scholarly journals Higher dimensional self-similar spherical symmetric scalar field collapse and critical phenomena in black-hole formation

1996 ◽  
Vol 387 (2) ◽  
pp. 271-277 ◽  
Author(s):  
Jiro Soda ◽  
Kouichirou Hirata
Keyword(s):  
Black Hole ◽  
Scalar Field ◽  
Critical Phenomena ◽  
Hole Formation ◽  
Black Hole Formation ◽  
Higher Dimensional ◽  
Self Similar

Disappearance of Black Hole Criticality in Semiclassical General Relativity

1997 ◽  
Vol 12 (10) ◽  
pp. 709-718 ◽  
Author(s):  
Takeshi Chiba ◽  
Masaru Siino
Keyword(s):  
General Relativity ◽  
Black Hole ◽  
Scalar Field ◽  
Critical Phenomena ◽  
Equations Of Motion ◽  
Quantum Effects ◽  
Hole Formation ◽  
Trace Anomaly ◽  
Self Similar ◽  
Similar Solutions

We investigate the quantum effects on the so-called critical phenomena in black hole formation. Quantum effects of a scalar field are treated semiclassically via a trace anomaly method. It is found that the demand of regularity at the origin implies the disappearance of the echo. It is also found that semiclassical equations of motion do not admit continuously self-similar solutions. The quantum effects would change the critical solution from a discretely self-similar one to a solution without critical phenomena.

scholarly journals Analytic description of primordial black hole formation from scalar field fragmentation

2019 ◽  
Vol 2019 (10) ◽  
pp. 077-077 ◽  
Author(s):  
Eric Cotner ◽  
Alexander Kusenko ◽  
Misao Sasaki ◽  
Volodymyr Takhistov
Keyword(s):  
Black Hole ◽  
Scalar Field ◽  
Analytic Description ◽  
Primordial Black Hole ◽  
Hole Formation ◽  
Black Hole Formation

scholarly journals Strength of the naked singularity in critical collapse

2020 ◽  
Vol 80 (10) ◽  
Author(s):  
Jun-Qi Guo ◽  
Lin Zhang ◽  
Yuewen Chen ◽  
Pankaj S. Joshi ◽  
Hongsheng Zhang
Keyword(s):  
Black Hole ◽  
Scalar Field ◽  
Naked Singularity ◽  
Fine Tuning ◽  
Hole Formation ◽  
Black Hole Formation ◽  
Physical Objects ◽  
Volume Forms

AbstractThe critical collapse of a scalar field is a threshold solution of black hole formation, in which a naked singularity arises. We study here the curvature strength of this singularity using a numerical ansatz. The behavior of the Jacobi volume forms is examined along a non-spacelike geodesic in the limit of approach to the singularity. These are seen to be vanishing, thus showing that all physical objects will be crushed to zero size near the singularity. Consequently, although the critical collapse is considered to be a fine-tuning problem, the naked singularity forming is gravitationally strong. This implies that the spacetime cannot be extended beyond the singularity, thus making the singularity genuine and physically interesting. These results imply that the nature of critical collapse may need to be examined and explored further.

scholarly journals A (gravitational) toy story

2017 ◽  
Vol 26 (09) ◽  
pp. 1750096
Author(s):  
W. Barreto ◽  
H. P. de Oliveira ◽  
B. Rodriguez-Mueller
Keyword(s):  
Black Hole ◽  
Scalar Field ◽  
Critical Exponent ◽  
Critical Behavior ◽  
Massless Scalar ◽  
Massless Scalar Field ◽  
De Sitter ◽  
Hole Formation ◽  
Black Hole Formation ◽  
Mass Gap

Frequently in Physics, insights and conclusions can be drawn from simple, idealized models. The discovery of critical behavior in the gravitational collapse of a massless scalar field leads to the simulation of binary black holes, from its coalescence to merging and ringdown. We refined a toy model to explore black hole formation as these events unfold to revisit the instability of a gravitational kink. We confirmed a conjecture related to a mass gap for critical behavior at the threshold of black hole formation. We find a critical exponent twice the standard value. Surprisingly, this larger critical exponent is also present in the multiple critical behavior for the black hole formation from a massless scalar field in asymptotically anti-de Sitter spacetimes. What is the meaning of this mass gap? Does it have physical relevance?

scholarly journals Exact black-hole formation with a conformally coupled scalar field in three dimensions

2018 ◽  
Vol 35 (24) ◽  
pp. 245001 ◽  
Author(s):  
Luis Avilés ◽  
Hideki Maeda ◽  
Cristián Martínez
Keyword(s):  
Black Hole ◽  
Scalar Field ◽  
Three Dimensions ◽  
Hole Formation ◽  
Black Hole Formation

scholarly journals Wave functions for quantum black hole formation in scalar field collapse

2000 ◽  
Vol 61 (4) ◽  
Author(s):  
Dongsu Bak ◽  
Sang Pyo Kim ◽  
Sung Ku Kim ◽  
Kwang-Sup Soh ◽  
Jae Hyung Yee
Keyword(s):  
Black Hole ◽  
Scalar Field ◽  
Wave Functions ◽  
Hole Formation ◽  
Quantum Black Hole ◽  
Black Hole Formation
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