International Journal of Theoretical Physics最新文献

Wald Entropy in Extended Modified Myrzakulov Gravity Theories: (f(R, T, Q, R_{mu nu }T^{mu nu }, R_{mu nu }Q^{mu nu }, dots )) 扩展修正Myrzakulov引力理论中的Wald熵 (f(R, T, Q, R_{mu nu }T^{mu nu }, R_{mu nu }Q^{mu nu }, dots ))

IF 1.7 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2025-10-04 DOI: 10.1007/s10773-025-06143-x

Davood Momeni, Ratbay Myrzakulov

引用次数: 0

Waves, Velocity Addition and Doppler Effect in Light of EPR’s Completeness Condition EPR完备性条件下的波、速度附加和多普勒效应

IF 1.7 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2025-10-04 DOI: 10.1007/s10773-025-06131-1

Abhishek Majhi, Tiyasa Kar

{"title":"Waves, Velocity Addition and Doppler Effect in Light of EPR’s Completeness Condition","authors":"Abhishek Majhi, Tiyasa Kar","doi":"10.1007/s10773-025-06131-1","DOIUrl":"10.1007/s10773-025-06131-1","url":null,"abstract":"<div><p>It is a standard practice to derive velocity addition rules for point particles from Galilean and Lorentz transformations in point (classical) mechanics, and to apply such rules to wave velocities for explaining Doppler effect. However, in such standard practice, it is never shown whether the equation for wave propagation actually transforms in a way such that the velocity addition rules get manifested through the equation itself. We address this gap in the literature as follows. We claim that the <i>velocity addition for waves</i>, being the one and only mean to explain the empirically verified Doppler effect, should be considered as an element of physical reality in accord with EPR’s completeness condition of a physical theory. Therefore, the ‘equation for wave propagation’ should manifest such velocity addition so as to be considered as a part of the respective physical theory of waves. We show that such manifestation is possible if and only if wave propagation is modeled with <i>first order partial differential equations</i>. From a historical point of view, this work settles the Doppler-Petzval debate which originated from Petzval’s demand for an explanation of Doppler effect in terms of differential equations. From the foundational perspective, this work sets the stage for a renewed focus on the mathematical modeling of wave phenomena, especially in the context of various Doppler effects.</p></div>","PeriodicalId":597,"journal":{"name":"International Journal of Theoretical Physics","volume":"64 10","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210632","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

Complex Dynamics in the Simplest Nonlinear RLC Circuit Under Biharmonic Driving: Vibrational Resonance, Chaos and Multistability 最简单非线性RLC电路在双谐波驱动下的复杂动力学：振动共振、混沌和多稳定性

IF 1.7 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2025-10-04 DOI: 10.1007/s10773-025-06162-8

Y. J. F. Kpomahou, R. Gogan, S. J. Dèdèwanou, V. A. Monwanou

{"title":"Complex Dynamics in the Simplest Nonlinear RLC Circuit Under Biharmonic Driving: Vibrational Resonance, Chaos and Multistability","authors":"Y. J. F. Kpomahou, R. Gogan, S. J. Dèdèwanou, V. A. Monwanou","doi":"10.1007/s10773-025-06162-8","DOIUrl":"10.1007/s10773-025-06162-8","url":null,"abstract":"<div><p>This study investigates the vibrational resonance and complex dynamics of a nonpolynomial Van der Pol oscillator driven by biharmonic excitation. This specific class of nonpolynomial oscillators models a nonlinear RLC series circuit where inductance and resistance are current-dependent. Using the method of direct separation of fast and slow motions, we analyze how various system parameters including inertial and impure cubic damping nonlinearities, linear damping, and the frequencies of the biharmonic signals influence the system’s behavior. Our analysis reveals the existence of single and double resonances, showing that parameter variations significantly affect the frequency response amplitude and the critical resonance point. The system’s performance, evaluated by its gain factor, identifies the weak signal frequency as a critical control parameter for signal amplification. The analytical solution is validated through excellent agreement with numerical results. A global analysis of the system’s dynamic changes, performed using a 4th-order Runge-Kutta algorithm, reveals complex behaviors such as periodic, quasiperiodic, and chaotic oscillations, including a notable period-one route to chaos. These behaviors are further confirmed by phase portraits and time series. Furthermore, the system’s sensitivity to initial conditions highlights the coexistence of multiple attractors, a phenomenon validated through bifurcation diagrams, Lyapunov exponents, and phase portraits.</p></div>","PeriodicalId":597,"journal":{"name":"International Journal of Theoretical Physics","volume":"64 10","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210633","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

Solving the Nonlinear Cubic Schrödinger Equation by an Extended Complex Tanh-Function Approach 用扩展复tanh函数法求解非线性三次Schrödinger方程

IF 1.7 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2025-10-03 DOI: 10.1007/s10773-025-06124-0

Yuan-Xi Xie

{"title":"Solving the Nonlinear Cubic Schrödinger Equation by an Extended Complex Tanh-Function Approach","authors":"Yuan-Xi Xie","doi":"10.1007/s10773-025-06124-0","DOIUrl":"10.1007/s10773-025-06124-0","url":null,"abstract":"<div><p>The nonlinear cubic Schrödinger equation not only starts from realistically physical phenomena, but can also be widely used to many physically significant areas such as fluid dynamics, condensed matter physics, plasma physics, quantum mechanics, nonlinear optics and superconductivity. As a consequence, it is a very significant and challenging topic to research the explicit and accurate travelling wave solutions to the nonlinear cubic Schrödinger equation. In this work, based on the ideas of the complex tanh-function method and the extended tanh-function method, an extended complex tanh-function approach is presented for constructing the explicit and accurate travelling wave solutions of nonlinear Schrödinger-type equations. Crucial to our technique is to take full advantage of a complex Riccti equation containing a parameter <i>b</i> and to employ its solutions to replace the tanh function in the complex tanh-function method. It is quite interesting that the sign of the parameter <i>b</i> can be applied to exactly judge the numbers and types of traveling wave solutions. We have illustrated its feasibility by application to the nonlinear cubic Schrödinger equation. As a result, some explicit and accurate travelling wave solutions of the nonlinear cubic Schrödinger equation are successfully investigated in a simple manner. Our approach can not only obtain the all solutions given in Ref [21], but also derive solutions that cannot be seen in Ref [21]. In addition, compared with the proposed approaches in the existing references, the approach described herein appears to be less calculative. Our technique may provide a novel way of thinking for solving nonlinear Schrödinger-type equations. We believe that the procedure used herein may also be applied to explore the explicit and accurate travelling wave solutions of other nonlinear Schrödinger-type equations. We try to generalize this approach to search for the explicit and accurate travelling wave solutions of other ordinary coefficient even variable coefficient nonlinear Schrödinger-type equations.</p></div>","PeriodicalId":597,"journal":{"name":"International Journal of Theoretical Physics","volume":"64 10","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210672","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

Gravitation and Electrodynamics in a Fluid Dynamics Framework 流体动力学框架下的重力和电动力学

IF 1.7 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2025-10-02 DOI: 10.1007/s10773-025-06157-5

Terje Aaberge

引用次数: 0

Monte Carlo Simulations of Hysteresis Properties in Graphene Nanostructures: Comparing Zigzag, Armchair, and Reczag Configurations 石墨烯纳米结构中迟滞特性的蒙特卡罗模拟：比较之字形、扶手椅和Reczag构型

IF 1.7 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2025-09-29 DOI: 10.1007/s10773-025-06118-y

Z. Fadil, Chaitany Jayprakash Raorane, A. Samih, E. Salmani, Khaled H. Mahmoud, Abdulrahman A. Alsayyari, Seong-Cheol Kim

引用次数: 0

Non-Hermitian Supersymmetric Factorization of Harmonic and Kepler-Coulomb Potentials in N-Dimensional Spaces of Constant Curvature 常曲率n维空间中谐波势和开普勒-库仑势的非厄米超对称分解

IF 1.7 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2025-09-27 DOI: 10.1007/s10773-025-06155-7

Allagbé E. Dossou, Finagnon A. Dossa

引用次数: 0

Construction of New Quantum Stabilizer Codes From Quasi-cyclic Codes Of Index Two 从指标2的拟循环码构造新的量子稳定码

IF 1.7 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2025-09-22 DOI: 10.1007/s10773-025-06144-w

Zhuo Li, Zhenhui Zhang, Lijuan Xing

引用次数: 0

On the Teleportation Superiority in Noisy Environments 论噪声环境下隐形传态的优越性

IF 1.7 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2025-09-19 DOI: 10.1007/s10773-025-06108-0

Muhammad Taufiqi, Lila Yuwana, Sithi Vinayakam Muniandy, I Nengah Artawan, Rafika Rahmawati, Bintoro Anang Subagyo, Heru Sukamto, Agus Purwanto

{"title":"On the Teleportation Superiority in Noisy Environments","authors":"Muhammad Taufiqi, Lila Yuwana, Sithi Vinayakam Muniandy, I Nengah Artawan, Rafika Rahmawati, Bintoro Anang Subagyo, Heru Sukamto, Agus Purwanto","doi":"10.1007/s10773-025-06108-0","DOIUrl":"10.1007/s10773-025-06108-0","url":null,"abstract":"<div><p>Quantum teleportation needs a pre-shared entanglement; that entanglement distribution needs a quantum channel connecting the sender and receiver. If the primary goal is quantum state transmission, why not send the state directly instead of using it for entanglement pre-distribution? While quantum teleportation is often considered superior, no work has explicitly shown that superiority. To explore this, we developed a toy model incorporating bit-flip, phase-flip, depolarizing, amplitude-damping, and phase-damping noise. We assumed that the decoherence rate parameters are linearly proportional to distance or time. We calculated the fidelity of the teleported state affected by these noises and compared it to that of direct state transmission, which serves as the benchmark for evaluating teleportation performance. Our results showed that teleportation performs better in distance-dependent scenarios, but not in time-dependent ones. In the latter, teleportation is superior at higher noise parameters but loses its superiority in the lower noise parameters. Lastly, we briefly discuss a physical system that may be compatible with the proposed noise toy model.</p></div>","PeriodicalId":597,"journal":{"name":"International Journal of Theoretical Physics","volume":"64 10","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145078986","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

Qubits Constructed on the Vibrational and Rotational States of Diatomic Molecules 基于双原子分子振动和旋转态的量子比特

IF 1.7 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2025-09-18 DOI: 10.1007/s10773-025-05912-y

Barkat Bouaouina, Mahmoud Merad, Djamal Boudjaadar

{"title":"Qubits Constructed on the Vibrational and Rotational States of Diatomic Molecules","authors":"Barkat Bouaouina, Mahmoud Merad, Djamal Boudjaadar","doi":"10.1007/s10773-025-05912-y","DOIUrl":"10.1007/s10773-025-05912-y","url":null,"abstract":"<div><p>In this work, we study the possibility of using the vibrational and rotational modes of open-shell diatomic molecules as qubits. The candidate molecules are the heterogeneous molecules whose fundamental state is <sup>2</sup>П<sub>1/2</sub> or <sup>2</sup>П<sub>3/2</sub>. The use of the transitions between Λ -doubling states in opposite parity as qubits realized by the control with optimized laser pulses, that serve as logical gates. The optimization of these pulses will be done using the multi-Target Optimal Control Theory (MTOCT). A computer code was created to simulate quantum gates, the results are excellent, the fidelity for each logic gate is optimal with a rate of 99.99%. This verified that the vibrational and rotational qubits of open-shell diatomic molecules are a promising way for the creation of quantum gates and the implementation of quantum algorithms. In this work the controllability of the system from the initial states to the target states and the reversibility of the process are verified, and also the universality of the quantum gates by the use of unique laser for the realization of all quantum gates.</p></div>","PeriodicalId":597,"journal":{"name":"International Journal of Theoretical Physics","volume":"64 10","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145073918","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