Fortschritte Der Physik-Progress of Physics最新文献

{"title":"Issue Information: Fortschritte der Physik 9 / 2026","authors":"","doi":"10.1002/prop.70149","DOIUrl":"https://doi.org/10.1002/prop.70149","url":null,"abstract":"","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"74 9","pages":""},"PeriodicalIF":5.4,"publicationDate":"2026-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/prop.70149","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148903748","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

{"title":"Optical Appearance of the Konoplya–Zhidenko Rotating Non-Kerr Black Hole Surrounded by a Thin Accretion Disk","authors":"Ke-Jian He,&nbsp;Yi Liu,&nbsp;Chen-Yu Yang,&nbsp;Xiao-Xiong Zeng","doi":"10.1002/prop.70146","DOIUrl":"https://doi.org/10.1002/prop.70146","url":null,"abstract":"<div>\u0000 \u0000 <p>In this study, we investigate the optical appearance of rotating Konoplya–Zhidenko non-Kerr black holes in the presence of thin accretion disks, with the aim of examining whether the information of deformation parameters manifest in observable signatures. By employing a fisheye camera model in conjunction with backward ray-tracing techniques, we simulate images for both prograde and retrograde accretion scenarios. The results indicate that the deformation parameter <span></span><math>\u0000 <semantics>\u0000 <mi>ξ</mi>\u0000 <annotation>$xi$</annotation>\u0000 </semantics></math> can partially mitigate the shadow deformation induced by the rotation parameter <span></span><math>\u0000 <semantics>\u0000 <mi>a</mi>\u0000 <annotation>$a$</annotation>\u0000 </semantics></math>. The inner shadow displays characteristic morphological transformations at varying observation angles, transitioning from an axisymmetric circular form at low angles to a hat-like configuration at higher angles. Furthermore, at high observational inclination angles, the direct image and the lensed image become distinctly discernible, and an increase in the deformation parameter <span></span><math>\u0000 <semantics>\u0000 <mi>ξ</mi>\u0000 <annotation>$xi$</annotation>\u0000 </semantics></math> enhances the observed intensity of the image. Interestingly, the motion behavior of the accretion flow influences the observed intensity distribution on the screen, a finding that is consistent with the redshift distribution. Hence, variations in the deformation parameter <span></span><math>\u0000 <semantics>\u0000 <mi>ξ</mi>\u0000 <annotation>$xi$</annotation>\u0000 </semantics></math>, the observation angles, and the motion behavior of the accretion flow collectively influence the observable appearance of the black hole. We expect this work to provide valuable references for identifying observable signatures of spacetime deviations from general relativity.</p></div>","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"74 8","pages":""},"PeriodicalIF":5.4,"publicationDate":"2026-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148784411","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}

{"title":"Toward a T-Dual Emergent Gravity","authors":"Daniel Bermudez,&nbsp;Raju Roychowdhury","doi":"10.1002/prop.70141","DOIUrl":"https://doi.org/10.1002/prop.70141","url":null,"abstract":"<div>\u0000 \u0000 <p>Emergent gravity provides a geometric interpretation of noncommutative <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>U</mi>\u0000 <mo>(</mo>\u0000 <mn>1</mn>\u0000 <mo>)</mo>\u0000 </mrow>\u0000 <annotation>$U(1)$</annotation>\u0000 </semantics></math> gauge theory, in which deformations of a symplectic structure induced by a gauge field are absorbed by diffeomorphisms via the Darboux theorem, giving rise to an effective Riemannian metric. Independently, topological T-duality identifies pairs of principal torus bundles equipped with distinct geometric and flux data whose associated sigma models are physically equivalent. In this work, we place both constructions within the framework of generalized geometry, thereby enabling a uniform treatment of emergent metrics and T-duality transformations. We describe emergent gravity in terms of generalized metrics on exact Courant algebroids and interpret the Seiberg–Witten map as a composition of <span></span><math>\u0000 <semantics>\u0000 <mi>B</mi>\u0000 <annotation>$B$</annotation>\u0000 </semantics></math> and <span></span><math>\u0000 <semantics>\u0000 <mi>θ</mi>\u0000 <annotation>$theta$</annotation>\u0000 </semantics></math> transformations acting on a flat background. Using the <i>Gualtieri–Cavalcanti formulation</i> of T-duality as an isomorphism of Courant algebroids, we construct a natural notion of a T-dual emergent gravity for principal torus bundles. For flat spacetimes with trivial H-flux, we show that the T-dual generalized metric again admits an emergent gravity interpretation. At the level of generalized geometry, this result is encoded in a commutative diagram in which T-duality interchanges the order of the transformations responsible for the emergence of the metric. For general <span></span><math>\u0000 <semantics>\u0000 <msup>\u0000 <mi>T</mi>\u0000 <mn>2</mn>\u0000 </msup>\u0000 <annotation>$mathbb {T}^2$</annotation>\u0000 </semantics></math>-fibrations, we derive explicit formulas for the T-dual generalized metric and show that the dual background generically carries a nontrivial H-flux, which obstructs a direct interpretation in terms of conventional symplectic emergent gravity and necessitates an extension of the framework to nonexact Courant algebroids. Our results provide a precise mathematical link between emergent gravity and T-duality and indicate that generalized geometry furnishes the natural setting for a T-duality–covariant formulation of emergent gravity, including backgrounds with nonvanishing flux.</p></div>","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"74 8","pages":""},"PeriodicalIF":5.4,"publicationDate":"2026-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148783582","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}

{"title":"Cosmographic Analysis of the Rastall Gravity Model With Recent Baryon Acoustic Oscillations and Supernova Samples","authors":"Manish Yadav,&nbsp;Archana Dixit,&nbsp;Anirudh Pradhan,&nbsp;M. S. Barak","doi":"10.1002/prop.70144","DOIUrl":"https://doi.org/10.1002/prop.70144","url":null,"abstract":"&lt;div&gt;\u0000 \u0000 &lt;p&gt;We perform a comprehensive cosmographic analysis of the Rastall gravity extension of the standard &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;Λ&lt;/mi&gt;\u0000 &lt;mi&gt;CDM&lt;/mi&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$Lambda{rm CDM}$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; model within a spatially flat FLRW framework. We employ the latest observational datasets, including the DR2, cosmic chronometers (CC), and Type Ia supernova samples (PP&amp;SH0ES, Union3, DES-5yr, and DES-Dovekie). We constrain the free parameters for the Rastall gravity model using Markov Chain Monte Carlo (MCMC) simulations implemented through the MontePython and CLASS codes, yielding robust and tightly constrained results. Our analysis reveals that the mean value of the Rastall parameter &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mi&gt;ε&lt;/mi&gt;\u0000 &lt;annotation&gt;$epsilon$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; is of order &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;msup&gt;\u0000 &lt;mn&gt;10&lt;/mn&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mo&gt;−&lt;/mo&gt;\u0000 &lt;mn&gt;4&lt;/mn&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/msup&gt;\u0000 &lt;annotation&gt;$10^{-4}$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; for the DR2+CC dataset and remains consistent with zero at the &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mn&gt;68&lt;/mn&gt;\u0000 &lt;mo&gt;%&lt;/mo&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$68%$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; confidence level, suggesting that the Rastall gravity reduces to the standard general relativity description. For the DR2+CC+PP&amp;SH0ES dataset, the constraint on &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mi&gt;ε&lt;/mi&gt;\u0000 &lt;annotation&gt;$epsilon$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; undergoes a substantial change, reaching the order of &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;msup&gt;\u0000 &lt;mn&gt;10&lt;/mn&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mo&gt;−&lt;/mo&gt;\u0000 &lt;mn&gt;3&lt;/mn&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/msup&gt;\u0000 &lt;annotation&gt;$10^{-3}$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; and exhibiting a significant &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mn&gt;3.4&lt;/mn&gt;\u0000 &lt;mi&gt;σ&lt;/mi&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$3.4sigma$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; departure from general relativity (&lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;ε&lt;/mi&gt;\u0000 &lt;mo&gt;=&lt;/mo&gt;\u0000 &lt;mn&gt;0&lt;/mn&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$epsilon =0$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;), also obtain the Hubble constant &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;msub&gt;\u0000 ","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"74 8","pages":""},"PeriodicalIF":5.4,"publicationDate":"2026-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148783583","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}

{"title":"Bouncing Cosmologies From Born–Infeld-Type Gravity","authors":"Yermek Aldabergenov,&nbsp;Wei Lin,&nbsp;Rongjian Li,&nbsp;Ding Ding,&nbsp;Yidun Wan","doi":"10.1002/prop.70145","DOIUrl":"https://doi.org/10.1002/prop.70145","url":null,"abstract":"&lt;div&gt;\u0000 \u0000 &lt;p&gt;We construct a Born–Infeld-type &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;f&lt;/mi&gt;\u0000 &lt;mo&gt;(&lt;/mo&gt;\u0000 &lt;mi&gt;R&lt;/mi&gt;\u0000 &lt;mo&gt;,&lt;/mo&gt;\u0000 &lt;mi&gt;G&lt;/mi&gt;\u0000 &lt;mo&gt;)&lt;/mo&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$f(R,{cal G})$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; modification of gravity, where &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mi&gt;G&lt;/mi&gt;\u0000 &lt;annotation&gt;${cal G}$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; is the Gauss–Bonnet term, by embedding Born–Infeld electrodynamics in a five-dimensional pure modified gravity. This method leads to the correspondence between curvature scalars and electromagnetic field strength scalars – &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;R&lt;/mi&gt;\u0000 &lt;mo&gt;↔&lt;/mo&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;F&lt;/mi&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;μ&lt;/mi&gt;\u0000 &lt;mi&gt;ν&lt;/mi&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/msub&gt;\u0000 &lt;msup&gt;\u0000 &lt;mi&gt;F&lt;/mi&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;μ&lt;/mi&gt;\u0000 &lt;mi&gt;ν&lt;/mi&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/msup&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$Rleftrightarrow F_{mu nu }F^{mu nu }$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; and &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;G&lt;/mi&gt;\u0000 &lt;mo&gt;↔&lt;/mo&gt;\u0000 &lt;msup&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mo&gt;(&lt;/mo&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;ε&lt;/mi&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;μ&lt;/mi&gt;\u0000 &lt;mi&gt;ν&lt;/mi&gt;\u0000 &lt;mi&gt;ρ&lt;/mi&gt;\u0000 &lt;mi&gt;σ&lt;/mi&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/msub&gt;\u0000 &lt;msup&gt;\u0000 &lt;mi&gt;F&lt;/mi&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;μ&lt;/mi&gt;\u0000 &lt;mi&gt;ν&lt;/mi&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/msup&gt;\u0000 &lt;msup&gt;\u0000 &lt;mi&gt;F&lt;/mi&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;ρ&lt;/mi&gt;\u0000 &lt;mi&gt;σ&lt;/mi&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/msup&gt;\u0000 &lt;mo&gt;)&lt;/mo&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;mn&gt;2&lt;/mn&gt;\u0000 &lt;/msup&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;${cal G}leftrightarrow (epsilon _{mu nu rho sigma }F^{mu nu }F^{rho sigma })^2$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; – allowing us to replicate the structure of Born–Infeld electrodynamics in the gravitational sector. The resulting Born–Infeld-type gravity is a ghost-free","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"74 8","pages":""},"PeriodicalIF":5.4,"publicationDate":"2026-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148753413","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}

{"title":"Renormalization Group Corrections to \u0000 \u0000 \u0000 Λ\u0000 CDM\u0000 \u0000 $Lambda{rm CDM}$\u0000 Model and Observational Consequences for \u0000 \u0000 \u0000 H\u0000 0\u0000 \u0000 $H_0$\u0000 Tension","authors":"Nicolas R. Bertini,&nbsp;Marcos H. Novaes,&nbsp;Rodrigo von Marttens,&nbsp;Ilya L. Shapiro","doi":"10.1002/prop.70140","DOIUrl":"https://doi.org/10.1002/prop.70140","url":null,"abstract":"&lt;div&gt;\u0000 \u0000 &lt;p&gt;We explore the renormalization group-based extension of the &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;Λ&lt;/mi&gt;\u0000 &lt;mi&gt;CDM&lt;/mi&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$Lambda{rm CDM}$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; model as a potential solution to the current cosmological tensions. In this approach, both the cosmological constant density and Newton's constant are allowed to vary with the energy scale, as a consequence of the remnant effects of massive quantum fields in the low-energy regime. The corresponding cosmological model is consistent with the principles of quantum field theory, based on the covariance of the vacuum effective action, and is characterized by a unique extra parameter &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mi&gt;ν&lt;/mi&gt;\u0000 &lt;annotation&gt;$nu$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;. Our analysis yields a best-fit value of &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;ν&lt;/mi&gt;\u0000 &lt;mo&gt;=&lt;/mo&gt;\u0000 &lt;mo&gt;−&lt;/mo&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mo&gt;(&lt;/mo&gt;\u0000 &lt;mn&gt;2.5&lt;/mn&gt;\u0000 &lt;mo&gt;±&lt;/mo&gt;\u0000 &lt;mn&gt;1.3&lt;/mn&gt;\u0000 &lt;mo&gt;)&lt;/mo&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;mo&gt;×&lt;/mo&gt;\u0000 &lt;msup&gt;\u0000 &lt;mn&gt;10&lt;/mn&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mo&gt;−&lt;/mo&gt;\u0000 &lt;mn&gt;4&lt;/mn&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/msup&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$nu = - (2.5 pm 1.3)times 10^{-4}$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;, placing the &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;Λ&lt;/mi&gt;\u0000 &lt;mi&gt;CDM&lt;/mi&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$Lambda{rm CDM}$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; limit at the &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mn&gt;2&lt;/mn&gt;\u0000 &lt;mi&gt;σ&lt;/mi&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$2sigma$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; region of the &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mi&gt;ν&lt;/mi&gt;\u0000 &lt;annotation&gt;$nu$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; posterior. This narrow range is consistent with data from CMB (Planck), BAO (DESI), and SN Ia (DES Y5). Our result also alleviates the &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;H&lt;/mi&gt;\u0000 &lt;mn&gt;0&lt;/mn&gt;\u0000 &lt;/msub&gt;\u0000 &lt;annotation&gt;$H_0$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; tension and is consistent with the previously established constraints from large-scale structure. In these kind of models, there is a link between cosmology and particle physics. Our results point to possibility of a new physics, characterized by a mas","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"74 8","pages":""},"PeriodicalIF":5.4,"publicationDate":"2026-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148753553","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}

{"title":"Long-Lived Quasinormal Frequencies for Regular Black Hole Supported by the Einasto Profile in the Presence of the Magnetic Field","authors":"Milena Skvortsova","doi":"10.1002/prop.70142","DOIUrl":"https://doi.org/10.1002/prop.70142","url":null,"abstract":"<div>\u0000 \u0000 <p>We investigate quasinormal modes, gray-body factors, and absorption cross-sections of a massive scalar field in regular black-hole spacetimes supported by the Einasto density profile. The analysis is performed for <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mover>\u0000 <mi>n</mi>\u0000 <mo>∼</mo>\u0000 </mover>\u0000 <mo>=</mo>\u0000 <mn>1</mn>\u0000 <mo>/</mo>\u0000 <mn>2</mn>\u0000 </mrow>\u0000 <annotation>$tilde{n}=1/2$</annotation>\u0000 </semantics></math>, 1, and 5, where the scalar mass <span></span><math>\u0000 <semantics>\u0000 <mi>μ</mi>\u0000 <annotation>$mu$</annotation>\u0000 </semantics></math> is treated as an effective parameter induced by an external environment. Quasinormal frequencies are computed with high-order WKB expansions and Padé resummation, and are cross-checked by time-domain evolution. We show that increasing the effective mass and varying the Einasto parameters can strongly suppress the damping rate, leading to long-lived modes and clear quasi-resonant behavior. Gray-body factors obtained from direct WKB transmission and from the QNM-based correspondence agree well in the considered regimes, while their differences remain controlled. Using the transmission coefficients, we derive partial and total absorption cross-sections and demonstrate the expected transition from low-frequency suppression to efficient high-frequency absorption. Our results show that regularity of the core together with environmental parameters leaves a noticeable imprint on both ringdown and scattering observables. Within this setup, the magnetic field acts as the physical agent that controls the effective mass scale and therefore governs how close the system can approach the quasi-resonant regime.</p></div>","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"74 8","pages":""},"PeriodicalIF":5.4,"publicationDate":"2026-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148753179","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}

{"title":"Fermion Localization in an Extra-Dimensional \u0000 \u0000 \u0000 f\u0000 (\u0000 Q\u0000 ,\u0000 T\u0000 )\u0000 \u0000 $f(Q,mathcal {T})$\u0000 Gravity With Cuscuton Dynamics","authors":"A. R. P. Moreira,&nbsp;Shi-Hai Dong,&nbsp;Emmanuel N. Saridakis","doi":"10.1002/prop.70139","DOIUrl":"https://doi.org/10.1002/prop.70139","url":null,"abstract":"<div>\u0000 \u0000 <p>This paper is aimed at investigating a codimension-one thick brane with cuscuton dynamics within the framework of <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>f</mi>\u0000 <mo>(</mo>\u0000 <mi>Q</mi>\u0000 <mo>,</mo>\u0000 <mi>T</mi>\u0000 <mo>)</mo>\u0000 </mrow>\u0000 <annotation>$f(Q,mathcal {T})$</annotation>\u0000 </semantics></math> modified symmetric teleparallel gravity, where <span></span><math>\u0000 <semantics>\u0000 <mi>Q</mi>\u0000 <annotation>$Q$</annotation>\u0000 </semantics></math> is the nonmetricity scalar and <span></span><math>\u0000 <semantics>\u0000 <mi>T</mi>\u0000 <annotation>$mathcal {T}$</annotation>\u0000 </semantics></math> is the energy-momentum tensor trace. The brane is generated by a scalar field with noncanonical dynamics containing a cuscuton term, which modifies the structure of the scalar sector without introducing additional propagating degrees of freedom. By employing the first-order formalism, analytical solutions for the scalar field, warp factor, scalar potential, and energy density are obtained for different choices of superpotentials, including sine-Gordon, polynomial, and linear forms. We analyze how the parameters controlling the nonmetricity corrections and the matter coupling affect the internal structure and localization properties of the brane. In addition, the localization of spin-<span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mn>1</mn>\u0000 <mo>/</mo>\u0000 <mn>2</mn>\u0000 </mrow>\u0000 <annotation>$1/2$</annotation>\u0000 </semantics></math> fermions is studied through a minimal Yukawa coupling between the fermionic field and the background scalar field. The resulting Schrödinger-like equations exhibit a supersymmetric structure that guarantees the stability of the fermionic spectrum and allows the localization of the chiral zero mode on the brane. Furthermore, we investigate the spectrum of massive fermionic modes and identify resonant states through the relative probability method. The appearance of these quasi-localized modes indicates the presence of metastable fermionic excitations associated with the internal structure of the brane.</p></div>","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"74 8","pages":""},"PeriodicalIF":5.4,"publicationDate":"2026-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148752742","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}

{"title":"Boundary-Only Weak Deflection by Regular Black Holes, Black-Bounces, Wormholes, and Static Quadrupolar Spacetimes","authors":"Reggie C. Pantig,&nbsp;Ali Övgün","doi":"10.1002/prop.70138","DOIUrl":"https://doi.org/10.1002/prop.70138","url":null,"abstract":"<p>We apply the boundary-only isothermal formulation of finite-distance weak gravitational deflection to regular black holes, black-bounces, traversable wormholes, non-asymptotically flat backgrounds, and static quadrupolar spacetimes. The methodological advance is not a new value for a known bending angle. It is a metric-level reduction that removes the Gaussian-curvature area integral before any particular spacetime is chosen. Local conformal flatness converts the bulk term in the Gauss–Bonnet construction into boundary information from the isothermal conformal factor, while the logarithmic conformal derivative provides a normalization-invariant input that does not require a photon sphere, a circular null orbit, or an auxiliary calibration radius. At leading weak-field order, the source and receiver dependence is carried by a reusable set of endpoint functions, whereas the spacetime dependence is carried by the radial expansion of a single boundary datum. This separation is useful when the relevant circular orbit is absent, nonunique, or unrelated to the observed ray, and when asymptotic scattering is unavailable. We demonstrate this scope using Bardeen, Hayward, and Ayón-Beato–García regular black holes, the Simpson–Visser family, Ellis–Bronnikov and Morris–Thorne wormholes, Schwarzschild–global-monopole and Mannheim–Kazanas backgrounds, and the equatorial sectors of Zipoy–Voorhees and Erez–Rosen geometries. These applications serve as stress tests and expose a common classification of mass, charge, throat, regular-core, conical-background, cosmological-background, and quadrupolar terms. The present formulation is restricted to static regions with a Riemannian equatorial optical metric and a suitable isothermal covering. The explicit model corrections reported here are leading straight-ray boundary contributions, not complete higher-order post-Minkowskian deflection angles.</p>","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"74 8","pages":""},"PeriodicalIF":5.4,"publicationDate":"2026-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/prop.70138","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148752741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

{"title":"Role of the Dynamic Degree of Freedom in Scalar–Tensor Non-Metricity Gravity With Curved FLRW Geometry","authors":"Ghulam Murtaza,&nbsp;Avik De,&nbsp;Andronikos Paliathanasis","doi":"10.1002/prop.70135","DOIUrl":"https://doi.org/10.1002/prop.70135","url":null,"abstract":"<div>\u0000 \u0000 <p>We investigate a non-minimally coupled scalar field theory within the framework of scalar–tensor non-metricity gravity, focusing on spatially curved FLRW spacetimes. Employing the dynamical systems approach with Hubble-normalized variables, we reformulate the field equations into an autonomous system and analyze the resulting critical points. Four distinct cases, determined by the scalar coupling and potential functions, are studied in detail. For each case, we identify the existence and stability of equilibrium points, classify their cosmological behavior, and compute key observables such as the deceleration parameter and effective equation of state. Our results reveal that the theory admits matter-dominated eras, parameter-dependent saddle solutions, and stable de Sitter attractors capable of driving late-time cosmic acceleration. The additional scalar degree of freedom introduced by the non-coincident gauge plays a crucial role in determining the system's dynamics and viability. These findings emphasize the potential of scalar–tensor non-metricity gravity as a robust extension of general relativity and motivate further confrontation of the model with observational data.</p></div>","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"74 8","pages":""},"PeriodicalIF":5.4,"publicationDate":"2026-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148752550","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}