General Relativity and Gravitation最新文献_第10页

Quantum entanglement as a (mathcal{P}mathcal{T})-symmetric identification in a bimetric spacetime Quantum entanglement as a PTdocumentclass[12pt]{minimal} usepackage{amsmath} usepackage{wasysym} usepackage{amsfonts} usepackage{amssymb} usepackage{amsbsy} usepackage{mathrsfs} usepackage{upgreek} setlength{oddsidemargin}{-69pt} begin{document}$$mathcal{P}mathcal{T}$$end{document}-symmetric identification in a bimetric spacetime

IF 2.8 4区物理与天体物理

General Relativity and Gravitation Pub Date : 2026-03-23 DOI: 10.1007/s10714-026-03529-y

Hicham Zejli

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引用次数: 0

Thermodynamic topology and photon spheres analysis of black holes in brane-world: insights from Barrow entropy 膜世界中黑洞的热力学拓扑和光子球分析：来自巴罗熵的见解

IF 2.8 4区物理与天体物理

General Relativity and Gravitation Pub Date : 2026-03-22 DOI: 10.1007/s10714-026-03534-1

Usman Zafar, Abdul Jawad, Kazuharu Bamba, Mohammad Ali S. Afshar, Mohammad Reza Alipour, Saeed Noori Gashti, Jafar Sadeghi

{"title":"Thermodynamic topology and photon spheres analysis of black holes in brane-world: insights from Barrow entropy","authors":"Usman Zafar, Abdul Jawad, Kazuharu Bamba, Mohammad Ali S. Afshar, Mohammad Reza Alipour, Saeed Noori Gashti, Jafar Sadeghi","doi":"10.1007/s10714-026-03534-1","DOIUrl":"10.1007/s10714-026-03534-1","url":null,"abstract":"<div>We explore the thermodynamics and geothermodynamics of black holes with the Barrow entropy in a brane-world scenario, where the horizon geometry of the black hole is regarded as a fractal structure. Our analysis reveals the behavior of heat capacity, identifying both bound and divergence points. For the Bekenstein-Hawking entropy, the divergence point exhibits smooth behavior, indicating no phase transition. In contrast, we observe divergence with Barrow entropy as the deformation parameter increases, confirming the presence of a zero point in heat capacity through various thermodynamic geometry formalisms. Additionally, we delve into thermodynamic topology, detailing the classification of black holes in the brane-world context and comparing their characteristics determined from the Bekenstein-Hawking and the Barrow entropy. Notably, fixing the deformation and cosmological parameters results in a topological charge (-1) predominately by the dark matter parameter, which remains unaffected despite variations in other parameters. In the dS model, the cosmological horizon prevents stable photon spheres, making topological charges of 0 and (+1) unattainable. Incremental increases in the cosmological parameter reduce the dark matter parameter-dominated region.</div>","PeriodicalId":578,"journal":{"name":"General Relativity and Gravitation","volume":"58 3","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10714-026-03534-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147507938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Geometric origin of a stable black hole remnant from torsion in G(_2)-manifold geometry Geometric origin of a stable black hole remnant from torsion in G2documentclass[12pt]{minimal} usepackage{amsmath} usepackage{wasysym} usepackage{amsfonts} usepackage{amssymb} usepackage{amsbsy} usepackage{mathrsfs} usepackage{upgreek} setlength{oddsidemargin}{-69pt} begin{document}$$_2$$end{document}-manifold geometry

IF 2.8 4区物理与天体物理

General Relativity and Gravitation Pub Date : 2026-03-19 DOI: 10.1007/s10714-026-03528-z

Richard Pinčák, Alexander Pigazzini, Michal Pudlák, Erik Bartoš

{"title":"Geometric origin of a stable black hole remnant from torsion in G(_2)-manifold geometry","authors":"Richard Pinčák, Alexander Pigazzini, Michal Pudlák, Erik Bartoš","doi":"10.1007/s10714-026-03528-z","DOIUrl":"10.1007/s10714-026-03528-z","url":null,"abstract":"<div>In this work, we explore the phenomenological consequences of a 7-dimensional Einstein-Cartan theory formulated on a G(_2)-manifold with torsion. We demonstrate that a Kaluza-Klein reduction of this geometry can provide a natural origin for the electroweak scale ((approx thickapprox {246}{GeV})), offering a geometric explanation for the hierarchy problem. A key prediction of this framework is the existence of a repulsive force at Planckian densities, which dynamically halts the final stage of Hawking evaporation. This leads to the formation of a stable remnant with a predicted mass of approximately (9times 10^{-41};text {kg}). The model’s internal consistency is confirmed by non-trivial relations that fix its geometric parameters, leading to falsifiable predictions. Furthermore, the remnant’s structure provides a concrete mechanism for storing information via its quasi-normal mode spectrum, opening a new, testable research program at the intersection of geometry, quantum gravity, and particle physics.</div>","PeriodicalId":578,"journal":{"name":"General Relativity and Gravitation","volume":"58 3","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10714-026-03528-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147507939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Gravitational waves in massive Horndeski theory with a potential 大质量霍恩德斯基理论中的引力波具有势

IF 2.8 4区物理与天体物理

General Relativity and Gravitation Pub Date : 2026-03-13 DOI: 10.1007/s10714-026-03533-2

Hatice Özer, Özgür Delice

{"title":"Gravitational waves in massive Horndeski theory with a potential","authors":"Hatice Özer, Özgür Delice","doi":"10.1007/s10714-026-03533-2","DOIUrl":"10.1007/s10714-026-03533-2","url":null,"abstract":"<div>We investigate gravitational waves with an arbitrary potential within the framework of linearized Horndeski theory. We show that the minimum of the potential can play the role of an effective cosmological constant in this theory, which is usually neglected in previous studies of this subject. We first determine the background geometry in this setup by solving the weak field scalar and tensorial equations of linearized Horndeski theory. The solutions of linearized weak-field wave equations, in an appropriate gauge, are then obtained perturbatively to study the propagation and interactions of gravitational waves in this background. We compare our results with different realizations of the cosmological constant in Horndeski theory to compare the role of an arbitrary scalar potential with those of vacuum energy density and a linear potential. The results show that the background curvature arising from the minimum of the scalar potential effectively mimics a cosmological constant, producing distinct redshifts in the frequency and wave number that distinguish the tensor waves from massive scalar ones. We also find that the way the cosmological constant is introduced directly influences the speed and polarization of the scalar wave.</div>","PeriodicalId":578,"journal":{"name":"General Relativity and Gravitation","volume":"58 3","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10714-026-03533-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147441891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Hamiltonian constraint in the symmetric teleparallel equivalent of general relativity 广义相对论的对称远平行等效中的哈密顿约束

IF 2.8 4区物理与天体物理

General Relativity and Gravitation Pub Date : 2026-03-13 DOI: 10.1007/s10714-026-03535-0

María-José Guzmán

引用次数: 0

Shadow structure of generalized (k-n) black-bounce metrics 广义(k-n)黑弹度量的阴影结构

IF 2.8 4区物理与天体物理

General Relativity and Gravitation Pub Date : 2026-03-06 DOI: 10.1007/s10714-026-03524-3

Jose R. Nascimento, Ana R. M. Oliveira, Albert Yu. Petrov, Paulo J. Porfírio, Amilcar R. Queiroz

{"title":"Shadow structure of generalized (k-n) black-bounce metrics","authors":"Jose R. Nascimento, Ana R. M. Oliveira, Albert Yu. Petrov, Paulo J. Porfírio, Amilcar R. Queiroz","doi":"10.1007/s10714-026-03524-3","DOIUrl":"10.1007/s10714-026-03524-3","url":null,"abstract":"<div>The existence of black hole shadows is one of the most interesting effects of the strong field regime of general relativity (GR). Recent observations by the Event Horizon Telescope (EHT) have provided high-resolution images of the vicinity of supermassive black holes, ushering in a new era for testing gravitation on astrophysical scales. In this work, we continue the investigation initiated by [1], focusing on shadows associated with generalized (k-n) black-bounce type spacetimes, which smoothly interpolate between regular black holes and wormholes. We consider a generalization of the metric with free parameters (a, k, n) that modify the mass function and enrich the possible phenomenology. We develop a semi-analytical study of photon orbits, obtaining the critical impact parameter and the shadow radius for different parameter combinations. Subsequently, we perform numerical ray-tracing simulations using the GYOTO code, incorporating optically thick accretion disks and varying the observation angle. Our results reveal characteristic signatures, including the formation of double-ring structures and deformations of the shadow radius, which can serve as observational discriminators between classical black holes and black-bounce solutions.\u0000</div>","PeriodicalId":578,"journal":{"name":"General Relativity and Gravitation","volume":"58 3","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10714-026-03524-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147362798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Laws of black hole mechanics in the Einstein-Gauss-Bonnet theory 爱因斯坦-高斯-博内理论中的黑洞力学定律

IF 2.8 4区物理与天体物理

General Relativity and Gravitation Pub Date : 2026-03-05 DOI: 10.1007/s10714-026-03526-1

Ayan Chatterjee, Sahil Devdutt, Avirup Ghosh

引用次数: 0

Stellar model in third order Lovelock gravity 三阶洛夫洛克引力下的恒星模型

IF 2.8 4区物理与天体物理

General Relativity and Gravitation Pub Date : 2026-03-03 DOI: 10.1007/s10714-026-03522-5

Shavani Naicker, Sunil D. Maharaj, Byron P. Brassel

引用次数: 0

Dark energy battery for magnetic field generation in plasmas in de Sitter spacetimes 德西特时空等离子体磁场产生的暗能量电池

IF 2.8 4区物理与天体物理

General Relativity and Gravitation Pub Date : 2026-03-01 DOI: 10.1007/s10714-026-03531-4

Nicolás Villarroel-Sepúlveda, Pablo S. Moya, Felipe A. Asenjo, Swadesh M. Mahajan

引用次数: 0

The Einstein constraints and differential forms 爱因斯坦约束和微分形式

IF 2.8 4区物理与天体物理

General Relativity and Gravitation Pub Date : 2026-03-01 DOI: 10.1007/s10714-026-03527-0

Andrzej Okołów, Jakub Szymankiewicz

引用次数: 0