International Journal of Theoretical Physics最新文献_第2页

Generalized Almost (eta )-Ricci Solitons on Spacetimes 广义几乎(eta ) -时空上的里奇孤子

IF 1.7 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2026-04-29 DOI: 10.1007/s10773-026-06340-2

Mehdi Jafari, Shahroud Azami, Uday Chand De

引用次数: 0

Integrable Maxwellian Evolution and Geometric Phases in Multiplicative Euclidean Space 乘法欧几里得空间中的可积麦克斯韦演化与几何相位

IF 1.7 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2026-04-29 DOI: 10.1007/s10773-026-06342-0

Ebru Yanık, Hazal Ceyhan, Zehra Özdemir

{"title":"Integrable Maxwellian Evolution and Geometric Phases in Multiplicative Euclidean Space","authors":"Ebru Yanık, Hazal Ceyhan, Zehra Özdemir","doi":"10.1007/s10773-026-06342-0","DOIUrl":"10.1007/s10773-026-06342-0","url":null,"abstract":"<div><p>This study investigates the geometric dynamics of electromagnetic wave propagation along optical fibers within a non-Newtonian (multiplicative) differential geometry framework. Modeling the optical fiber as a space curve in multiplicative Euclidean 3-space, we construct a specialized anholonomic coordinate system associated with the multiplicative Frenet frame. Within this setup, we reformulate Maxwell’s equations to derive a novel set of Maxwellian curve evolution equations. We rigorously analyze the polarization evolution of the electric and magnetic fields, establishing explicit relationships between the non-Newtonian Berry phase, Rytov parallel transport, and Fermi-Walker transport laws in both the normal (<span>(nu )</span>) and binormal (<span>(beta )</span>) directions. Furthermore, we demonstrate that the derived evolution equations satisfy the Mainardi-Gauss-Codazzi-type compatibility conditions. This geometric formulation reveals a deep intrinsic connection between electromagnetic wave propagation and integrable systems, as exemplified by the emergence of the sine-Gordon equation and the Dini surface geometry in the context of constant negative curvature.</p></div>","PeriodicalId":597,"journal":{"name":"International Journal of Theoretical Physics","volume":"65 5","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147797017","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

Magnon-Atom Entanglement in a Hybrid Magnomechanical System 混合磁机械系统中的磁子-原子纠缠

IF 1.7 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2026-04-28 DOI: 10.1007/s10773-025-06202-3

Muhammad Muneeb, Zainab Khalid, Muhammad Atif Nawaz, Khalid Naseer, Amjad Sohail Shah

引用次数: 0

Stability and Memory Modulation in Non-Markovian Quantum Dynamics under Quantum-Deformed Fractional Memory 量子变形分数记忆下非马尔可夫量子动力学的稳定性和记忆调制

IF 1.7 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2026-04-27 DOI: 10.1007/s10773-026-06337-x

Rabha W. Ibrahim, Dumitru Baleanu, Soheil Salahshour

引用次数: 0

Operational Reconstruction of Feynman Rules for Quantum Amplitudes via Composition Algebras 基于复合代数的量子振幅的Feynman规则的运算重建

IF 1.7 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2026-04-23 DOI: 10.1007/s10773-026-06330-4

Jens Köplinger, Michael Habeck, Philip Goyal

引用次数: 0

Mean Field Analysis of Four Spin Interaction: A toy Model 四自旋相互作用的平均场分析：一个玩具模型

IF 1.7 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2026-04-22 DOI: 10.1007/s10773-026-06333-1

Debnarayan Jana

引用次数: 0

Entanglement Enhancement in an Electro-Optomechanical System via an Auxiliary Cavity and Optical Parametric Amplification 利用辅助腔和光参量放大增强电光机械系统中的纠缠

IF 1.7 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2026-04-21 DOI: 10.1007/s10773-026-06335-z

F. Essaadi, Y. Oussarhan, F. Omari, S. Mouslih, M. Jakha, M. Ouhammou, B. Manaut, S. Taj

{"title":"Entanglement Enhancement in an Electro-Optomechanical System via an Auxiliary Cavity and Optical Parametric Amplification","authors":"F. Essaadi, Y. Oussarhan, F. Omari, S. Mouslih, M. Jakha, M. Ouhammou, B. Manaut, S. Taj","doi":"10.1007/s10773-026-06335-z","DOIUrl":"10.1007/s10773-026-06335-z","url":null,"abstract":"<div><p>We theoretically study the enhancement of quantum entanglement in a hybrid electro-optomechanical system consisting of a main optomechanical cavity and an auxiliary optical cavity. The two optical modes are coupled through photon-hopping interaction, whereas the two nanomechanical oscillators, by means of tunable Coulomb interaction. An optical parametric amplifier is also provided in the auxiliary cavity for nonlinear gain and phase control. We solve the linearized quantum Langevin equations and use the formalism of covariance matrix to quantify bipartite entanglement between different subsystems using logarithmic negativity. According to our results, the photon-hopping coupling indeed enhances the entanglement between these mechanical oscillators and makes it more resistant against thermal-decoherence so that this entanglement persists up to higher temperatures. We prove that the Coulomb interaction is a necessary condition for mechanical entanglement in which its strength <span>(lambda )</span> determines how correlated the system becomes. Additionally, we show that the optical parametric amplifier is a powerful tool for phase-sensitive boosting of mechanical entanglement as well as crucially enabling entanglement between the two optical modes which would otherwise be missing. However, this improvement is compensated by the shrinking of the stable parameters region. This work provides a general and flexible approach towards the manipulation of quantum correlations via the interplay between Coulomb interaction, photon hopping, and parametric amplification with applications in quantum information processing and sensing.</p></div>","PeriodicalId":597,"journal":{"name":"International Journal of Theoretical Physics","volume":"65 5","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147738278","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

Entanglement and Atomic Inversion in the Presence of Two-Photon Transitions, Dipole-Dipole Interaction and Counter Rotating Terms 双光子跃迁、偶极-偶极相互作用和逆旋转项下的纠缠和原子反转

IF 1.7 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2026-04-21 DOI: 10.1007/s10773-026-06302-8

N. Asili Firouzabadi, M. K. Tavassoly

{"title":"Entanglement and Atomic Inversion in the Presence of Two-Photon Transitions, Dipole-Dipole Interaction and Counter Rotating Terms","authors":"N. Asili Firouzabadi, M. K. Tavassoly","doi":"10.1007/s10773-026-06302-8","DOIUrl":"10.1007/s10773-026-06302-8","url":null,"abstract":"<div><p>It is well-known that the rotating wave approximation (RWA) is valid in the weak coupling regimes in atom-field interaction, while counter rotating terms (CRTs) cannot be ignored in the strong coupling regimes. It is also approved that, considering CRTs is equivalent to the presence of a typical nonlinearity function in the atom-field interaction Hamiltonian, which makes it possible to achieve a solution for the dynamical system. With these considerations, in this paper, using the perturbation theory and the nonlinear coherent state approach, we first intend to solve the Hamiltonian interaction between a two-mode field with two qubits (two-level atoms) in a high-quality cavity, while the two-photon atomic transitions are allowed and CRTs are taken into account. We then solve the time-dependent Schrödinger (TDSh) equation with special initial conditions for the considered model, wherein the dipole-dipole interaction (D-DI) is also considered. In the continuation, concurrence (atomic population inversion), as a suitable measure for the amount of entanglement between the two qubits (energy exchange between atoms and field) is evaluated, numerically. At the same time, we examine the effect of CRTs and D-DI (as well as other related parameters involved in the model interaction) on these quantities. Our results show that, CRT and D-DI obviously change the entanglement and atomic population inversion patterns, however, the same maximum values of entanglement and favorable patterns of atomic inversion may still be achieved, depending on the chosen initial atom-field conditions.</p></div>","PeriodicalId":597,"journal":{"name":"International Journal of Theoretical Physics","volume":"65 5","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147738146","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

Diverse Interaction Structures and Complex Wave Dynamics in the Generalized Hirota–Satsuma–Ito Equation 广义hirota - satsumo - ito方程中的多种相互作用结构和复杂波动动力学

IF 1.7 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2026-04-20 DOI: 10.1007/s10773-026-06332-2

Jinxin Wu, Junjie Li, Chuyu Huang, Yan Zhu, Xiaohui Sun, Runfa Zhang

{"title":"Diverse Interaction Structures and Complex Wave Dynamics in the Generalized Hirota–Satsuma–Ito Equation","authors":"Jinxin Wu, Junjie Li, Chuyu Huang, Yan Zhu, Xiaohui Sun, Runfa Zhang","doi":"10.1007/s10773-026-06332-2","DOIUrl":"10.1007/s10773-026-06332-2","url":null,"abstract":"<div><p>This paper presents a training-free symbolic bilinear framework that couples Hirota’s bilinear method with bilinear-neural-network–inspired ansatz construction to derive exact wave solutions of the generalized (2+1)-dimensional Hirota–Satsuma–Ito (GHSI) equation. By extending the conventional linear neuron inputs to composite and partially nonlinear activation designs within both single- and dual-hidden-layer topologies, the proposed workflow systematically enlarges the trial-function space while keeping all parameters solvable through symbolic computation. As a result, we obtain several new families of hybrid interaction waves, including lump–two-kink interactions and periodic–kink interaction waves (with purely periodic and purely kink patterns arising as limiting cases), as well as richer lump–stripe interaction scenarios. The framework further reconstructs the standard Hirota N-soliton solution in a unified form and provides explicit examples for N=2, 3, 4, illustrating typical elastic interaction features via spatiotemporal visualizations. To interpret the irregular multi-scale modulation observed in representative patterns, we also perform a Duffing-type diagnostic on extracted solution time series and report chaos-like phase-portrait behavior at the solution level. These results enrich the solution library of the GHSI model and offer a systematic route for exploring complex nonlinear wave events relevant to shallow-water and coastal-wave dynamics.</p></div>","PeriodicalId":597,"journal":{"name":"International Journal of Theoretical Physics","volume":"65 5","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147738480","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

Lie Symmetry Analysis and Conservation Laws of the Time-Fractional Relativistic Vlasov-Maxwell Equation in Kinetic Plasma 动力学等离子体中时间分数相对论Vlasov-Maxwell方程的Lie对称性分析和守恒定律

IF 1.7 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2026-04-17 DOI: 10.1007/s10773-026-06328-y

Sourav Das, Debjit Dutta

引用次数: 0