International Journal of Theoretical Physics最新文献_第3页

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

引用次数: 0

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

引用次数: 0

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

Categories of Orthosets and Adjointable Maps 正交集和可伴映射的范畴

IF 1.3 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2025-05-27 DOI: 10.1007/s10773-025-06031-4

Jan Paseka, Thomas Vetterlein

{"title":"Categories of Orthosets and Adjointable Maps","authors":"Jan Paseka, Thomas Vetterlein","doi":"10.1007/s10773-025-06031-4","DOIUrl":"10.1007/s10773-025-06031-4","url":null,"abstract":"<div><p>An orthoset is a non-empty set together with a symmetric and irreflexive binary relation <span>(perp )</span>, called the orthogonality relation. An orthoset with 0 is an orthoset augmented with an additional element 0, called falsity, which is orthogonal to every element. The collection of subspaces of a Hilbert space that are spanned by a single vector provides a motivating example. We say that a map <span>(f :X rightarrow Y)</span> between orthosets with 0 possesses the adjoint <span>(g :Y rightarrow X)</span> if, for any <span>(x in X)</span> and <span>(y in Y)</span>, <span>(f(x) perp y)</span> if and only if <span>(x perp g(y))</span>. We call <i>f</i> in this case adjointable. For instance, any bounded linear map between Hilbert spaces induces a map with this property. We discuss in this paper adjointability from several perspectives and we put a particular focus on maps preserving the orthogonality relation. We moreover investigate the category <span>(mathcal{O}mathcal{S})</span> of all orthosets with 0 and adjointable maps between them. We especially focus on the full subcategory <span>(mathcalligra {i}mathcal{O}mathcal{S})</span> of irredundant orthosets with 0. <span>(mathcalligra {i}mathcal{O}mathcal{S})</span> can be made into a dagger category, the dagger of a morphism being its unique adjoint. <span>(mathcalligra {i}mathcal{O}mathcal{S})</span> contains dagger subcategories of various sorts and provides in particular a framework for the investigation of Hilbert spaces.</p></div>","PeriodicalId":597,"journal":{"name":"International Journal of Theoretical Physics","volume":"64 6","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10773-025-06031-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144140191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Spectral Properties of the Zeon Combinatorial Laplacian: Cycles in Finite Graphs Zeon组合拉普拉斯算子的谱性质：有限图中的环

IF 1.3 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2025-05-27 DOI: 10.1007/s10773-025-06032-3

G. Stacey Staples

引用次数: 0

Data-Driven Localized Wave Solutions and Parameters Discovery of the (1+1)-dimensional Ito Integro-Differential Equation （1+1）维Ito积分-微分方程的数据驱动局域波解和参数发现

IF 1.3 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2025-05-26 DOI: 10.1007/s10773-025-06034-1

Yufan Zou, Chuanjian Wang, Mengyao Zhang, Changzhao Li, Hui Fang

{"title":"Data-Driven Localized Wave Solutions and Parameters Discovery of the (1+1)-dimensional Ito Integro-Differential Equation","authors":"Yufan Zou, Chuanjian Wang, Mengyao Zhang, Changzhao Li, Hui Fang","doi":"10.1007/s10773-025-06034-1","DOIUrl":"10.1007/s10773-025-06034-1","url":null,"abstract":"<div><p>In this paper, we investigate the data-driven localized wave solutions and parameters discovery of the (1+1)-dimensional Ito integro-differential equation by using the Potential-Function-Transformation PINNs (PFT-PINNs) method. Firstly, through the introduction of a potential function transformation, we convert the original integro-differential equation into the differential form and simultaneously also reduce the order of the differential equation, which provide convenience in solving the (1+1)-dimensional Ito integro-differential equation by using the PINNs method. Secondly, based on the neural networks, the data-driven localized wave solutions including soliton, breather, rogue wave, fusion and fission solutions are obtained with the aid of the potential function transformation. The results show that the PFT-PINNs method possesses the good performance of PFT-PINNs method in solving the forward problem of the (1+1)-dimensional Ito integro-differential equation and can acquire more accurate localized wave solutions than the standard PINNs method. Finally the PFT-PINNs method is used to solve the inverse problem of the (1+1)-dimensional Ito integro-differential equation and the results demonstrate that the unknown coefficient parameters can be satisfactorily identified even with heavily noisy data.</p></div>","PeriodicalId":597,"journal":{"name":"International Journal of Theoretical Physics","volume":"64 6","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144135384","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