Classical and Quantum Gravity最新文献_第9页

The equations of motion in spacetime endowed with stationary metric of general relativity and the equivalent gravitational scalar generalized potential of special relativity 赋予广义相对论的静止度规和狭义相对论的等效引力标量广义势的时空运动方程

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2026-02-18 DOI: 10.1088/1361-6382/ae4202

Spyridon Vossos, Elias Vossos and Chariklis Ntelis

{"title":"The equations of motion in spacetime endowed with stationary metric of general relativity and the equivalent gravitational scalar generalized potential of special relativity","authors":"Spyridon Vossos, Elias Vossos and Chariklis Ntelis","doi":"10.1088/1361-6382/ae4202","DOIUrl":"https://doi.org/10.1088/1361-6382/ae4202","url":null,"abstract":"The gravity in the context of general relativity (GR) as dynamical curvature of spacetime remains a principal impediment not only to its unification with the other fundamental interactions but also to the formulation of quantum gravity. One possible resolution involves considering gravity in the context of special relativity (SR). This paper presents a procedure, which correlates the GR metrics of curved spacetime and the SR gravitational scalar generalized potential. The GR time dilation is the key-point for the correlation of the two gravities, which implies the corresponding SR Lagrangian. Previous papers have already demonstrated the procedure and the results in cases of Friedmann–Lemaitre–Robertson–Walker metric, wormholes with spherical symmetry, and Schwarzschild metric (where not only the gravitational motions (free falls) but also the Gravitational Red Shift in the context of SR are exactly the same as those in the context of GR with stationary metric). This paper analytically derives the general formulae of Equations of Motion in Spacetime endowed with Stationary metric in the context of GR and the ones in the context of SR, proving that they are exactly the same. Finally, it presents the case studies of gravitational motions around Schwarzschild blackhole, Kerr rotating blackhole and Standard Ellis–Bronnikov wormhole. Thus, it is shown that these motions have an equivalent SR viewpoint.","PeriodicalId":10282,"journal":{"name":"Classical and Quantum Gravity","volume":"54 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146210089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Gravitational waves on Kerr black holes: II. Metric reconstruction with cosmological constant 克尔黑洞上的引力波：2。具有宇宙常数的度量重建

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2026-02-18 DOI: 10.1088/1361-6382/ae4282

Roman Berens, Trevor Gravely and Alexandru Lupsasca

引用次数: 0

Noble gravitational atoms: self-gravitating black hole scalar wigs with angular momentum number 稀有引力原子：具有角动量数的自引力黑洞标量假发

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2026-02-18 DOI: 10.1088/1361-6382/ae4160

Miguel Alcubierre, Juan Barranco, Argelia Bernal, Juan Carlos Degollado, Alberto Diez-Tejedor, Miguel Megevand, Darío Núñez and Olivier Sarbach

{"title":"Noble gravitational atoms: self-gravitating black hole scalar wigs with angular momentum number","authors":"Miguel Alcubierre, Juan Barranco, Argelia Bernal, Juan Carlos Degollado, Alberto Diez-Tejedor, Miguel Megevand, Darío Núñez and Olivier Sarbach","doi":"10.1088/1361-6382/ae4160","DOIUrl":"https://doi.org/10.1088/1361-6382/ae4160","url":null,"abstract":"We present new spherically symmetric solutions of the Einstein–Klein–Gordon equations in a quasi-stationary approximation that describe self-gravitating scalar field configurations around a black hole, including angular momentum number . An approach analogous to the one which gives rise to -boson stars is used here to construct self-gravitating ‘gravitational atoms’ with . We refer to these new solutions as noble gravitational atoms, by analogy with noble atoms, which are characterized by closed electron shells. We show that, in the proper limit, noble gravitational atoms approach -boson stars globally, displaying noticeable differences only in a region very close to the event horizon. Noble gravitational atoms with sometimes present density maxima located at relatively large radii, with small density close to the horizon for . Furthermore, they do not always present the typical density spike at the event horizon if ; on the contrary, they sometimes exhibit a small dip there. When , a spike can appear, but its contribution to the total mass density is always negligible. The size, density, and lifetime of these objects vary significantly depending on the parameters, being in some cases as large as galaxies, as dilute as dark matter, and as long-lived as the Universe itself.","PeriodicalId":10282,"journal":{"name":"Classical and Quantum Gravity","volume":"1 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146210088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

A collision operator for field-mediated interactions in general relativistic kinetic theory 广义相对论运动理论中场介导相互作用的碰撞算符

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2026-02-18 DOI: 10.1088/1361-6382/ae415d

Naoki Sato

引用次数: 0

Cosmological implications of f ( R , Σ ... f (R， Σ…

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2026-02-18 DOI: 10.1088/1361-6382/ae3e35

S R Bhoyar and Yash B Ingole

{"title":"Cosmological implications of f ( R , Σ ...","authors":"S R Bhoyar and Yash B Ingole","doi":"10.1088/1361-6382/ae3e35","DOIUrl":"https://doi.org/10.1088/1361-6382/ae3e35","url":null,"abstract":"We explore the cosmological behavior of the recently proposed gravity theory, which generalizes the standard framework by incorporating an additional Ricci-torsion scalar Σ to account for torsion-induced effects within the spacetime geometry. Employing the Efstathiou equation of state (EoS) parameterization in a spatially flat Friedmann–Lemaître–Robertson–Walker (FLRW) background, we derive the modified field equations and analytically reconstruct the Hubble parameter. The model parameters are constrained using the Cosmic Chronometer (CC) and Pantheon+SH0ES supernova datasets through Markov Chain Monte Carlo analysis. Our results reveal that the framework can successfully reproduce the late-time accelerated expansion of the Universe without the need for an explicit cosmological constant. The resulting effective EoS evolves within the quintessence regime and approaches the ΛCDM limit at low redshift. Furthermore, energy conditions, sound speed stability, and thermodynamic consistency are examined, confirming the physical viability of the model. These findings suggest that the inclusion of the Ricci-torsion term Σ offers a promising geometrical mechanism for cosmic acceleration and helps alleviate current observational tensions in Hubble parameter measurements.","PeriodicalId":10282,"journal":{"name":"Classical and Quantum Gravity","volume":"17 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146210087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Causal fermion systems: spacetime as the web of correlations of a many-body quantum system 因果费米子系统：作为多体量子系统相关网络的时空

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2026-02-18 DOI: 10.1088/1361-6382/ae2379

Patrick Fischer and Claudio F Paganini

引用次数: 0

A numerical approach to particle creation in accelerating toy models 加速玩具模型中粒子产生的数值方法

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2026-02-18 DOI: 10.1088/1361-6382/ae4201

Pedro Duarte-Baptista, Alex Vañó-Viñuales and Adrián del Río

{"title":"A numerical approach to particle creation in accelerating toy models","authors":"Pedro Duarte-Baptista, Alex Vañó-Viñuales and Adrián del Río","doi":"10.1088/1361-6382/ae4201","DOIUrl":"https://doi.org/10.1088/1361-6382/ae4201","url":null,"abstract":"The formation of black holes by the gravitational collapse of stars is known to spontaneously excite particle pairs out of the quantum vacuum. For the canonical vacuum state at past null infinity, the expected number of particles received at future null infinity can be obtained in full closed form at sufficiently late times. However, for intermediate times, or for more complicated astrophysical processes (e.g. binary black hole mergers), the problem is technically challenging and has not yet been resolved. We develop here a numerical approach to study scattering problems of massless quantum fields in asymptotically flat spacetimes, based on the hyperboloidal slice method used in numerical relativity and perturbation theory. This promising approach can reach both past and future null infinities, and therefore it has the potential to address the Hawking scattering problem more rigorously than evolution on the usual Cauchy slices. In this first work, we test this approach with some dynamical toy models in Minkowski using effective potentials that mimic the effects of gravity, and compute the spectrum of particles received at future null infinity. We finally discuss future prospects for applying this framework in more relevant gravitational scenarios.","PeriodicalId":10282,"journal":{"name":"Classical and Quantum Gravity","volume":"31 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146210430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Studies on Carrollian quantum field theories 卡罗量子场论的研究

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2026-02-18 DOI: 10.1088/1361-6382/ae4310

Aditya Sharma

引用次数: 0

On the local existence for the characteristic initial value problem for the Einstein–Dirac system Einstein-Dirac系统特征初值问题的局部存在性

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2026-02-17 DOI: 10.1088/1361-6382/ae4088

Peng Zhao and Xiaoning Wu

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Static spacetimes with a Finsler angular sector 具有芬斯勒角扇区的静态时空