"Teukolsky by design: A hybrid spectral-PINN solver for Kerr quasinormal modes,\"JCAP03(2026) 009,arXiv:2511.15796 [gr-qc]. [15] H. Motohashi, \"Resonant Excitation of Quasinormal Modes of Black Holes,\"Phys. Rev. Lett.134no. 14, (2025) 141401,arXiv:2407.15191 [gr-qc]. [16] R. Panosso Macedo, T. Katagiri, K.-i. Kubota, and H. Motohashi, \"Exceptional Points and Resonance in Black Hole Ringdown,\"arXiv:2512.02110 [gr-qc]. [17] T. Takahashi, H. Motohashi, and K. Takahashi, \"Resonance of black hole quasinormal modes in coupled"},{"citing_arxiv_id":"2605.01964","ref_index":41,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Pole Structure of Kerr Green's Function","primary_cat":"gr-qc","submitted_at":"2026-05-03T16:51:02+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":6.0,"formal_verification":"none","one_line_summary":"Homogeneous solutions and connection coefficients in the radial Teukolsky equation for Kerr black holes exhibit simple poles at Matsubara frequencies that cancel in the Green's function, along with canceling zero-frequency singularities scaling as ω^{-2l-1}.","context_count":1,"top_context_role":"background","top_context_polarity":"background","context_text":"Hortacsu, \"Heun Functions and Some of Their Ap- plications in Physics,\" Adv. High Energy Phys.2018, 8621573 (2018), arXiv:1101.0471 [math-ph]. [40] H. S. Vieira and V. B. Bezerra, \"Confluent Heun func- tions and the physics of black holes: Resonant frequen- cies, Hawking radiation and scattering of scalar waves,\" Annals Phys.373, 28-42 (2016), arXiv:1603.02233 [gr- qc]. [41] Plamen P. Fiziev, \"Classes of Exact Solutions to the Teukolsky Master Equation,\" Class. Quant. Grav.27, 135001 (2010), arXiv:0908.4234 [gr-qc]. [42] Bruno Carneiro da Cunha and Jo˜ ao Paulo Caval- cante, \"Confluent conformal blocks and the Teukolsky master equation,\" Phys. Rev. D102, 105013 (2020), arXiv:1906.10638 [hep-th]. [43] Giulio Bonelli, Cristoforo Iossa, Daniel Panea Lichtig,"},{"citing_arxiv_id":"2604.20442","ref_index":17,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Complex scaling approach to quasinormal modes of Schwarzschild and Reissner--Nordstr\\\"om black holes","primary_cat":"hep-th","submitted_at":"2026-04-22T11:05:11+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":5.0,"formal_verification":"none","one_line_summary":"Complex scaling converts outgoing boundary conditions into eigenvalue problems to compute quasinormal frequencies for Schwarzschild and Reissner-Nordström black holes, including the extremal limit.","context_count":1,"top_context_role":"background","top_context_polarity":"background","context_text":"11478 [gr-qc]. [15] T. Miyachi, R. Namba, H. Omiya, and N. Oshita, \"Path to an exact WKB analysis of black hole quasinormal 42 modes,\"Phys. Rev. D111no. 12, (2025) 124045,arXiv:2503.17245 [hep-th]. [16] A. M. Pombo and L. Pizzuti, \"Teukolsky by design: A hybrid spectral-PINN solver for Kerr quasinormal modes,\"JCAP03(2026) 009,arXiv:2511.15796 [gr-qc]. [17] H. Motohashi, \"Resonant Excitation of Quasinormal Modes of Black Holes,\"Phys. Rev. Lett.134no. 14, (2025) 141401,arXiv:2407.15191 [gr-qc]. [18] R. Panosso Macedo, T. Katagiri, K.-i. Kubota, and H. Motohashi, \"Exceptional Points and Resonance in Black Hole Ringdown,\"arXiv:2512.02110 [gr-qc]. [19] T. Takahashi, H. Motohashi, and K. Takahashi, \"Resonance of black hole quasinormal modes in coupled"},{"citing_arxiv_id":"2604.13208","ref_index":83,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Axial Oscillations of Viscous Neutron Stars","primary_cat":"gr-qc","submitted_at":"2026-04-14T18:30:45+00:00","verdict":null,"verdict_confidence":null,"novelty_score":null,"formal_verification":null,"one_line_summary":null,"context_count":1,"top_context_role":"background","top_context_polarity":"background","context_text":"13072 [gr-qc]. [80] Hayato Motohashi, \"Resonant Excitation of Quasinor- mal Modes of Black Holes,\" Phys. Rev. Lett.134, 141401 (2025), arXiv:2407.15191 [gr-qc]. [81] Jahed Abediet al., \"Black hole spectroscopy: from the- ory to experiment,\" (2025), arXiv:2505.23895 [gr-qc]. [82] HansA.Buchdahl,\"GeneralRelativisticFluidSpheres,\" Phys. Rev.116, 1027 (1959). [83] Gabriele Benomio, Alejandro Cárdenas-Avendaño, Frans Pretorius, and Andrew Sullivan, \"On turbu- lence for spacetimes with stable trapping,\" (2024), arXiv:2411.17445 [gr-qc]. [84] Jaime Redondo-Yuste and Alejandro Cárdenas- Avendaño, \"Perturbative and non-linear analyses of gravitational turbulence in spacetimes with stable light rings,\" (2025), arXiv:2502."},{"citing_arxiv_id":"2604.03985","ref_index":30,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Autoencoder-Based Parameter Estimation for Superposed Multi-Component Damped Sinusoidal Signals","primary_cat":"cs.LG","submitted_at":"2026-04-05T06:12:12+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":5.0,"formal_verification":"none","one_line_summary":"Autoencoder uses latent space to estimate parameters of multi-component damped sinusoids in noise with high accuracy even for weak or opposing-phase components.","context_count":1,"top_context_role":"background","top_context_polarity":"background","context_text":"028±0.022 0.033±0.026 1 0.004±0.005 0.032±0.027 0.023±0.018 0.027±0.022 naturally in physical systems. The present results therefore suggest that autoencoder-based pa- rameter estimation may provide a useful tool for investigating the physics behind such signals, including possible future applications to resonant phenomena in damped oscillation systems [30]. The present results also reveal several limitations of the method. The estimation accuracy is not uniform over the entire parameter space, and some degradation is observed near the edges of the parameter distributions used for training. In the five-component case, a reduction in the match score was found in the high-frequency tail, suggesting that the performance is affected"},{"citing_arxiv_id":"2512.22728","ref_index":70,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Probing higher curvature gravity via ringdown with overtones","primary_cat":"gr-qc","submitted_at":"2025-12-27T23:59:41+00:00","verdict":"CONDITIONAL","verdict_confidence":"MODERATE","novelty_score":6.0,"formal_verification":"none","one_line_summary":"Higher-curvature terms deform the near-horizon potential of spherically symmetric black holes, producing progressively larger shifts in overtone quasinormal frequencies that remain detectable in ringdown waveforms when the fundamental mode stays close to its GR value.","context_count":0,"top_context_role":null,"top_context_polarity":null,"context_text":null},{"citing_arxiv_id":"2512.02110","ref_index":19,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Exceptional Points and Resonance in Black Hole Ringdown","primary_cat":"gr-qc","submitted_at":"2025-12-01T19:00:01+00:00","verdict":"CONDITIONAL","verdict_confidence":"LOW","novelty_score":7.0,"formal_verification":"none","one_line_summary":"An exceptional-point framework for black-hole ringdown characterizes resonances near avoided crossings, demonstrates enhanced mode contributions in the time domain, and identifies the EP frequency as the physically relevant observable.","context_count":0,"top_context_role":null,"top_context_polarity":null,"context_text":null},{"citing_arxiv_id":"2505.23895","ref_index":147,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Black hole spectroscopy: from theory to experiment","primary_cat":"gr-qc","submitted_at":"2025-05-29T18:00:01+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":2.0,"formal_verification":"none","one_line_summary":"A review summarizing the state of the art in black hole quasinormal modes, ringdown waveform modeling, current LIGO-Virgo-KAGRA observations, and prospects for LISA and next-generation detectors.","context_count":1,"top_context_role":"background","top_context_polarity":"support","context_text":"occur in BH backgrounds described by two or more dimensionless parameters. However, they can occur even when the BH background is parameterized by a single parameter. In this context, certain peculiar features of the Kerr QNM spectrum (e.g. the behavior of the fifth radial overtone of theℓ = m = 2 gravitational QNM [47]) are ultimately due to the phenomenon of eigenvalue repulsion [147]. This will be reviewed and discussed in detail in Section 2.3 below. Note that symmetries might induce \"accidental\" (and thus exceptional) eigenvalue crossings even when the BH background is parameterized by a single parameter, e.g. for KerrBHs(seeSection4of[96]andSection4.1of[126]). Indeed, thenearhorizongeometry of extremal BHs has an emergent SL(2, R) isometry, responsible for the clustering of"}],"limit":50,"offset":0}