Fortschritte Der Physik-Progress of Physics最新文献

{"title":"Issue Information: Fortschritte der Physik 9–10 / 2024","authors":"","doi":"10.1002/prop.202400907","DOIUrl":"https://doi.org/10.1002/prop.202400907","url":null,"abstract":"","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"72 9-10","pages":""},"PeriodicalIF":5.6,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/prop.202400907","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142429624","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":"F\u0000 (\u0000 Q\u0000 )\u0000 \u0000 $F(Q)$\u0000 Gravity with Gauss–Bonnet Corrections: From Early-Time Inflation to Late-Time Acceleration","authors":"Shin'ichi Nojiri,&nbsp;Sergei D. Odintsov","doi":"10.1002/prop.202400113","DOIUrl":"https://doi.org/10.1002/prop.202400113","url":null,"abstract":"<p>The authors show that in the <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>f</mi>\u0000 <mo>(</mo>\u0000 <mi>Q</mi>\u0000 <mo>)</mo>\u0000 </mrow>\u0000 <annotation>$f(Q)$</annotation>\u0000 </semantics></math> gravity with a non-metricity scalar <span></span><math>\u0000 <semantics>\u0000 <mi>Q</mi>\u0000 <annotation>$Q$</annotation>\u0000 </semantics></math>, the curvatures in Einstein's gravity, that is, the Riemann curvature constructed from the standard Levi-Civita connection, could not be excluded or naturally appear. The first observation is that even in <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>f</mi>\u0000 <mo>(</mo>\u0000 <mi>Q</mi>\u0000 <mo>)</mo>\u0000 </mrow>\u0000 <annotation>$f(Q)$</annotation>\u0000 </semantics></math> gravity, the conservation of the matter energy-momentum tensor is not described by the covariant derivatives in the non-metricity gravity but that is given by the Levi-Civita connection. The commutator of the covariant derivatives in Einstein's gravity inevitably induces the Riemann curvature. There is no symmetry nor principle which prohibits the Riemann curvature in non-metricity gravity. Based on this observation, the authors propose and investigate <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>f</mi>\u0000 <mfenced>\u0000 <mi>Q</mi>\u0000 <mo>,</mo>\u0000 <mi>G</mi>\u0000 </mfenced>\u0000 </mrow>\u0000 <annotation>$fleft(Q, mathcal {G} right)$</annotation>\u0000 </semantics></math> gravity with the Gauss–Bonnet invariant <span></span><math>\u0000 <semantics>\u0000 <mi>G</mi>\u0000 <annotation>$mathcal {G}$</annotation>\u0000 </semantics></math> and its generalizations. The authors also show how <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>f</mi>\u0000 <mfenced>\u0000 <mi>Q</mi>\u0000 <mo>,</mo>\u0000 <mi>G</mi>\u0000 </mfenced>\u0000 </mrow>\u0000 <annotation>$fleft(Q, mathcal {G} right)$</annotation>\u0000 </semantics></math> models realizing any given the Friedmann–Lemaître–Robertson– Walker (FLRW) spacetime can be reconstructed. The reconstruction formalism to cosmology is applied. Explicitly, the gravity models which realize slow roll or constant roll inflation, dark energy epoch as well as the unification of the inflation and dark energy are found. The dynamical autonomous system and the gravitational wave in the theory under investigation are discussed. It is found the condition that the de Sitter spacetime becomes the (stable) fixed point of the system.</p>","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"72 9-10","pages":""},"PeriodicalIF":5.6,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142430154","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":"T-Duality of a Bosonic String in a Weakly Curved Space-Time","authors":"Sonja Dedić,&nbsp;Danijel Obrić","doi":"10.1002/prop.202400162","DOIUrl":"10.1002/prop.202400162","url":null,"abstract":"<p>In this article, the T-dualization of a 3<i>D</i> closed bosonic string, that is propagating in space-time metric with an infinitesimal linear dependence on the coordinates <i>x</i>^μ, is considered. Other fields, Kalb-Ramond and dilaton fields are set to zero. Action with this configuration of fields is not invariant to translations. In order to find the T-dual theory, a generalization of the Buscher procedure is employed, that can be applied to cases with coordinate dependent fields that do not possess translational isometry. Finally, by using transformation laws that connect coordinates of starting and T-dual theories, authors will be able to examine the geometric structure of T-dual theory.</p>","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"72 9-10","pages":""},"PeriodicalIF":5.6,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142198237","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":"Quasinormal Frequencies of Fields with Various Spin in the Quantum Oppenheimer–Snyder Model of Black Holes","authors":"Milena Skvortsova","doi":"10.1002/prop.202400132","DOIUrl":"10.1002/prop.202400132","url":null,"abstract":"<p>A recent development involves an intriguing model of a quantum-corrected black hole, established through the application of the quantum Oppenheimer–Snyder model within loop quantum cosmology [Lewandowski et al., Phys. Rev. Lett. (<b>2023</b>) <i>130</i>, 101501]. Employing both time-domain integration and the Wentzel–Kramers–Brillouin (WKB) approach, the quasinormal frequencies for scalar, electromagnetic, and neutrino perturbations in these quantum-corrected black holes are computed. This analysis reveals that while the real oscillation frequencies undergo only minor adjustments due to the quantum parameter, the damping rate experiences a significant decrease as a result of its influence. The author also deduced the analytic formula for quasinormal frequencies in the eikonal limit and showed that the correspondence between the null geodesics and eikonal quasinormal modes holds in this case.</p>","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"72 9-10","pages":""},"PeriodicalIF":5.6,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142225316","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 7–8 / 2024","authors":"","doi":"10.1002/prop.202400906","DOIUrl":"10.1002/prop.202400906","url":null,"abstract":"","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"72 7-8","pages":""},"PeriodicalIF":5.6,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/prop.202400906","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141949285","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":"Geometrically Deformed Charged Anisotropic Models in f(Q, T) Gravity","authors":"Sneha Pradhan,&nbsp;Sunil Kumar Maurya,&nbsp;Pradyumn Kumar Sahoo,&nbsp;Ghulam Mustafa","doi":"10.1002/prop.202400092","DOIUrl":"10.1002/prop.202400092","url":null,"abstract":"<p>In this study, the geometrically deformed compact objects in the <i>f</i>(<i>Q</i>, <i>T</i>) gravity theory under an electric field through gravitational decoupling via minimal geometric deformation (MGD) technique are developed for the first time. The decoupled field equations are solved via two different mimic approaches <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <msubsup>\u0000 <mi>Θ</mi>\u0000 <mn>0</mn>\u0000 <mn>0</mn>\u0000 </msubsup>\u0000 <mo>=</mo>\u0000 <mi>ρ</mi>\u0000 </mrow>\u0000 <annotation>${Theta}_{0}^{0}=rho $</annotation>\u0000 </semantics></math> and <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <msubsup>\u0000 <mi>Θ</mi>\u0000 <mn>1</mn>\u0000 <mn>1</mn>\u0000 </msubsup>\u0000 <mo>=</mo>\u0000 <msub>\u0000 <mi>p</mi>\u0000 <mi>r</mi>\u0000 </msub>\u0000 </mrow>\u0000 <annotation>${Theta}_{1}^{1}={p}_{r}$</annotation>\u0000 </semantics></math> through the Karmarkar condition. Physical viability tests are conducted on our models and examine how decoupling parameters affect the physical qualities of objects. The obtained models are compared with the observational constraints for neutron stars PSR J1810+174, PSR J1959+2048, and PSR J2215+5135, including GW190814. Particularly, by modifying parameters α and <i>n</i>, the occurrence of a “<i>mass gap</i>” component is accomplished. The resulting models exhibit stable, well-behaved mass profiles, regular behavior and no gravitational collapse, as verified by the Buchdahl–Andréasson's limit. Furthermore, a thorough physical analysis that is based on two parameters: <i>n</i> (<i>f</i>(<i>Q</i>, <i>T</i>)–coupling parameter) and α (decoupling parameter) is provided. This work extends our current understanding of compact star configurations and sheds light on the behavior of compact objects in the <i>f</i>(<i>Q</i>, <i>T</i>) gravity.</p>","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"72 9-10","pages":""},"PeriodicalIF":5.6,"publicationDate":"2024-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141949286","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":"Fuzzy Gravity: Four-Dimensional Gravity on a Covariant Noncommutative Space and Unification with Internal Interactions","authors":"Danai Roumelioti,&nbsp;Stelios Stefas,&nbsp;George Zoupanos","doi":"10.1002/prop.202400126","DOIUrl":"10.1002/prop.202400126","url":null,"abstract":"<p>In the present work, an extended description of the covariant noncommutative space is presented, which accommodates the Fuzzy Gravity model constructed previously. It is based on the historical lesson that the use of larger algebras containing all generators of the isometry of the continuous one helped in formulating a fuzzy covariant noncommutative space. Specifically a further enlargement of the isometry group leads the authors, in addition to the construction of the covariant noncommutative space, also to the suggestion of the group that should be gauged on such a space in order to construct a Fuzzy Gravity theory. As a result, two Fuzzy Gravity models are obtained, one in de Sitter and one in anti-de Sitter space, depending on the extension of the isometry group, and their spontaneous symmetry breaking leading to fuzzy versions of the noncommutative <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>S</mi>\u0000 <mi>O</mi>\u0000 <mo>(</mo>\u0000 <mn>1</mn>\u0000 <mo>,</mo>\u0000 <mn>3</mn>\u0000 <mo>)</mo>\u0000 </mrow>\u0000 <annotation>$SO(1,3)$</annotation>\u0000 </semantics></math> gravity are discussed. In addition, how to introduce fermions in the fuzzy gravity is discussed for the first time, and even more importantly, how to unify the constructed noncommutative-fuzzy gravity with internal interactions based on <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>S</mi>\u0000 <mi>O</mi>\u0000 <mo>(</mo>\u0000 <mn>10</mn>\u0000 <mo>)</mo>\u0000 </mrow>\u0000 <annotation>$SO(10)$</annotation>\u0000 </semantics></math> or <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>S</mi>\u0000 <mi>U</mi>\u0000 <mo>(</mo>\u0000 <mn>5</mn>\u0000 <mo>)</mo>\u0000 </mrow>\u0000 <annotation>$SU(5)$</annotation>\u0000 </semantics></math> as grand unified theories.</p>","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"72 9-10","pages":""},"PeriodicalIF":5.6,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/prop.202400126","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141881271","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":"Form Invariance of Raychaudhuri Equation in the Presence of Inflaton-Type Fields","authors":"Arijit Panda,&nbsp;Debashis Gangopadhyay,&nbsp;Goutam Manna","doi":"10.1002/prop.202400134","DOIUrl":"10.1002/prop.202400134","url":null,"abstract":"<p>We show that the Raychaudhuri equation (RE) remains form invariant for certain solutions of scalar fields <span></span><math>\u0000 <semantics>\u0000 <mi>ϕ</mi>\u0000 <annotation>$phi$</annotation>\u0000 </semantics></math> whose Lagrangian is non-canonical and of the form <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>L</mi>\u0000 <mo>(</mo>\u0000 <mi>X</mi>\u0000 <mo>,</mo>\u0000 <mi>ϕ</mi>\u0000 <mo>)</mo>\u0000 <mo>=</mo>\u0000 <mo>−</mo>\u0000 <mi>V</mi>\u0000 <mo>(</mo>\u0000 <mi>ϕ</mi>\u0000 <mo>)</mo>\u0000 <mi>F</mi>\u0000 <mo>(</mo>\u0000 <mi>X</mi>\u0000 <mo>)</mo>\u0000 </mrow>\u0000 <annotation>$mathcal {L}(X,phi)=-V(phi)F(X)$</annotation>\u0000 </semantics></math>, with <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>X</mi>\u0000 <mo>=</mo>\u0000 <mfrac>\u0000 <mn>1</mn>\u0000 <mn>2</mn>\u0000 </mfrac>\u0000 <msub>\u0000 <mi>g</mi>\u0000 <mrow>\u0000 <mi>μ</mi>\u0000 <mi>ν</mi>\u0000 </mrow>\u0000 </msub>\u0000 <msup>\u0000 <mo>∇</mo>\u0000 <mi>μ</mi>\u0000 </msup>\u0000 <mi>ϕ</mi>\u0000 <msup>\u0000 <mo>∇</mo>\u0000 <mi>ν</mi>\u0000 </msup>\u0000 <mi>ϕ</mi>\u0000 </mrow>\u0000 <annotation>$X=frac{1}{2} g_{mu nu } nabla ^{mu }phi nabla ^{nu } phi$</annotation>\u0000 </semantics></math> and <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>V</mi>\u0000 <mo>(</mo>\u0000 <mi>ϕ</mi>\u0000 <mo>)</mo>\u0000 </mrow>\u0000 <annotation>$V(phi)$</annotation>\u0000 </semantics></math> the potential. Solutions exist for both homogeneous and inhomogeneous fields that are like inflatons. Certain recent observations indicate that the cosmos is inhomogeneous and thus their results are in sync with latest observations. So the RE can accommodate primordial inhomogeneities as well as cosmologically relevant scenarios.</p>","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"72 9-10","pages":""},"PeriodicalIF":5.6,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141865981","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":"Thermodynamic Properties of Regular Phantom Black Hole","authors":"Maryam Haditale,&nbsp;Behrooz Malekolkalami","doi":"10.1002/prop.202300267","DOIUrl":"10.1002/prop.202300267","url":null,"abstract":"<p>The Regular Phantom Black Hole (<b>RPBH</b>)s are of theoretical and observational importance, some of their properties have been studied. In this work, some of thermodynamical properties such as entropy, temperature, etc., in three background cases, that is, flat, de–Sitter (<b>dS</b>) and Anti–de Sitter (<b>AdS</b>) are studied. Many of the RPBH properties, including horizon radius, are (directly or indirectly) dependent on a scale parameter <span></span><math>\u0000 <semantics>\u0000 <mi>b</mi>\u0000 <annotation>$b$</annotation>\u0000 </semantics></math>. Due to the slightly different structure from Schwarzschild—like metrics, the method to express relations between thermodynamical variables requires a new function of the scale parameter. The local and global stability through the Heat Capacity (<b>HC</b>) and Gibbs free Energy (<b>GE</b>), respectively are also treated. In the AdS case, the regularized metric allows a Hawking-Page like phase transition of first order. The calculations and graphs show the results in the flat background, are very similar to Schwarzschild black hole and the asymptotically AdS RPBH is more compatible with physical laws than the dS and flat backgrounds.</p>","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"72 9-10","pages":""},"PeriodicalIF":5.6,"publicationDate":"2024-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141865983","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":"Rényi Holographic Dark Energy","authors":"Ratchaphat Nakarachinda,&nbsp;Chakrit Pongkitivanichkul,&nbsp;Daris Samart,&nbsp;Lunchakorn Tannukij,&nbsp;Pitayuth Wongjun","doi":"10.1002/prop.202400073","DOIUrl":"10.1002/prop.202400073","url":null,"abstract":"<p>In this work, the holographic dark energy model is constructed by using the non-extensive nature of the Schwarzschild black hole via the Rényi entropy. Due to the non-extensivity, the black hole can be stable under the process of fixing the non-extensive parameter. A change undergoing such a process would then motivate us to define the energy density of the Rényi holographic dark energy (RHDE). As a result, the RHDE with choosing the characteristic length scale as the Hubble radius provides the late-time expansion without the issue of causality. Remarkably, the proposed dark energy model contains the non-extensive length scale parameter additional to the standard <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>Λ</mi>\u0000 <mi>CDM</mi>\u0000 </mrow>\u0000 <annotation>$Lambda{rm CDM}$</annotation>\u0000 </semantics></math> model. The cosmic evolution can be characterized by comparing the size of the Universe to this length scale. Moreover, the preferable value of the non-extensive length scale is determined by fitting the model to recent observations. The results of this work would shed light on the interplay between the thermodynamic description of the black hole with non-extensivity and the classical gravity description of the evolution of the Universe.</p>","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"72 7-8","pages":""},"PeriodicalIF":5.6,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141769726","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}