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Enumerating Calabi-Yau Manifolds: Placing Bounds on the Number of Diffeomorphism Classes in the Kreuzer-Skarke List 枚举卡拉比-尤(Calabi-Yau)流形:为克鲁泽-斯卡尔克列表中的衍射类数量设定界限
IF 3.9 3区 物理与天体物理
Fortschritte Der Physik-Progress of Physics Pub Date : 2024-03-30 DOI: 10.1002/prop.202300264
Aditi Chandra, Andrei Constantin, Cristofero S. Fraser-Taliente, Thomas R. Harvey, Andre Lukas
{"title":"Enumerating Calabi-Yau Manifolds: Placing Bounds on the Number of Diffeomorphism Classes in the Kreuzer-Skarke List","authors":"Aditi Chandra,&nbsp;Andrei Constantin,&nbsp;Cristofero S. Fraser-Taliente,&nbsp;Thomas R. Harvey,&nbsp;Andre Lukas","doi":"10.1002/prop.202300264","DOIUrl":"10.1002/prop.202300264","url":null,"abstract":"<p>The diffeomorphism class of simply connected smooth Calabi-Yau threefolds with torsion-free cohomology is determined via certain basic topological invariants: the Hodge numbers, the triple intersection form, and the second Chern class. In the present paper, we shed some light on this classification by placing bounds on the number of diffeomorphism classes present in the set of smooth Calabi-Yau threefolds constructed from the Kreuzer-Skarke (KS) list of reflexive polytopes up to Picard number six. The main difficulty arises from the comparison of triple intersection numbers and divisor integrals of the second Chern class up to basis transformations. By using certain basis-independent invariants, some of which appear here for the first time, we are able to place lower bounds on the number of classes. Upper bounds are obtained by explicitly identifying basis transformations, using constraints related to the index of line bundles. Extrapolating our results, we conjecture that the favorable entries of the KS list of reflexive polytopes lead to some <span></span><math>\u0000 <semantics>\u0000 <msup>\u0000 <mn>10</mn>\u0000 <mn>400</mn>\u0000 </msup>\u0000 <annotation>$10^{400}$</annotation>\u0000 </semantics></math> diffeomorphically distinct Calabi-Yau threefolds.</p>","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"72 5","pages":""},"PeriodicalIF":3.9,"publicationDate":"2024-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/prop.202300264","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140564273","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
Extending Anisotropic Interiors admitting Vanishing Complexity in Charged f (R, T) Theory 在带电 f(R,T) 理论中扩展各向异性内部,承认消失复杂性
IF 3.9 3区 物理与天体物理
Fortschritte Der Physik-Progress of Physics Pub Date : 2024-03-24 DOI: 10.1002/prop.202300254
Tayyab Naseer, M. Sharif
{"title":"Extending Anisotropic Interiors admitting Vanishing Complexity in Charged f (R, T) Theory","authors":"Tayyab Naseer,&nbsp;M. Sharif","doi":"10.1002/prop.202300254","DOIUrl":"10.1002/prop.202300254","url":null,"abstract":"&lt;p&gt;This paper extends the definition of the complexity factor for a charged self-gravitating structure in the background of &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;T&lt;/mi&gt;\u0000 &lt;mo&gt;)&lt;/mo&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$f(mathbf {R},mathbf {T})$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; gravity. For this purpose, the modified Einstein-Maxwell field equations and the mass function in terms of interior charge are calculated corresponding to a static sphere. The Reissner-Nordström exterior spacetime and match it with the spherical interior at the hypersurface to determine the junction conditions are adopted then. The curvature tensor is also decomposed orthogonally, resulting in several scalar functions. Only &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;Y&lt;/mi&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;T&lt;/mi&gt;\u0000 &lt;mi&gt;F&lt;/mi&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/msub&gt;\u0000 &lt;annotation&gt;$mathbf {Y}_{TF}$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; encompasses all the required parameters and fulfills the proposed criteria to be the complexity factor for the considered setup is noticed. Moreover, some constraints to minimize the degrees of freedom in the field equations are chosen. To achieve this, complexity-free constraint with four additional conditions depending on the matter sector that lead to different models is employed. The stability of the developed models is also analyzed in the presence and absence of charge through the standard model &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;mn&gt;2&lt;/mn&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;ξ&lt;/mi&gt;\u0000 &lt;mn&gt;3&lt;/mn&gt;\u0000 &lt;/msub&gt;\u0000 &lt;mi&gt;T&lt;/mi&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$mathbf {R}+2xi _3mathbf {T}$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; by varying the values of the model parameter &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;ξ&lt;/mi&gt;\u0000 &lt;mn&gt;3&lt;/mn&gt;\u0000 &lt;/msub&gt;\u0000 &lt;annotation&gt;$xi _3$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;. The presence of charge in compact models corresponding to &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;P&lt;/mi&gt;\u0000 &lt;mi&gt;r&lt;/mi&gt;\u0000 &lt;/msub&gt;\u0000 &lt;mo&gt;=&lt;/mo&gt;\u0000 &lt;mn&gt;0&lt;/mn&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$mathrm{P}_r=0$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;, a polytropic and a linear equation of state make them stable for specific values of &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;msub&gt;\u0000 ","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"72 5","pages":""},"PeriodicalIF":3.9,"publicationDate":"2024-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140298608","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
Exploring T-Duality for Self-Dual Fields 探索自双向场的 T-Duality
IF 3.9 3区 物理与天体物理
Fortschritte Der Physik-Progress of Physics Pub Date : 2024-03-22 DOI: 10.1002/prop.202400023
Subhroneel Chakrabarti, Madhusudhan Raman
{"title":"Exploring T-Duality for Self-Dual Fields","authors":"Subhroneel Chakrabarti,&nbsp;Madhusudhan Raman","doi":"10.1002/prop.202400023","DOIUrl":"10.1002/prop.202400023","url":null,"abstract":"<p>Avatars of T-duality within Sen's formalism for self-dual field strengths in various dimensions are studied. This formalism is shown to naturally accommodate the T-duality relation between Type IIA/IIB theories when compactified on a circle without the need for imposing the self-duality constraint by hand, as is usually done. The study of this formalism is continued on two-dimensional target spacetimes and its study as a worldsheet theory is initiated. In particular, it is shown that Sen's action provides a natural worldsheet-based understanding of twisted and asymmetrically twisted strings. Finally, it is shown that the <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>T</mi>\u0000 <mover>\u0000 <mi>T</mi>\u0000 <mo>¯</mo>\u0000 </mover>\u0000 </mrow>\u0000 <annotation>$mathrm{T}bar{mathrm{T}}$</annotation>\u0000 </semantics></math>-deformed theory of left- and right-chiral bosons described in Sen's formalism possesses a scaling limit that is related via field-theoretic T-duality to a recently studied integrable deformation of quantum mechanics.</p>","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"72 5","pages":""},"PeriodicalIF":3.9,"publicationDate":"2024-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/prop.202400023","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140200446","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
On the Relations between Fermion Masses and Isospin Couplings in the Microscopic Model 论微观模型中费米子质量与等时空耦合的关系
IF 3.9 3区 物理与天体物理
Fortschritte Der Physik-Progress of Physics Pub Date : 2024-03-17 DOI: 10.1002/prop.202300258
Bodo Lampe
{"title":"On the Relations between Fermion Masses and Isospin Couplings in the Microscopic Model","authors":"Bodo Lampe","doi":"10.1002/prop.202300258","DOIUrl":"10.1002/prop.202300258","url":null,"abstract":"<p>Quark and lepton masses and mixings are considered in the framework of the microscopic model. The most general ansatz for the interactions among tetrons leads to a Hamiltonian <span></span><math>\u0000 <semantics>\u0000 <msub>\u0000 <mi>H</mi>\u0000 <mi>T</mi>\u0000 </msub>\u0000 <annotation>$H_T$</annotation>\u0000 </semantics></math> involving Dzyaloshinskii-Moriya (DM), Heisenberg and torsional isospin forces. Diagonalization of the Hamiltonian provides for 24 eigenvalues which are identified as the quark and lepton masses. While the masses of the third and second family arise from DM and Heisenberg type of isospin interactions, light family masses are related to torsional interactions among tetrons. Neutrino masses turn out to be special in that they are given in terms of tiny isospin non-conserving DM, Heisenberg and torsional couplings. The approach not only leads to masses, but also allows to calculate the quark and lepton eigenstates, an issue, which is important for the determination of the CKM and PMNS mixing matrices. Compact expressions for the eigenfunctions of <span></span><math>\u0000 <semantics>\u0000 <msub>\u0000 <mi>H</mi>\u0000 <mi>T</mi>\u0000 </msub>\u0000 <annotation>$H_T$</annotation>\u0000 </semantics></math> are given. The almost exact isospin conservation of the system dictates the form of the lepton states and makes them independent of all the couplings in <span></span><math>\u0000 <semantics>\u0000 <msub>\u0000 <mi>H</mi>\u0000 <mi>T</mi>\u0000 </msub>\u0000 <annotation>$H_T$</annotation>\u0000 </semantics></math>. As a consequence, a parameter-free analytic expression for the PMNS matrix is derived which fits numerically all the measured matrix components. The formula includes a prediction of the leptonic Jarlskog invariant <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <msub>\u0000 <mi>J</mi>\u0000 <mrow>\u0000 <mi>P</mi>\u0000 <mi>M</mi>\u0000 <mi>N</mi>\u0000 <mi>S</mi>\u0000 </mrow>\u0000 </msub>\u0000 <mo>=</mo>\u0000 <mo>−</mo>\u0000 <mn>0.0106</mn>\u0000 </mrow>\u0000 <annotation>$J_{PMNS}=-0.0106$</annotation>\u0000 </semantics></math>. An outlook is given on the treatment of the CKM matrix.</p>","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"72 5","pages":""},"PeriodicalIF":3.9,"publicationDate":"2024-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140152984","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
The Chiral Ring of D = 4 $D=4$ , N = 1 ${mathcal {N}}=1$ SYM with Exceptional Gauge Groups D=4$D=4$, N=1${mathcal {N}}=1$ SYM 的手性环与特殊量规群
IF 3.9 3区 物理与天体物理
Fortschritte Der Physik-Progress of Physics Pub Date : 2024-03-17 DOI: 10.1002/prop.202400027
Martin Cederwall, Gabriele Ferretti
{"title":"The Chiral Ring of \u0000 \u0000 \u0000 D\u0000 =\u0000 4\u0000 \u0000 $D=4$\u0000 , \u0000 \u0000 \u0000 N\u0000 =\u0000 1\u0000 \u0000 ${mathcal {N}}=1$\u0000 SYM with Exceptional Gauge Groups","authors":"Martin Cederwall,&nbsp;Gabriele Ferretti","doi":"10.1002/prop.202400027","DOIUrl":"10.1002/prop.202400027","url":null,"abstract":"<p>The Cachazo–Douglas–Seiberg–Witten conjecture, concerning the algebraic structure of the chiral ring in <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>N</mi>\u0000 <mo>=</mo>\u0000 <mn>1</mn>\u0000 </mrow>\u0000 <annotation>${mathcal {N}}=1$</annotation>\u0000 </semantics></math>, <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>D</mi>\u0000 <mo>=</mo>\u0000 <mn>4</mn>\u0000 </mrow>\u0000 <annotation>$D=4$</annotation>\u0000 </semantics></math> supersymmetric Yang–Mills theory, is proven for exceptional gauge groups. This completes the proof of the conjecture.</p>","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"72 5","pages":""},"PeriodicalIF":3.9,"publicationDate":"2024-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/prop.202400027","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140156774","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
Krylov Complexity of Fermionic and Bosonic Gaussian States 费米子和玻色高斯态的克雷洛夫复杂性
IF 3.9 3区 物理与天体物理
Fortschritte Der Physik-Progress of Physics Pub Date : 2024-03-15 DOI: 10.1002/prop.202400014
Kiran Adhikari, Adwait Rijal, Ashok Kumar Aryal, Mausam Ghimire, Rajeev Singh, Christian Deppe
{"title":"Krylov Complexity of Fermionic and Bosonic Gaussian States","authors":"Kiran Adhikari,&nbsp;Adwait Rijal,&nbsp;Ashok Kumar Aryal,&nbsp;Mausam Ghimire,&nbsp;Rajeev Singh,&nbsp;Christian Deppe","doi":"10.1002/prop.202400014","DOIUrl":"10.1002/prop.202400014","url":null,"abstract":"<p>The concept of <i>complexity</i> has become pivotal in multiple disciplines, including quantum information, where it serves as an alternative metric for gauging the chaotic evolution of a quantum state. This paper focuses on <i>Krylov complexity</i>, a specialized form of quantum complexity that offers an unambiguous and intrinsically meaningful assessment of the spread of a quantum state over all possible orthogonal bases. This study is situated in the context of Gaussian quantum states, which are fundamental to both Bosonic and Fermionic systems and can be fully described by a covariance matrix. While the covariance matrix is essential, it is insufficient alone for calculating Krylov complexity due to its lack of relative phase information is shown. The relative covariance matrix can provide an upper bound for Krylov complexity for Gaussian quantum states is suggested. The implications of Krylov complexity for theories proposing complexity as a candidate for holographic duality by computing Krylov complexity for the thermofield double States (TFD) and Dirac field are also explored.</p>","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"72 5","pages":""},"PeriodicalIF":3.9,"publicationDate":"2024-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140153091","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 2 / 2024 发行信息:物理学进展 2 / 2024
IF 3.9 3区 物理与天体物理
Fortschritte Der Physik-Progress of Physics Pub Date : 2024-03-06 DOI: 10.1002/prop.202400902
{"title":"Issue Information: Fortschritte der Physik 2 / 2024","authors":"","doi":"10.1002/prop.202400902","DOIUrl":"https://doi.org/10.1002/prop.202400902","url":null,"abstract":"","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"72 3","pages":""},"PeriodicalIF":3.9,"publicationDate":"2024-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/prop.202400902","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140053041","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
The Mass Gap of the Space-time and its Shape 时空的质量差距及其形状
IF 3.9 3区 物理与天体物理
Fortschritte Der Physik-Progress of Physics Pub Date : 2024-03-04 DOI: 10.1002/prop.202200210
Ahmed Farag Ali
{"title":"The Mass Gap of the Space-time and its Shape","authors":"Ahmed Farag Ali","doi":"10.1002/prop.202200210","DOIUrl":"10.1002/prop.202200210","url":null,"abstract":"<p>Snyder's quantum space-time which is Lorentz invariant is investigated. It is found that the quanta of space-time have a positive mass that is interpreted as a positive real mass gap of space-time. This mass gap is related to the minimal length of measurement which is provided by Snyder's algebra. Several reasons to consider the space-time quanta as a 24-cell are discussed. Geometric reasons include its self-duality property and its 24 vertices that may represent the standard model of elementary particles. The 24-cell symmetry group is the Weyl/Coxeter group of the <span></span><math>\u0000 <semantics>\u0000 <msub>\u0000 <mi>F</mi>\u0000 <mn>4</mn>\u0000 </msub>\u0000 <annotation>$F_4$</annotation>\u0000 </semantics></math> group which was found recently to generate the gauge group of the standard model. It is found that 24-cell may provide a geometric interpretation of the mass generation, Avogadro number, color confinement, and the flatness of the observable universe. The phenomenology and consistency with measurements is discussed.</p>","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"72 4","pages":""},"PeriodicalIF":3.9,"publicationDate":"2024-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140034343","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
Particle Dynamics and Matter Accretion onto Non-linear Charged AdS Black Holes in Massive Gravity 大质量引力下非线性带电 AdS 黑洞的粒子动力学与物质吸积
IF 3.9 3区 物理与天体物理
Fortschritte Der Physik-Progress of Physics Pub Date : 2024-02-27 DOI: 10.1002/prop.202300116
Adnan Malik, M. Umair Shahzad
{"title":"Particle Dynamics and Matter Accretion onto Non-linear Charged AdS Black Holes in Massive Gravity","authors":"Adnan Malik,&nbsp;M. Umair Shahzad","doi":"10.1002/prop.202300116","DOIUrl":"10.1002/prop.202300116","url":null,"abstract":"<p>This article investigates the dynamics of charged particles and accretion process around nonlinear charged AdS black holes (BHs). the impact of key factors such as angular momentum, specific energy, and magnetic field on the behavior of particles are focused. Firstly, the concept of the effective potential is examined, which provides insights into the forces acting on particles and the escape velocity they must overcome. The innermost stable circular orbit (ISCO) is also discussed, which is the closest distance a particle can orbit a BH without being pulled in and explore the conditions for particle escape. Next, the energy efficiency and epicyclic frequency of test particles are studied, which measure the amount of energy particle loses due to friction and the frequency of its oscillations, respectively. The accretion processes is analyzed by examining the radial velocity, energy density, and accretion mass of matter falling into the BH. Using the equation of state, how different types of fluid, such as stiff, dust, quintessence and phantom-like dark energy fluid, affect the accretion process near a BH is investigated. Throughout this study, the parameter <span></span><math>\u0000 <semantics>\u0000 <mi>k</mi>\u0000 <annotation>$k$</annotation>\u0000 </semantics></math> plays a key role in shaping the dynamics of particles and accretion systems is found. This parameter <span></span><math>\u0000 <semantics>\u0000 <mi>k</mi>\u0000 <annotation>$k$</annotation>\u0000 </semantics></math> is a measure of the strength of the nonlinear electrodynamics field, and it can have a significant impact on the radius of the ISCO, the energy efficiency of accretion, and other properties. These findings provide new insights into the physics of particle dynamics around nonlinear charged AdS BHs. They could have implications for understanding the behavior of matter in extreme gravitational environments, such as those found near the center of galaxies.</p>","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"72 4","pages":""},"PeriodicalIF":3.9,"publicationDate":"2024-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139988221","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
New Wormhole Solutions in Quadratic f ( Q ) $f(mathcal {Q})$ -Gravity Regime 二次f(Q)引力状态下的新虫洞解决方案
IF 3.9 3区 物理与天体物理
Fortschritte Der Physik-Progress of Physics Pub Date : 2024-02-27 DOI: 10.1002/prop.202300197
Sweeti Kiroriwal, Jitendra Kumar, Sunil Kumar Maurya, Sourav Chaudhary, Abdul Aziz
{"title":"New Wormhole Solutions in Quadratic \u0000 \u0000 \u0000 f\u0000 (\u0000 Q\u0000 )\u0000 \u0000 $f(mathcal {Q})$\u0000 -Gravity Regime","authors":"Sweeti Kiroriwal,&nbsp;Jitendra Kumar,&nbsp;Sunil Kumar Maurya,&nbsp;Sourav Chaudhary,&nbsp;Abdul Aziz","doi":"10.1002/prop.202300197","DOIUrl":"10.1002/prop.202300197","url":null,"abstract":"<p>Nowadays, alternative gravity is a crucial tool for addressing some enduring observational problems, such as the dark universe. Additionally, they can be used to advance the results of general relativity in astrophysics. Wormholes, or imagined passageways through spacetime, have the potential to revolutionize interstellar transport and cosmic interconnection. In the present work, the existence and characteristics of wormhole solutions in the context of the non-linear function 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>$f(mathcal {Q})$</annotation>\u0000 </semantics></math> gravity are investigated. A typical characteristic of maintaining wormholes is the presence of exotic stuff that defines the energy conditions (ECs). The authors looked at the ECs that must be met and analyzed how 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>$f(mathcal {Q})$</annotation>\u0000 </semantics></math> function affects the energy-momentum requirements for maintaining the wormholes open. For a comprehensive understanding of wormhole geometries, we also studied the embedding diagram and volume integral quantifier.</p>","PeriodicalId":55150,"journal":{"name":"Fortschritte Der Physik-Progress of Physics","volume":"72 4","pages":""},"PeriodicalIF":3.9,"publicationDate":"2024-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139980340","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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