Fortschritte Der Physik-Progress of Physics最新文献

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Traversable Wormholes with a Spontaneous Symmetry Breaking Scalar Field 具有自发对称破缺标量场的可穿越虫洞
IF 5.6 3区 物理与天体物理
Fortschritte Der Physik-Progress of Physics Pub Date : 2025-07-02 DOI: 10.1002/prop.70013
Soumya Chakrabarti, Chiranjeeb Singha
{"title":"Traversable Wormholes with a Spontaneous Symmetry Breaking Scalar Field","authors":"Soumya Chakrabarti,&nbsp;Chiranjeeb Singha","doi":"10.1002/prop.70013","DOIUrl":"https://doi.org/10.1002/prop.70013","url":null,"abstract":"<p>The authors argue that a spherically symmetric traversable wormhole solution of the Einstein field equations can be supported by minimally coupled self-interacting scalar field, which allows a spontaneous symmetry breaking of the field around the wormhole throat. Two cases are studied by the authors: (i) the phantom wormhole solution of Bronnikov and (ii) a generalized Kiselev wormhole. The property of radial null geodesics is studied by authors and the metric can describe either a two-way or a one-way traversable wormhole depending on certain parameter ranges are showed. The scalar field exhibits spontaneous symmetry breaking (SSB) within the coordinate range where a wormhole throat forms and helps one suggest that SSB may act as a threshold for wormhole throat formation. The authors also computed the radius of the photon sphere, the Lyapunov exponent, the shadow radius, and the innermost stable circular orbits for the geometries.</p>","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"73 7","pages":""},"PeriodicalIF":5.6,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144705330","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
Modeling General Asymptotic Calabi–Yau Periods 一般渐近Calabi-Yau周期的建模
IF 5.6 3区 物理与天体物理
Fortschritte Der Physik-Progress of Physics Pub Date : 2025-06-19 DOI: 10.1002/prop.70010
Brice Bastian, Thomas W. Grimm, Damian van de Heisteeg
{"title":"Modeling General Asymptotic Calabi–Yau Periods","authors":"Brice Bastian,&nbsp;Thomas W. Grimm,&nbsp;Damian van de Heisteeg","doi":"10.1002/prop.70010","DOIUrl":"https://doi.org/10.1002/prop.70010","url":null,"abstract":"<p>In the quest to uncovering the fundamental structures that underlie some of the asymptotic Swampland conjectures the authors initiate the general study of asymptotic period vectors of Calabi–Yau manifolds. The strategy is to exploit the constraints imposed by completeness, symmetry, and positivity, which are formalized in asymptotic Hodge theory. The general principles are used to study the periods near any boundary in complex structure moduli space and explain that near most boundaries, leading exponentially suppressed corrections must be present for consistency. The only exception are period vectors near the well-studied large complex structure point. Together with the classification of possible boundaries, the procedure makes it possible to construct general models for these asymptotic periods. The starting point for this construction is the <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>s</mi>\u0000 <mi>l</mi>\u0000 <mo>(</mo>\u0000 <mn>2</mn>\u0000 <mo>)</mo>\u0000 </mrow>\u0000 <annotation>$sl(2)$</annotation>\u0000 </semantics></math>-data classifying the boundary, which is used to construct the asymptotic Hodge decomposition known as the nilpotent orbit. The authors then use the latter to determine the asymptotic period vector. This program has been explicitly carried out for all possible one- and two-moduli boundaries in Calabi–Yau threefolds, and general models for their asymptotic periods have been written down.</p>","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"73 7","pages":""},"PeriodicalIF":5.6,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/prop.70010","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144705478","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}
引用次数: 0
Issue Information: Fortschritte der Physik 6 / 2025 问题信息:物理进展6 / 2025
IF 5.6 3区 物理与天体物理
Fortschritte Der Physik-Progress of Physics Pub Date : 2025-06-10 DOI: 10.1002/prop.70011
{"title":"Issue Information: Fortschritte der Physik 6 / 2025","authors":"","doi":"10.1002/prop.70011","DOIUrl":"https://doi.org/10.1002/prop.70011","url":null,"abstract":"","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"73 6","pages":""},"PeriodicalIF":5.6,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/prop.70011","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144256261","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}
引用次数: 0
Observational Constraints On the Growth Index Parameters in f ( Q ) $f(Q)$ Gravity f(Q)$ f(Q)$重力中生长指数参数的观测约束
IF 5.6 3区 物理与天体物理
Fortschritte Der Physik-Progress of Physics Pub Date : 2025-06-05 DOI: 10.1002/prop.70008
Dalale Mhamdi, Safae Dahmani, Amine Bouali, Imad El Bojaddaini, Taoufik Ouali
{"title":"Observational Constraints On the Growth Index Parameters in \u0000 \u0000 \u0000 f\u0000 (\u0000 Q\u0000 )\u0000 \u0000 $f(Q)$\u0000 Gravity","authors":"Dalale Mhamdi,&nbsp;Safae Dahmani,&nbsp;Amine Bouali,&nbsp;Imad El Bojaddaini,&nbsp;Taoufik Ouali","doi":"10.1002/prop.70008","DOIUrl":"https://doi.org/10.1002/prop.70008","url":null,"abstract":"<p>In this study, the authors analyze constraints on the growth index of matter perturbations, <span></span><math>\u0000 <semantics>\u0000 <mi>γ</mi>\u0000 <annotation>$gamma$</annotation>\u0000 </semantics></math>, 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 </mrow>\u0000 <annotation>$f(Q)$</annotation>\u0000 </semantics></math> gravity, using recent cosmological observations, at the background and the perturbation levels, including <span></span><math>\u0000 <semantics>\u0000 <msup>\u0000 <mtext>Pantheon</mtext>\u0000 <mo>+</mo>\u0000 </msup>\u0000 <annotation>$text{Pantheon}^{+}$</annotation>\u0000 </semantics></math>, Cosmic Chronometer (CC), and Redshift Space Distortion (RSD) datasets. The analysis focuses on quantifying the distortion parameter, which measures the deviation of 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 model from the concordance <span></span><math>\u0000 <semantics>\u0000 <mi>Λ</mi>\u0000 <annotation>$Lambda$</annotation>\u0000 </semantics></math> CDM cosmology at the background level. Specifically, two cases of the growth index parameter are investigated: a constant <span></span><math>\u0000 <semantics>\u0000 <mi>γ</mi>\u0000 <annotation>$gamma$</annotation>\u0000 </semantics></math> and a time-varying <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>γ</mi>\u0000 <mo>(</mo>\u0000 <mi>z</mi>\u0000 <mo>)</mo>\u0000 </mrow>\u0000 <annotation>$gamma (z)$</annotation>\u0000 </semantics></math>. The various parametrizations of the growth index <span></span><math>\u0000 <semantics>\u0000 <mi>γ</mi>\u0000 <annotation>$gamma$</annotation>\u0000 </semantics></math> are investigated, expressed as <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>γ</mi>\u0000 <mo>=</mo>\u0000 <msub>\u0000 <mi>γ</mi>\u0000 <mn>0</mn>\u0000 </msub>\u0000 <mo>+</mo>\u0000 <msub>\u0000 <mi>γ</mi>\u0000 <mn>1</mn>\u0000 </msub>\u0000 <mi>y</mi>\u0000 <mrow>\u0000 <mo>(</mo>\u0000 <mi>z</mi>\u0000 <mo>)</mo>\u0000 </mrow>\u0000 </mrow>\u0000 <annotation>$gamma = gamma _{0} +gamma ","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"73 7","pages":""},"PeriodicalIF":5.6,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144705301","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
Quintessence: An Analytical Study, With Theoretical and Observational Applications 精粹:具有理论和观察应用的分析研究
IF 5.6 3区 物理与天体物理
Fortschritte Der Physik-Progress of Physics Pub Date : 2025-05-22 DOI: 10.1002/prop.70007
David Andriot
{"title":"Quintessence: An Analytical Study, With Theoretical and Observational Applications","authors":"David Andriot","doi":"10.1002/prop.70007","DOIUrl":"https://doi.org/10.1002/prop.70007","url":null,"abstract":"&lt;p&gt;The authors focus on minimally coupled (multi)field quintessence models, of thawing type, and their realistic solutions. In a model-independent manner, these cosmological solutions are described analytically throughout the universe history. Starting with a kination–radiation domination phase, an upper bound on the scalar potential is obtained to guarantee an early kination: &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;V&lt;/mi&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mo&gt;(&lt;/mo&gt;\u0000 &lt;mi&gt;φ&lt;/mi&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;mi&gt;e&lt;/mi&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mo&gt;−&lt;/mo&gt;\u0000 &lt;msqrt&gt;\u0000 &lt;mn&gt;6&lt;/mn&gt;\u0000 &lt;/msqrt&gt;\u0000 &lt;mi&gt;φ&lt;/mi&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/msup&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$V(varphi) ll e^{-sqrt {6} varphi }$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;. Turning to the radiation–matter phase, analytic expressions are obtained for the scale factor &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;a&lt;/mi&gt;\u0000 &lt;mo&gt;(&lt;/mo&gt;\u0000 &lt;mi&gt;t&lt;/mi&gt;\u0000 &lt;mo&gt;)&lt;/mo&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$a(t)$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; (not &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;t&lt;/mi&gt;\u0000 &lt;mo&gt;(&lt;/mo&gt;\u0000 &lt;mi&gt;a&lt;/mi&gt;\u0000 &lt;mo&gt;)&lt;/mo&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$t(a)$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;) and the scalar fields &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;msup&gt;\u0000 &lt;mi&gt;φ&lt;/mi&gt;\u0000 &lt;mi&gt;i&lt;/mi&gt;\u0000 &lt;/msup&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mo&gt;(&lt;/mo&gt;\u0000 &lt;mi&gt;t&lt;/mi&gt;\u0000 &lt;mo&gt;)&lt;/mo&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$varphi ^i(t)$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; (usually neglected). These allow us to evaluate analytically the freezing of scalar fields, typically &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;Δ&lt;/mi&gt;\u0000 &lt;mi&gt;φ&lt;/mi&gt;\u0000 &lt;mo&gt;≲&lt;/mo&gt;\u0000 &lt;msup&gt;\u0000 &lt;mn&gt;10&lt;/mn&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mo&gt;−&lt;/mo&gt;\u0000 &lt;mn&gt;2&lt;/mn&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/msup&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$Delta varphi lesssim 10^{-2}$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;, as well as the transition moment of the dark energy equation of state parameter &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;w&lt;/mi&gt;\u0000 ","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"73 6","pages":""},"PeriodicalIF":5.6,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144256587","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
Large N $N$ Limits of Supersymmetric Quantum Field Theories: A Pedagogical Overview 超对称量子场论的大N$ N$极限:教学综述
IF 5.6 3区 物理与天体物理
Fortschritte Der Physik-Progress of Physics Pub Date : 2025-05-14 DOI: 10.1002/prop.70006
Leonardo Santilli
{"title":"Large \u0000 \u0000 N\u0000 $N$\u0000 Limits of Supersymmetric Quantum Field Theories: A Pedagogical Overview","authors":"Leonardo Santilli","doi":"10.1002/prop.70006","DOIUrl":"https://doi.org/10.1002/prop.70006","url":null,"abstract":"<p>The different large <span></span><math>\u0000 <semantics>\u0000 <mi>N</mi>\u0000 <annotation>$N$</annotation>\u0000 </semantics></math> limits of supersymmetric quantum field theories in three, four, and five dimensions are reviewed. The author distinguishes between the planar limit of SQCD theories, the M-theory limit suited in three and five dimensions, and the long quiver limit. The method to solve exactly the sphere partition functions in each type of limit is spelled out in a pedagogical way. After a comprehensive general treatment of the saddle point approximation in the large <span></span><math>\u0000 <semantics>\u0000 <mi>N</mi>\u0000 <annotation>$N$</annotation>\u0000 </semantics></math> limit, the author also presents an extensive list of examples and detail the calculations. The scope of this overview is to provide an entry-level, computation-oriented understanding of the techniques featured in the field theory side of the AdS/CFT correspondence.</p>","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"73 6","pages":""},"PeriodicalIF":5.6,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144255961","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
Issue Information: Fortschritte der Physik 5 / 2025 问题信息:物理进展5 / 2025
IF 5.6 3区 物理与天体物理
Fortschritte Der Physik-Progress of Physics Pub Date : 2025-05-08 DOI: 10.1002/prop.70009
{"title":"Issue Information: Fortschritte der Physik 5 / 2025","authors":"","doi":"10.1002/prop.70009","DOIUrl":"https://doi.org/10.1002/prop.70009","url":null,"abstract":"","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"73 5","pages":""},"PeriodicalIF":5.6,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/prop.70009","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143925720","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}
引用次数: 0
Inconsistencies of Nonmetric Einstein–Dirac–Maxwell Theories and a Cure for Geometric Flows of f(Q) Black Ellipsoid, Toroid, and Wormhole Solutions 非度量爱因斯坦-狄拉克-麦克斯韦理论的不一致性和f(Q)黑色椭球体、环面和虫洞解的几何流的一种解
IF 5.6 3区 物理与天体物理
Fortschritte Der Physik-Progress of Physics Pub Date : 2025-04-21 DOI: 10.1002/prop.70003
Sergiu I. Vacaru
{"title":"Inconsistencies of Nonmetric Einstein–Dirac–Maxwell Theories and a Cure for Geometric Flows of f(Q) Black Ellipsoid, Toroid, and Wormhole Solutions","authors":"Sergiu I. Vacaru","doi":"10.1002/prop.70003","DOIUrl":"https://doi.org/10.1002/prop.70003","url":null,"abstract":"<p>Many papers on modified gravity theories (MGTs), and metric-affine geometry have been published. New classes of black hole (BH), wormhole (WH), and cosmological solutions involving nonmetricity and torsion fields were constructed. Nevertheless, the fundamental problems of formulating nonmetric Einstein–Dirac–Maxwell (EDM), equations, and study of important nonmetric gravitational, electromagnetic and fermion effects, have not been solved in MGTs. The main goal of this work is to elaborate on a model of nonmetric EDM theory as a generalization of f(Q) gravity. The authors developed anholonomic frame and connection deformation method which allowed authors to decouple in general form and integrate nonmetric gravitational and matter fields equations. New classes of generated quasi-stationary solutions are defined by effective sources with Dirac and Maxwell fields, nonmetricity and torsion fields, and generating functions depending, in general, on all space-time coordinates. For respective nonholonomic parameterizations, such solutions describe nonmetric EDM deformations of BH and cosmological metrics. Variants of nonmetric BH, WH, and toroid solutions with locally anisotropic polarizations of the gravitational vacuum and masses of fermions, and effective electromagnetic sources, are constructed and analyzed. Such nonmetric deformed physical objects cannot be characterized in the framework of the Bekenstein–Hawking paradigm if certain effective horizon/holographic configurations are not involved. It is shown how to define and compute other types of nonmetric geometric thermodynamic variables using generalizations of the concept of G. Perelman W-entropy.</p>","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"73 6","pages":""},"PeriodicalIF":5.6,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144256469","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
Exact Evaluation of Hexagonal Spin-Networks for Topological Quantum Neural Networks 拓扑量子神经网络六方自旋网络的精确评价
IF 5.6 3区 物理与天体物理
Fortschritte Der Physik-Progress of Physics Pub Date : 2025-04-20 DOI: 10.1002/prop.70005
Matteo Lulli, Antonino Marcianò, Emanuele Zappala
{"title":"Exact Evaluation of Hexagonal Spin-Networks for Topological Quantum Neural Networks","authors":"Matteo Lulli,&nbsp;Antonino Marcianò,&nbsp;Emanuele Zappala","doi":"10.1002/prop.70005","DOIUrl":"https://doi.org/10.1002/prop.70005","url":null,"abstract":"<p>The physical scalar product between spin-networks has been shown to be a fundamental tool in the theory of topological quantum neural networks (TQNNs). These are a class of quantum neural networks supported on graphs and related to topological quantum field theory (TQFT), which have been previously introduced by the authors, recovering deep neural networks (DNNs) as their semiclassical limit. However, the effective evaluation of the scalar product remains an obstacle for the applicability of the theory. Inspired by decimation techniques for the computation of the partition function in statistical mechanics, an analytical technique is introduced for the exact evaluation of hexagonal spin-networks of arbitrary size, and describe the corresponding algorithm for the evaluation of the physical scalar product defined by Noui and Perez. The transition amplitudes on certain classes of spin-networks with both classical and quantum recoupling are investigated, obtaining a “continuous” spectrum of the transitions for the former and a discrete one for the latter. The theoretical and computational framework is expected to impact applications in string/tensor-networks for solid state physics, lattice gauge theories, and quantum gravity approaches.</p>","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"73 6","pages":""},"PeriodicalIF":5.6,"publicationDate":"2025-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144256375","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
Thermodynamics of Deformed AdS-Schwarzschild Black Holes in the Presence of Thermal Fluctuations 热波动下变形ads -史瓦西黑洞的热力学
IF 5.6 3区 物理与天体物理
Fortschritte Der Physik-Progress of Physics Pub Date : 2025-04-18 DOI: 10.1002/prop.70004
Dhruba Jyoti Gogoi, Poppy Hazarika, Jyatsnasree Bora, Ranjan Changmai
{"title":"Thermodynamics of Deformed AdS-Schwarzschild Black Holes in the Presence of Thermal Fluctuations","authors":"Dhruba Jyoti Gogoi,&nbsp;Poppy Hazarika,&nbsp;Jyatsnasree Bora,&nbsp;Ranjan Changmai","doi":"10.1002/prop.70004","DOIUrl":"https://doi.org/10.1002/prop.70004","url":null,"abstract":"<p>This paper examines the thermodynamic properties and stability of deformed AdS-Schwarzschild black holes, focusing on the effects of deformation (<span></span><math>\u0000 <semantics>\u0000 <mi>α</mi>\u0000 <annotation>$alpha$</annotation>\u0000 </semantics></math>) and thermal correction parameters (<span></span><math>\u0000 <semantics>\u0000 <msub>\u0000 <mi>β</mi>\u0000 <mn>1</mn>\u0000 </msub>\u0000 <annotation>$beta _1$</annotation>\u0000 </semantics></math>, <span></span><math>\u0000 <semantics>\u0000 <msub>\u0000 <mi>β</mi>\u0000 <mn>2</mn>\u0000 </msub>\u0000 <annotation>$beta _2$</annotation>\u0000 </semantics></math>) on phase transitions and heat capacity. The results show that higher <span></span><math>\u0000 <semantics>\u0000 <mi>α</mi>\u0000 <annotation>$alpha$</annotation>\u0000 </semantics></math> values raise the Hawking-Page critical temperature, enhancing thermal stability. Thermal corrections significantly affect smaller black holes but minimally impact larger ones, leaving second-order phase transitions unchanged. Heat capacity analysis identifies stability regions, with sign changes marking instability. These findings highlight the role of deformation and thermal corrections in black hole stability, offering insights for extending our understanding of black hole thermodynamics.</p>","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"73 6","pages":""},"PeriodicalIF":5.6,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144255965","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
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