Could the black hole singularity be a field singularity?

doi:10.1142/S0218271820500261

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	Could the black hole singularity be a field singularity?
	Domenech, Guillem ; Naruko, Atsushi 1,6,7; Sasaki, Misao 2,3,4,6; Wetterich, Christof
刊名	INTERNATIONAL JOURNAL OF MODERN PHYSICS D
	2020
卷号	29 期号:3 页码:2050026
关键词	GRAVITATIONAL COLLAPSE MODIFIED GRAVITY SCALAR FIELDS INFLATION COSMOLOGY UNIVERSE ENERGY ORIGIN
ISSN号	0218-2718
DOI	10.1142/S0218271820500261
英文摘要	In the wake of interest to find black hole solutions with scalar hair, we investigate the effects of disformal transformations on static spherically symmetric spacetimes with a nontrivial scalar field. In particular, we study solutions that have a singularity in a given frame, while the action is regular. We ask if there exists a different choice of field variables such that the geometry and the fields are regular. We find that in some cases disformal transformations can remove a singularity from the geometry or introduce a new horizon. This is possible since the Weyl tensor is not invariant under a general disformal transformation. There exists a class of metrics which can be brought to Minkowksi geometry by a disformal transformation, which may be called disformally flat metrics. We investigate three concrete examples from massless scalar fields to Horndeski theory for which the singularity can be removed from the geometry. This might indicate that no physical singularity is present. We also propose a disformal invariant tensor.
学科主题	Astronomy & Astrophysics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/26951]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.Tohoku Univ, Frontier Res Inst Interdisciplinary Sci, Sendai, Miyagi 9808578, Japan 2.Kavli Inst Phys & Math Universe WPI, Chiba 2778583, Japan 3.Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan 4.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China 5.Natl Taiwan Univ, Leung Ctr Cosmol & Particle Astrophys, Taipei 10617, Taiwan 6.Heidelberg Univ, Inst Theoret Phys, Philosophenweg 16, D-69120 Heidelberg, Germany 7.Kyoto Univ, Ctr Gravitat Phys, Yukawa Inst Theoret Phys, Kyoto 6068502, Japan
推荐引用方式 GB/T 7714	Domenech, Guillem,Naruko, Atsushi,Sasaki, Misao,et al. Could the black hole singularity be a field singularity?[J]. INTERNATIONAL JOURNAL OF MODERN PHYSICS D,2020,29(3):2050026.
APA	Domenech, Guillem,Naruko, Atsushi,Sasaki, Misao,&Wetterich, Christof.(2020).Could the black hole singularity be a field singularity?.INTERNATIONAL JOURNAL OF MODERN PHYSICS D,29(3),2050026.
MLA	Domenech, Guillem,et al."Could the black hole singularity be a field singularity?".INTERNATIONAL JOURNAL OF MODERN PHYSICS D 29.3(2020):2050026.