{"title":"Issue Information: Fortschritte der Physik 8 / 2025","authors":"","doi":"10.1002/prop.70027","DOIUrl":"https://doi.org/10.1002/prop.70027","url":null,"abstract":"","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"73 8","pages":""},"PeriodicalIF":7.8,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/prop.70027","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144869223","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":"Stability Analysis of Dilaton-Inspired Scalar Field within the Geometrical Trinity of Gravity","authors":"Youri Carloni, Orlando Luongo, Andronikos Paliathanasis","doi":"10.1002/prop.70021","DOIUrl":"https://doi.org/10.1002/prop.70021","url":null,"abstract":"<p>The dynamics of the dilaton-inspired scalar field are investigated, formally rewritten by means of a Brans-Dicke Lagrangian, within the framework of <i>geometrical trinity of gravity</i>. In this respect, a stability analysis is performed by adopting a non-flat Friedmann–Robertson–Walker (FRW) metric and considering the well-established exponential potential in three distinct gravitational frameworks: general relativity, teleparallel gravity, and symmetric-teleparallel gravity. By comparing the scalar field behaviors across these theories are compared, the role of curvature, torsion, and non-metricity in shaping cosmic evolution is highlighted. The analysis reveals that, both in general relativity and teleparallel gravity, the dilaton-inspired field can drive the accelerated expansion of the universe, effectively behaving as cosmological constant at late times. In contrast, within the symmetric teleparallel gravity scenario, the performance of a complete linear stability analysis is prevented by the use of the non-coincident gauge. Nevertheless, the latter paradigm introduces complexity into the autonomous system, resulting in a structurally different analysis. For general relativity and teleparallel scenarios, the regions of attractor solutions and unphysical domains in which we do not expect the viability of our dilaton-inspired Lagrangian are remarked. However, within the framework of symmetric-teleparallel gravity, the stability analysis reveals no attractor points for the chosen set of free parameters. In support of these findings, physical conclusions, kinematical studies, and consequences on Friedmann dynamics are thus explored.</p>","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"73 8","pages":""},"PeriodicalIF":7.8,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144870060","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":"Issue Information: Fortschritte der Physik 7 / 2025","authors":"","doi":"10.1002/prop.70022","DOIUrl":"https://doi.org/10.1002/prop.70022","url":null,"abstract":"","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"73 7","pages":""},"PeriodicalIF":5.6,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/prop.70022","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144705558","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":"2-Adic Quantum Mechanics, Continuous-Time Quantum Walks, and the Space Discreteness","authors":"W. A. Zúñiga-Galindo","doi":"10.1002/prop.70019","DOIUrl":"https://doi.org/10.1002/prop.70019","url":null,"abstract":"<p>The authors show that a large class of 2-adic Schrödinger equations is the scaling limit of certain continuous-time quantum Markov chains (CTQMCs). Practically, a discretization of such an equation gives a CTQMC. As a practical result, new types of continuous-time quantum walks (CTQWs) on graphs using two symmetric matrices are constructed. The transport between nodes in one direction is described by one matrix, while the transport between nodes in the opposite direction. This construction includes, as a particular case, the CTQWs constructed using adjacency matrices. The final goal of this work is to contribute to the understanding of the foundations of quantum mechanics (QM) and the role of the hypothesis of the discreteness of space. The connection between 2-adic QM and CTQWs shows that 2-adic QM has a physical meaning. 2-Adic QM is a nonlocal theory because the Hamiltonians used are nonlocal operators, and consequently, spooky actions at a distance are allowed. However, this theory is not a mathematical toy. The violation of Bell's inequality is experimentally confirmed, which implies that realism is allowed by this theory. The authors pointed out several new research problems connected with the foundations of QM.</p>","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"73 8","pages":""},"PeriodicalIF":7.8,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/prop.70019","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144869365","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}
Luis A. Anchordoqui, Ignatios Antoniadis, Dieter Lüst
{"title":"Two Micron-Size Dark Dimensions","authors":"Luis A. Anchordoqui, Ignatios Antoniadis, Dieter Lüst","doi":"10.1002/prop.70015","DOIUrl":"https://doi.org/10.1002/prop.70015","url":null,"abstract":"<p>Two extra dimensions of micron scale might simultaneously address the gauge and cosmological hierarchy problems. In this paper various observational bounds in scenarios with one and two large extra dimensions are examined, to see if they are compatible with the micron scale. The authors show that consistency with astrophysical observations requires that two extra dimensions of micron scale must not admit isometries, whereby conservation of the extra dimensional momentum is violated, allowing the massive Kaluza–Klein modes of the graviton to decay to other lighter graviton modes. However, to remain consistent with cosmological observations two extra dimensions of micron scale require a delicately fine tuning of the temperature at which the universe enters the radiation dominated epoch. Diving into this fine-tuned scenario the authors also show that primordial black holes with masses in the range <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <msup>\u0000 <mn>10</mn>\u0000 <mn>8</mn>\u0000 </msup>\u0000 <mo>≲</mo>\u0000 <msub>\u0000 <mi>M</mi>\u0000 <mi>BH</mi>\u0000 </msub>\u0000 <mo>/</mo>\u0000 <mi>g</mi>\u0000 <mo>≲</mo>\u0000 <msup>\u0000 <mn>10</mn>\u0000 <mn>21</mn>\u0000 </msup>\u0000 </mrow>\u0000 <annotation>$10^8 lesssim M_{rm BH}/{rm g} lesssim 10^{21}$</annotation>\u0000 </semantics></math> could make all cosmological dark matter.</p>","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"73 8","pages":""},"PeriodicalIF":7.8,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/prop.70015","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144869364","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}
Iqra Ibrar, Eman M. Moneer, Muhammad Sharif, Euaggelos E. Zotos
{"title":"Compact Star Structure Under Hybrid and Logarithmic \u0000 \u0000 \u0000 f\u0000 (\u0000 Q\u0000 ,\u0000 T\u0000 )\u0000 \u0000 $f(mathbb {Q},mathcal {T})$\u0000 Rastall Gravity","authors":"Iqra Ibrar, Eman M. Moneer, Muhammad Sharif, Euaggelos E. Zotos","doi":"10.1002/prop.70016","DOIUrl":"https://doi.org/10.1002/prop.70016","url":null,"abstract":"<p>Spherically symmetric anisotropic solutions that describe compact stellar objects within the framework of modified Rastall <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>$f(mathbb {Q},mathcal {T})$</annotation>\u0000 </semantics></math> gravity are explored in this manuscript, where the non-metricity scalar represented by <span></span><math>\u0000 <semantics>\u0000 <mi>Q</mi>\u0000 <annotation>$mathbb {Q}$</annotation>\u0000 </semantics></math> and the trace of the energy-momentum tensor is denoted by <span></span><math>\u0000 <semantics>\u0000 <mi>T</mi>\u0000 <annotation>$mathcal {T}$</annotation>\u0000 </semantics></math>. To achieve this, the Karmarkar condition is applied and a relationship between the metric functions to solve the resulting field equations is established. In this framework, the field equations are constructed and the behavior of <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>h</mi>\u0000 <mo>(</mo>\u0000 <mi>Q</mi>\u0000 <mo>,</mo>\u0000 <mi>T</mi>\u0000 <mo>)</mo>\u0000 </mrow>\u0000 <annotation>$h(mathbb {Q},mathcal {T})$</annotation>\u0000 </semantics></math> under two different scenarios is investigated. In the first scenario, a hybrid form <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>f</mi>\u0000 <mrow>\u0000 <mo>(</mo>\u0000 <mi>Q</mi>\u0000 <mo>,</mo>\u0000 <mi>T</mi>\u0000 <mo>)</mo>\u0000 </mrow>\u0000 <mo>=</mo>\u0000 <mi>ψ</mi>\u0000 <msup>\u0000 <mi>Q</mi>\u0000 <mi>n</mi>\u0000 </msup>\u0000 <msup>\u0000 <mi>e</mi>\u0000 <mrow>\u0000 <mi>Q</mi>\u0000 <mi>m</mi>\u0000 </mrow>\u0000 </msup>\u0000 <mo>+</mo>\u0000 <mi>η</mi>\u0000 <mi>T</mi>\u0000 </mrow>\u0000 <annotation>$f(mathbb {Q},mathcal {T}) = psi mathbb {Q}^n e^{mathbb {Q} m} + eta mathcal {T}$</annotation>\u0000 </semantics></math> is employed along with a linear equation of state <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <msub>\u0000 <mi>p</mi>\u0000 <mi>r</mi>\u0000 </msub>\u0000 <mo>=</mo>\u0000 <mi>a</mi>\u0000 <mi>ρ</mi>\u0000 <mo>+</mo>\u0000 <mi>b</mi>\u0000 </mrow>\u0000 <annotatio","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"73 8","pages":""},"PeriodicalIF":7.8,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144869201","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}