Quantizing a Probe Scalar Field in BTZ Black Hole Geometry with a Dirichlet Boundary Condition Near the Horizon
This paper explores the implications of quantizing a probe scalar field in a BTZ black hole background with a Dirichlet boundary condition (a "brick wall") placed close to the event horizon, arguing that this simplified model captures key features of fuzzball geometries and offers insights into the emergence of thermal physics from a microscopic description.
Nonlinear Scalar Field Instability on Highly Charged Anti-de Sitter Black Hole Backgrounds: Exploring the Impact of Charge and Boundary Conditions
The stability of a nonlinear scalar field on a charged black hole background in anti-de Sitter spacetime is highly sensitive to the black hole's charge and the chosen boundary conditions. For charges exceeding a critical value, a transition to unstable behavior occurs, leading to either convergence to a non-trivial static solution (defocusing case) or finite-time blow-up (focusing case), regardless of the boundary condition.
블랙홀 링다운 안정성: 안정적인 중력파 관측 가능량으로서의 그레이바디 인자
블랙홀의 고유 진동 모드인 준정규 모드(QNM) 스펙트럼은 시스템의 작은 변형에도 매우 민감하지만, 그레이바디 인자는 안정적인 것으로 나타나 블랙홀 링다운 연구에 대한 상호 보완적인 접근 방식을 제시합니다.
The Stability of Black Hole Greybody Factors Under Perturbations and Their Role as Reliable Gravitational-Wave Observables
While black hole quasinormal modes (QNMs) are susceptible to instabilities under perturbations, greybody factors (GFs), which describe the spectral amplitude of ringdown signals, remain stable and offer a reliable alternative for studying black holes and gravitational waves.
Quantum Mechanical Description of Black Hole Formation from a Charged Dust Ball
By quantizing the motion of dust particles in a collapsing dust ball with a charged core, the study demonstrates that the resulting black hole model eliminates the central singularity and the inner Cauchy horizon, suggesting a more stable and physically plausible endpoint for gravitational collapse.
Refining the Membrane Paradigm for Black Hole Horizons: A Hydrodynamic Perspective on the Schwarzschild and Kerr Solutions
This paper refines the Parikh-Wilczek Membrane Approach to black holes, demonstrating that while the null-hypersurface limit introduces additional terms to the hydrodynamic equations, these terms vanish for the Schwarzschild and Kerr solutions, upholding the standard form of the Raychaudhuri and Damour-Navier-Stokes equations.
Quasinormal Modes of Rotating Black Holes and New Solitons in 5D Einstein-Gauss-Bonnet Gravity at the Chern-Simons Point
This research paper presents new exact solutions for rotating black holes and static solitons in five-dimensional Einstein-Gauss-Bonnet gravity at the Chern-Simons point, analyzes the behavior of massless scalar probes on these backgrounds, and explores the impact of non-vanishing torsion.
Stability Analysis of the Greybody Factor for Hayward Black Holes under Potential Perturbations
The greybody factor of a Hayward black hole, representing its absorptive nature, exhibits stability under small perturbations to its effective potential, as demonstrated by analyzing the impact of a Pöschl-Teller bump using both equal amplitude and equal energy methods.
Exceptional Point and Hysteresis in Perturbations of Near-Extremal Kerr Black Holes: A Thermodynamic Analogy
This study reveals the existence of an exceptional point and hysteresis in the evolution of quasinormal modes (QNMs) for massive scalar fields around near-extremal Kerr black holes, drawing a compelling analogy to phase transitions in thermodynamic systems.
블랙홀 링다운에서의 비선형 효과: 단열 모드로서의 준정규 모드
본 논문은 블랙홀 링다운 과정에서 발생하는 준정규 모드의 비선형 효과를 펜로즈 극한을 통해 단열 모드로 해석하여 설명하고, 이를 통해 슈바르츠실트 및 커 블랙홀의 비선형성을 간단하게 계산하는 방법을 제시합니다.
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