International Journal of Theoretical Physics最新文献_第5页

Comparative Analysis of Preinvexity, Pseudo-Convexity, and Quasi-Convexity on Fractal Sets 分形集上的前凸性、伪凸性和拟凸性的比较分析

IF 1.7 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2025-08-27 DOI: 10.1007/s10773-025-06114-2

Pagdame Tiebekabe, V. A. Monwanou, C. H. Miwadinou

引用次数: 0

Higher-Order Fermi–Walker Transport Dynamics and the Induced Geometric Phase 高阶费米-沃克输运动力学和诱导几何相位

IF 1.7 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2025-08-25 DOI: 10.1007/s10773-025-06099-y

Rıdvan Cem Demirkol

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Traveling wave solutions with modulation instability of coupled nonlinear Schrödinger equations via two analytical approaches 用两种解析方法求解耦合非线性Schrödinger方程的调制不稳定性行波

IF 1.7 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2025-08-20 DOI: 10.1007/s10773-025-06092-5

Nauman Raza, Saima Arshed, Muhammad Haider Ali Asghar

{"title":"Traveling wave solutions with modulation instability of coupled nonlinear Schrödinger equations via two analytical approaches","authors":"Nauman Raza, Saima Arshed, Muhammad Haider Ali Asghar","doi":"10.1007/s10773-025-06092-5","DOIUrl":"10.1007/s10773-025-06092-5","url":null,"abstract":"<div><p>This paper investigates the soliton pulses of various kinds and their behavior as they traverse a birefringent optical fiber. Coupled nonlinear Schrödinger equations (CNLSEs) is a nonlinear model to describe light propagation within these fibers that accounts for coherent and incoherent nonlinear coupling phenomena. In particular, this study investigates several optical solitons subjected to third-order nonlinearity and group-velocity dispersion, which is physically significant regarding elliptical core optical fiber. This paper offers dark, bright, singular, periodic, and periodic-singular solitons to CNLSEs by employing the <span>(phi ^6)</span>-expansion technique and the <span>(G'/(bG'+G+a))</span>-expansion technique. It also provides 2D and 3D graphical illustrations of these solutions using fixed parameter values to showcase their physical significance. The modulation instability of the proposed model is also examined in this paper. The methods used are more accessible, effective, and computationally efficient. These methods can be applied to tackle complex problems obtained in mathematical physics, engineering, and optical fiber technology.</p></div>","PeriodicalId":597,"journal":{"name":"International Journal of Theoretical Physics","volume":"64 9","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144868818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

On Obtaining New MUBs by Finding Points on Complete Intersection Varieties over (mathbb {R}) 关于在上的完全交变种上找点获得新的mub (mathbb {R})

IF 1.7 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2025-08-19 DOI: 10.1007/s10773-025-06094-3

Arindam Banerjee, Kanoy Kumar Das, Ajeet Kumar, Rakesh Kumar, Subhamoy Maitra

引用次数: 0

Entanglement and Steering of Three-Mode Field in Trio Coherent States 三相干态中三模场的纠缠与导向

IF 1.7 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2025-08-18 DOI: 10.1007/s10773-025-06072-9

Ahmed A. Zahia, Eied Khalil, S. Al-Awfi

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Soliton and Lump Solutions of a (3+1)-dimensional Generalized B-type Kadomtsev-Petviashvili Equation in Fluid Mechanics 流体力学中（3+1）维广义b型Kadomtsev-Petviashvili方程的孤子解和块解

IF 1.7 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2025-08-16 DOI: 10.1007/s10773-025-06097-0

Zi-Yu Zhang, Da-Wei Zuo

{"title":"Soliton and Lump Solutions of a (3+1)-dimensional Generalized B-type Kadomtsev-Petviashvili Equation in Fluid Mechanics","authors":"Zi-Yu Zhang, Da-Wei Zuo","doi":"10.1007/s10773-025-06097-0","DOIUrl":"10.1007/s10773-025-06097-0","url":null,"abstract":"<div><p>In this paper, we investigate the soliton and lump solutions of a (3+1)-dimensional generalized B-type Kadomtsev-Petviashvili equation in fluid mechanics. Through logarithmic transformation, we derive its bilinear form. Via the bilinear equation, both first-order and second-order soliton solutions of this eqaution are constructed. Furthermore, semi-rational solutions of this equation are obtained via Gram determinant approach. Specifically, lump chains and lump-kink solutions of this equation are successfully derived. The analytical results reveal that solitary waves propagate at constant velocities with their amplitudes and velocities exhibiting a proportional relationship. This implies that adjustments to the parameters will concurrently affect both the propagation velocity and amplitude of solitary waves. By employing contour figures and auxiliary lines, the periods and propagation velocities of lump chains and lump-kink waves are systematically computed. Notably, as the parameter <i>N</i> (the order of these solutions) increases, phenomena of fusion or fission emerge among these nonlinear waves. Additionally, by adjusting parameter, distinct types of lump waves can be observed that propagate along with the coordinate axes.</p></div>","PeriodicalId":597,"journal":{"name":"International Journal of Theoretical Physics","volume":"64 9","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144853667","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Improving the Successful Probability of Quantum Dense Coding Through Bit Flip Channels Using Auxiliary Particles 利用辅助粒子提高位翻转信道量子密集编码的成功率

IF 1.7 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2025-08-11 DOI: 10.1007/s10773-025-06093-4

Bingbing Luo, Jiahua Wei, Zhiqiang Ma, Haoran Hu, Zhen Ren, Ya Wang, Lei Shi

引用次数: 0

The Heat Capacity of a Diatomic Gas at High Temperatures 双原子气体在高温下的热容

IF 1.7 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2025-08-11 DOI: 10.1007/s10773-025-06095-2

Ji-Xuan Hou

{"title":"The Heat Capacity of a Diatomic Gas at High Temperatures","authors":"Ji-Xuan Hou","doi":"10.1007/s10773-025-06095-2","DOIUrl":"10.1007/s10773-025-06095-2","url":null,"abstract":"<div><p>while the <span>(frac{7}{2})</span> plateau is a key theoretical prediction of the equipartition theorem, real-world experiments cannot provide an unambiguous observation on this plateau. This discrepancy underscores the necessity of classical statistical mechanics in explaining thermal behavior. In this paper, we model the diatomic molecule as a stretchable dumbbell, and calculate the partition function and thermodynamic quantities of this model. Our calculation shows that the rotational modes and the vibrational mode cannot be decoupled completely and the equipartition theorem becomes not applicable anymore. For a diatomic molecule with a harmonic interaction between the two atoms, our calculation shows that the heat capacity should reach a <span>(frac{9}{2})</span> plateau instead of the <span>(frac{7}{2})</span> plateau. The height of the plateau can be shifted by the anharmonicity in the potential. Moreover, simulations are performed on our diatomic model by using the Monte Carlo Metropolis algorithm. The Monte Carlo simulations reveal that replacing the interatomic potential with the more realistic Morse potential leads to a heat capacity plateau value higher than <span>(frac{9}{2})</span>, with the plateau increasing as the dissociation energy of the diatomic molecule decreases.</p></div>","PeriodicalId":597,"journal":{"name":"International Journal of Theoretical Physics","volume":"64 8","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144810967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Leptonic Decay Widths of Vector Charmonia in the Framework of Bethe-Salpeter Equation Bethe-Salpeter方程框架下矢量调和的轻子衰减宽度

IF 1.7 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2025-08-08 DOI: 10.1007/s10773-025-06086-3

Akshita Sharma, Shashank Bhatnagar

引用次数: 0

Preons, Braid Topology, and Representations of Fundamental Particles Preons，辫状拓扑和基本粒子的表示

IF 1.7 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2025-08-08 DOI: 10.1007/s10773-025-06087-2

David Chester, Xerxes D. Arsiwalla, Louis H. Kauffman

{"title":"Preons, Braid Topology, and Representations of Fundamental Particles","authors":"David Chester, Xerxes D. Arsiwalla, Louis H. Kauffman","doi":"10.1007/s10773-025-06087-2","DOIUrl":"10.1007/s10773-025-06087-2","url":null,"abstract":"<div><p>In particle phenomenology, preon models study compositional rules of standard model interactions. In spite of empirical success, mathematical underpinnings of preon models in terms of group representation theory have not been fully worked out. Here, we address this issue while clarifying the relation between different preon models. In particular, we focus on two prominent models: Bilson-Thompson’s helon model and Lambek’s 4-vector model. We determine the mapping between helon model particle states and representation theory of Lie algebras. Braided ribbon diagrams of the former represent on-shell states of spinors of the Lorentz group. Braids correspond to chirality, and twists, to charges. We note that this model captures only the <span>(SU(3)_ctimes U(1)_{em})</span> sector of the standard model. We then map the twists of helon diagrams to the weight polytope of <span>(SU(3)_c times U(1)_{em})</span>. The braid structure maps to chiral states of fermions. We also show that Lambek’s 4-vector can be recovered from helon diagrams. Alongside, we introduce a new 5-vector representation derived from the weight lattice. This representation contains both the correct interactions found in 4-vectors and the inclusion of chirality found in helons. Additionally, we demonstrate topological analogues of CPT transformations in helon diagrams. The braid diagrams of the helon model are the only ones that are self-consistent with CPT invariance. In contrast to field-theoretic approaches, the compositional character of preon models offers an analogous particle-centric perspective on fundamental interactions.</p></div>","PeriodicalId":597,"journal":{"name":"International Journal of Theoretical Physics","volume":"64 8","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145163597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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