Nuclear Physics B最新文献_第9页

Fermat's principle in general relativity via Herglotz variational formalism 通过赫格洛茨变分形式主义研究广义相对论中的费马原理

IF 2.5 3区物理与天体物理

Nuclear Physics B Pub Date : 2024-11-20 DOI: 10.1016/j.nuclphysb.2024.116744

Joanna Piwnik, Joanna Gonera, Piotr Kosiński

引用次数: 0

Solutions of the nonlinear Klein-Gordon equation and the generalized uncertainty principle with the hybrid analytical and numerical method 用混合分析和数值方法求解非线性克莱因-戈登方程和广义不确定性原理

IF 2.5 3区物理与天体物理

Nuclear Physics B Pub Date : 2024-11-19 DOI: 10.1016/j.nuclphysb.2024.116750

Narges Heidari , Marc de Montigny , Ali Ahmadi Azar , Thambiayya Sathiyaraj , Hassan Hassanabadi

引用次数: 0

Role of F(Q,T) gravity with class one space-time in constructing new spherically symmetric stellar solutions 一类时空的 F（Q，T）引力在构建新球面对称恒星解中的作用

IF 2.5 3区物理与天体物理

Nuclear Physics B Pub Date : 2024-11-19 DOI: 10.1016/j.nuclphysb.2024.116745

S.K. Maurya , J. Kumar , S. Chaudhary , A. Errehymy , O. Donmez , K. Myrzakulov

{"title":"Role of F(Q,T) gravity with class one space-time in constructing new spherically symmetric stellar solutions","authors":"S.K. Maurya , J. Kumar , S. Chaudhary , A. Errehymy , O. Donmez , K. Myrzakulov","doi":"10.1016/j.nuclphysb.2024.116745","DOIUrl":"10.1016/j.nuclphysb.2024.116745","url":null,"abstract":"<div><div>This paper aims to investigate the possibility of generating exact solutions for appropriate anisotropic spherically symmetric systems in <span><math><mi>F</mi><mo>(</mo><mi>Q</mi><mo>,</mo><mi>T</mi><mo>)</mo></math></span> gravity where <span><math><mi>Q</mi></math></span> and <span><math><mi>T</mi></math></span> are non-metricity and the trace of the energy-momentum tensor respectively. These solutions involve embedding a spherically symmetric static metric into a five-dimensional pseudo-Euclidean space. To solve Einstein's field equations and ensure that the solution is free of center singularities, a physically plausible selection of the metric coefficient <span><math><msub><mrow><mi>g</mi></mrow><mrow><mi>r</mi><mi>r</mi></mrow></msub></math></span> is used. With the help of the Karmarkar condition, we compute the <span><math><msub><mrow><mi>g</mi></mrow><mrow><mi>t</mi><mi>t</mi></mrow></msub></math></span> component of the metric tensor using the metric coefficient <span><math><msub><mrow><mi>g</mi></mrow><mrow><mi>r</mi><mi>r</mi></mrow></msub></math></span>. At the boundary of the compact star, we match interior spacetime with the exterior spacetime to find the values of unknown constants. To make the solution match the measured mass and radius, we have tuned up the solution for compact star PSRJ1614-220. The behavior of the solution has been thoroughly examined for the same star. By examining the necessary physical characteristics, such as energy conditions, causality condition, hydrostatic equilibrium, pressure-density ratio, Herera Cracking criterion, etc., the physical acceptability of the model in the context of <span><math><mi>F</mi><mo>(</mo><mi>Q</mi><mo>,</mo><mi>T</mi><mo>)</mo></math></span> has been investigated. It is observed that the present solution allows viable modeling of stellar objects in <span><math><mi>F</mi><mo>(</mo><mi>Q</mi><mo>,</mo><mi>T</mi><mo>)</mo></math></span> gravity.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1010 ","pages":"Article 116745"},"PeriodicalIF":2.5,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142698605","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

Thick brane in mimetic-like gravity 拟态引力中的厚布伦

IF 2.5 3区物理与天体物理

Nuclear Physics B Pub Date : 2024-11-19 DOI: 10.1016/j.nuclphysb.2024.116747

C.A.S. Almeida , F.C.E. Lima , S.S. Mishra , Gonzalo J. Olmo , P.K. Sahoo

引用次数: 0

Triple critical point and emerging temperature scales in SU(N) ferromagnetism at large N 大 N 条件下 SU(N) 铁磁性的三临界点和新出现的温度尺度

IF 2.5 3区物理与天体物理

Nuclear Physics B Pub Date : 2024-11-19 DOI: 10.1016/j.nuclphysb.2024.116748

Alexios P. Polychronakos , Konstantinos Sfetsos

{"title":"Triple critical point and emerging temperature scales in SU(N) ferromagnetism at large N","authors":"Alexios P. Polychronakos , Konstantinos Sfetsos","doi":"10.1016/j.nuclphysb.2024.116748","DOIUrl":"10.1016/j.nuclphysb.2024.116748","url":null,"abstract":"<div><div>The non-Abelian ferromagnet recently introduced by the authors, consisting of atoms in the fundamental representation of <span><math><mi>S</mi><mi>U</mi><mo>(</mo><mi>N</mi><mo>)</mo></math></span>, is studied in the limit where <em>N</em> becomes large and scales as the square root of the number of atoms <em>n</em>. This model exhibits additional phases, as well as two different temperature scales related by a factor <span><math><mi>N</mi><mo>/</mo><mi>ln</mi><mo>⁡</mo><mi>N</mi></math></span>. The paramagnetic phase splits into a “dense” and a “dilute” phase, separated by a third-order transition and leading to a triple critical point in the scale parameter <span><math><mi>n</mi><mo>/</mo><msup><mrow><mi>N</mi></mrow><mrow><mn>2</mn></mrow></msup></math></span> and the temperature, while the ferromagnetic phase exhibits additional structure, and a new paramagnetic-ferromagnetic metastable phase appears at the larger temperature scale. These phases can coexist, becoming stable or metastable as temperature varies. A generalized model in which the number of <span><math><mi>S</mi><mi>U</mi><mo>(</mo><mi>N</mi><mo>)</mo></math></span>-equivalent states enters the partition function with a nontrivial weight, relevant, e.g., when there is gauge invariance in the system, is also studied and shown to manifest similar phases, the dense-dilute phase transition becoming second-order in the fully gauge invariant case.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1009 ","pages":"Article 116748"},"PeriodicalIF":2.5,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142698714","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 factorization hierarchy of equations for banana Feynman integrals 论香蕉费曼积分方程的因式分解层次结构

IF 2.5 3区物理与天体物理

Nuclear Physics B Pub Date : 2024-11-19 DOI: 10.1016/j.nuclphysb.2024.116746

V. Mishnyakov , A. Morozov , M. Reva

引用次数: 0

A note on the large-c conformal block asymptotics and α-heavy operators 关于大 C 保角块渐近和 α 重算子的说明

IF 2.5 3区物理与天体物理

Nuclear Physics B Pub Date : 2024-11-17 DOI: 10.1016/j.nuclphysb.2024.116741

Konstantin Alkalaev , Pavel Litvinov

{"title":"A note on the large-c conformal block asymptotics and α-heavy operators","authors":"Konstantin Alkalaev , Pavel Litvinov","doi":"10.1016/j.nuclphysb.2024.116741","DOIUrl":"10.1016/j.nuclphysb.2024.116741","url":null,"abstract":"<div><div>We consider <em>α</em>-heavy conformal operators in CFT<sub>2</sub> which dimensions grow as <span><math><mi>h</mi><mo>=</mo><mi>O</mi><mo>(</mo><msup><mrow><mi>c</mi></mrow><mrow><mi>α</mi></mrow></msup><mo>)</mo></math></span> with <em>α</em> being non-negative rational number and conjecture that the large-<em>c</em> asymptotics of the respective 4-point Virasoro conformal block is exponentiated similar to the standard case of <span><math><mi>α</mi><mo>=</mo><mn>1</mn></math></span>. It is shown that the leading exponent is given by a Puiseux polynomial which is a linear combination of power functions in the central charge with fractional powers decreasing from <em>α</em> to 0 according to some pattern. Our analysis is limited by considering the first six explicit coefficients of the Virasoro block function in the coordinate. For simplicity, external primary operators are chosen to be of equal conformal dimensions that, therefore, includes the case of the vacuum conformal block. The consideration is also extended to the 4-point <span><math><msub><mrow><mi>W</mi></mrow><mrow><mn>3</mn></mrow></msub></math></span> conformal block of four semi-degenerate operators, in which case the exponentiation hypothesis works the same way. Here, only the first three block coefficients can be treated analytically.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1009 ","pages":"Article 116741"},"PeriodicalIF":2.5,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142698711","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

Factorization of rational six vertex model partition functions 有理六顶点模型分区函数的因式分解

IF 2.5 3区物理与天体物理

Nuclear Physics B Pub Date : 2024-11-17 DOI: 10.1016/j.nuclphysb.2024.116743

Kohei Motegi

引用次数: 0

Mixed single, double, and triple poles solutions for the space-time shifted nonlocal DNLS equation with nonzero boundary conditions via Riemann–Hilbert approach 通过黎曼-希尔伯特方法求解具有非零边界条件的时空偏移非局部 DNLS 方程的混合单、双和三极解

IF 2.5 3区物理与天体物理

Nuclear Physics B Pub Date : 2024-11-14 DOI: 10.1016/j.nuclphysb.2024.116742

Xin-Yu Liu, Rui Guo

{"title":"Mixed single, double, and triple poles solutions for the space-time shifted nonlocal DNLS equation with nonzero boundary conditions via Riemann–Hilbert approach","authors":"Xin-Yu Liu, Rui Guo","doi":"10.1016/j.nuclphysb.2024.116742","DOIUrl":"10.1016/j.nuclphysb.2024.116742","url":null,"abstract":"<div><div>In this paper, we investigate the space-time shifted nonlocal derivative nonlinear Schrödinger (DNLS) equation under nonzero boundary conditions using the Riemann–Hilbert (RH) approach for the first time. To begin with, in the direct scattering problem, we analyze the analyticity, symmetries, and asymptotic behaviors of the Jost eigenfunctions and scattering matrix functions. Subsequently, we examine the coexistence of <em>N</em>-single, <em>N</em>-double, and <em>N</em>-triple poles in the inverse scattering problem. The corresponding residue conditions, trace formulae, <em>θ</em> condition, and symmetry relations of the norming constants are obtained. Moreover, we derive the exact expression for the mixed single, double, and triple poles solutions with the reflectionless potentials by solving the relevant RH problem associated with the space-time shifted nonlocal DNLS equation. Furthermore, to further explore the remarkable characteristics of soliton solutions, we graphically illustrate the dynamic behaviors of several representative solutions, such as three-soliton, two-breather, and soliton-breather solutions. Finally, we analyze the effects of shift parameters through graphical simulations.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1009 ","pages":"Article 116742"},"PeriodicalIF":2.5,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142660916","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

Mathematical formalism of Joule-Thomson process for ADS-RN black hole coupled with non-linear electrodynamics field 与非线性电动力学场耦合的 ADS-RN 黑洞焦耳-汤姆逊过程的数学形式主义

IF 2.5 3区物理与天体物理

Nuclear Physics B Pub Date : 2024-11-14 DOI: 10.1016/j.nuclphysb.2024.116735

R.H. Ali , G. Abbas , Abdul Jawad , Badr S. Alkahtani , G. Mustafa

引用次数: 0