General Relativity and Gravitation最新文献_第5页

Plebanśki–Demiański à la Ehlers–Harrison: exact rotating and accelerating type I black holes 埃勒斯-哈里森的普莱班斯基-德米亚斯基：精确旋转和加速的 I 型黑洞

IF 2.1 4区物理与天体物理

General Relativity and Gravitation Pub Date : 2024-09-24 DOI: 10.1007/s10714-024-03304-x

José Barrientos, Adolfo Cisterna, Konstantinos Pallikaris

{"title":"Plebanśki–Demiański à la Ehlers–Harrison: exact rotating and accelerating type I black holes","authors":"José Barrientos, Adolfo Cisterna, Konstantinos Pallikaris","doi":"10.1007/s10714-024-03304-x","DOIUrl":"10.1007/s10714-024-03304-x","url":null,"abstract":"<div><p>Recently, it was shown that type D black holes, encompassed in the large Plebanśki–Demiański (PD) family, exhibit a wide class of algebraically general generalizations via the application of Ehlers and Harrison transformations. In this work, we first discuss some mathematical details behind the composition of such transformations, and next, we introduce a qualitative picture of the most general type I generalization of the PD family, dubbed “Enhanced Plebanśki–Demiański” spacetime. We provide the exact form of the solution in the original PD coordinates, obtained via the simultaneous action of an Ehlers and a Harrison transformation on the vacuum PD geometry. In order to make the physics more transparent, we explicitly construct a rotating and accelerating black hole which further has NUT parameter and electric charges, both of them entering, not only the event horizon, but the Rindler horizon as well. This solution is directly obtained in the “physical” coordinates recently proposed by Podolský and Vrátny. Finally, a pedagogical appendix is thoughtfully included, providing readers with a user-friendly step-by-step guide to the Ernst formalism, in an attempt to address and resolve various minor inconsistencies frequently appearing in the relevant literature.</p></div>","PeriodicalId":578,"journal":{"name":"General Relativity and Gravitation","volume":"56 9","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142317253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Spontaneous symmetry breaking as a result of extra dimensions compactification 额外维度压缩导致的自发对称破缺

IF 2.1 4区物理与天体物理

General Relativity and Gravitation Pub Date : 2024-09-23 DOI: 10.1007/s10714-024-03301-0

Dmitry Chirkov, Alex Giacomini, Alexey Toporensky, Petr Tretyakov

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Microscopic origin of black hole entropy from tachyon condensation 从超速子凝聚看黑洞熵的微观起源

IF 2.1 4区物理与天体物理

General Relativity and Gravitation Pub Date : 2024-09-20 DOI: 10.1007/s10714-024-03299-5

Huiquan Li

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Landauer’s principle and black hole area quantization 兰道尔原理与黑洞面积量子化

IF 2.1 4区物理与天体物理

General Relativity and Gravitation Pub Date : 2024-09-18 DOI: 10.1007/s10714-024-03296-8

Bijan Bagchi, Aritra Ghosh, Sauvik Sen

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Mini boson stars in higher dimensions are radially unstable 更高维的迷你玻色子星在径向上不稳定

IF 2.1 4区物理与天体物理

General Relativity and Gravitation Pub Date : 2024-09-16 DOI: 10.1007/s10714-024-03287-9

Edgardo Franzin

引用次数: 0

Sub-annular structure in black hole image from gravitational refraction 来自引力折射的黑洞图像中的亚环状结构

IF 2.1 4区物理与天体物理

General Relativity and Gravitation Pub Date : 2024-09-16 DOI: 10.1007/s10714-024-03297-7

Gaston Giribet, Emilio Rubín de Celis, Pedro Schmied

{"title":"Sub-annular structure in black hole image from gravitational refraction","authors":"Gaston Giribet, Emilio Rubín de Celis, Pedro Schmied","doi":"10.1007/s10714-024-03297-7","DOIUrl":"10.1007/s10714-024-03297-7","url":null,"abstract":"<div><p>The images of supermassive black holes captured by the Event Horizon Telescope (EHT) collaboration have allowed us to have access to the physical processes that occur in the vicinity of the event horizons of these objects. Furthermore, black hole imaging gives rise to a new way of testing general relativity in the strong field regime. This has initiated a line of research aimed at probing different physical scenarios. While many scenarios have been proposed in the literature that yield distortion effects that would be a priori detectable at the resolution achieved by future EHT observations, the vast majority of those scenarios involve strange objects or exotic matter content. Here, we consider a less heterodox scenario which, involving non-exotic matter, in the sense that it satisfies all energy conditions and is dynamically stable, also leads to a deformation of the black hole shadow. We consider a specific concentration of non-emitting, relativistic matter of zero optical depth forming a bubble around the black hole. Due to gravitational refraction, such a self-interacting—dark—matter concentration may produce sub-annular images, i.e. subleading images inside the photon ring. We calculate the ray tracing in the space-time geometry produced by such a matter configuration and obtain the corresponding black hole images. While for concreteness we restrict our analysis to a specific matter distribution, modeling the bubble as a thin-shell, effects qualitatively similar to those described here are expected to occur for more general density profiles.</p></div>","PeriodicalId":578,"journal":{"name":"General Relativity and Gravitation","volume":"56 9","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142234102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cosmic strings and gravitational waves 宇宙弦和引力波

IF 2.1 4区物理与天体物理

General Relativity and Gravitation Pub Date : 2024-09-14 DOI: 10.1007/s10714-024-03293-x

Lara Sousa

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Critical gravitational inspiral of two massless particles 两个无质量粒子的临界引力吸积

IF 2.1 4区物理与天体物理

General Relativity and Gravitation Pub Date : 2024-09-14 DOI: 10.1007/s10714-024-03282-0

Don N. Page

{"title":"Critical gravitational inspiral of two massless particles","authors":"Don N. Page","doi":"10.1007/s10714-024-03282-0","DOIUrl":"10.1007/s10714-024-03282-0","url":null,"abstract":"<div><p>If two ultrarelativistic nonrotating black holes of masses <span>(m_1)</span> and <span>(m_2)</span> approach each other with fixed center-of-momentum (COM) total energy <span>(E = sqrt{s} gg (m_1+m_2)c^2)</span> that has a corresponding Schwarzschild radius <span>(R = 2GE/c^4)</span> much larger than the Schwarzschild radii of the individual black holes, here it is conjectured that at the critical impact parameter <span>(b_c)</span> between scattering and coalescing into a single black hole, there will be an inspiral of many orbital rotations for <span>(m_1c^2/E ll 1)</span> and <span>(m_2c^2/E ll 1)</span> before a final black hole forms, during which all of the initial kinetic energy will be radiated away in gravitational waves by the time the individual black holes coalesce and settle down to a stationary state. In the massless limit <span>(m_1 = m_2 = 0)</span>, in which the black holes are replaced by classical massless point particles, it is conjectured that for the critical impact parameter, all of the total energy will be radiated away by the time the two particle worldlines merge and end. One might also conjecture that in the limit of starting with the massless particles having infinite energy in the infinite past with the correct ratio of impact parameter to energy, the spacetime for retarded time before the final worldline merger at zero energy will have a homothetic vector field and hence be self similar. Evidence against these conjectures is also discussed, and if it proves correct, I conjecture that two massless particles can form any number of black holes.</p></div>","PeriodicalId":578,"journal":{"name":"General Relativity and Gravitation","volume":"56 9","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142231471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Topological dressing method for the Einstein–Maxwell equations 爱因斯坦-麦克斯韦方程的拓扑敷料法

IF 2.1 4区物理与天体物理

General Relativity and Gravitation Pub Date : 2024-09-13 DOI: 10.1007/s10714-024-03288-8

Juri Dimaschko

引用次数: 0

Extended uncertainty principle via Dirac quantization 通过狄拉克量子化扩展不确定性原理

IF 2.1 4区物理与天体物理

General Relativity and Gravitation Pub Date : 2024-09-09 DOI: 10.1007/s10714-024-03292-y

Mytraya Gattu, S. Shankaranarayanan

{"title":"Extended uncertainty principle via Dirac quantization","authors":"Mytraya Gattu, S. Shankaranarayanan","doi":"10.1007/s10714-024-03292-y","DOIUrl":"10.1007/s10714-024-03292-y","url":null,"abstract":"<div><p>Unifying quantum theory and gravity remains a fundamental challenge in physics. While most existing literature focuses on the ultraviolet modifications of quantum theory due to gravity, this work shows that generic infrared modifications arise when we describe quantum theory in curved spacetime. We explicitly demonstrate that the modifications to the position-momentum algebra are proportional to curvature invariants (such as the Ricci scalar and Kretschmann scalar). Our results, derived through a rigorous application of Dirac’s quantization procedure, demonstrate that infrared effects in quantum systems can be axiomatically derived. We study particle dynamics in an arbitrary curved spacetime by embedding them in a higher-dimensional flat geometry. Our approach, which involves embedding particle dynamics in a higher-dimensional flat geometry and utilizing Dirac’s quantization procedure, allows us to capture the dynamics of a particle in 4-dimensional curved spacetime through a modified position-momentum algebra. When applied to various spacetimes, this method reveals that the corrections due to the spacetime curvature are universal. We further compare our results with those derived using extended uncertainty principles. Finally, we discuss the implications of our work for black holes and entanglement.</p></div>","PeriodicalId":578,"journal":{"name":"General Relativity and Gravitation","volume":"56 9","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142160703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0