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

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

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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

Role of Heisenberg’s Uncertainty Principle in Dynamical Reheating of the Primordial Universe 海森堡测不准原理在原始宇宙动态再加热中的作用

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/s10773-025-06141-z

Bhargabi Saha, Malay K. Nandy

{"title":"Role of Heisenberg’s Uncertainty Principle in Dynamical Reheating of the Primordial Universe","authors":"Bhargabi Saha, Malay K. Nandy","doi":"10.1007/s10773-025-06141-z","DOIUrl":"10.1007/s10773-025-06141-z","url":null,"abstract":"<div><p>In this work, we present a novel approach for studying the inflationary and reheating stages of the early universe by incorporating a quantum-mechanical constraint on radiation production, derived from the Heisenberg uncertainty principle. This constraint provides a fundamental upper bound on the rate at which radiation energy density can be generated, offering a novel framework for examining the efficiency and dynamics of energy transfer from the inflaton field to radiation. With this setup, we formulate a system of coupled, nonlinear differential equations that govern the depletion of inflaton energy, the growth of radiation, and the dynamics of cosmic expansion, ensuring consistency with exact energy conservation and accounting for backreaction from radiation production. Solving this nonlinear system numerically with initial conditions that satisfy the slow-roll criteria for 60 e-folds of inflation, we find that radiation production begins even during the inflationary phase and increases significantly afterwards. The reheating process is found to satisfy the Kofman-Yi criterion for successful reheating, with nearly all inflaton energy converted into radiation, reaching a peak radiation energy density, corresponding to a reheating temperature of <span>(T_r=2.38times 10^{13})</span> GeV. The evolution culminates in a dynamically smooth transition, a <i>graceful exit</i>, from inflation to a hot radiation-dominated Universe. Although we employ the quadratic potential to illustrate the significance of the approach, the methodology is generally applicable and can be adapted to observationally favored inflationary models.</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":"145073919","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

Expectation Value Dynamics Within Real Hilbert Space Quantum Mechanics 真实希尔伯特空间量子力学中的期望值动力学

IF 1.7 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2025-09-17 DOI: 10.1007/s10773-025-06111-5

Sergio Giardino

引用次数: 0

Behaviour of Universe with Finsler-Modified Randers Cosmological Model in Lyra Theory 天琴座理论中修正的finsler - Randers宇宙学模型中的宇宙行为

IF 1.7 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2025-09-17 DOI: 10.1007/s10773-025-06109-z

Sachin Kumar, P. K. Dwivedi, C. K. Mishra

{"title":"Behaviour of Universe with Finsler-Modified Randers Cosmological Model in Lyra Theory","authors":"Sachin Kumar, P. K. Dwivedi, C. K. Mishra","doi":"10.1007/s10773-025-06109-z","DOIUrl":"10.1007/s10773-025-06109-z","url":null,"abstract":"<div><p>In this manuscript, we have considered the Finsler-Modified Randers Cosmological Model (FMRCM) with cosmological constant <span>(Lambda)</span> for generalized Finsler-Randers space-time, to investigate the solutions of this model in Lyra theory with Bianchi type-<span>(IV_0)</span> model of universe of cosmology under different variations of energy conditions such as the null, weak, dominant and strong energy condition with cosmological constant. Further, we have analyzed the role of cosmological constant <span>(Lambda)</span> in various framework, exploring its impact on both the accelerating and decelerating phases of cosmic expansion. Additionally, we have showed that for <span>(Lambda = 3K)</span> where <span>(K>0)</span> is any real number, the null, weak, and dominant energy conditions with cosmological constant are satisfied while the strong energy condition with cosmological constant is violated. This violation is interpreted as the cause of the accelerated expansion of the universe, but for <span>(Lambda = -3K)</span>, all energy conditions are satisfied, indicating no evidence of cosmic acceleration. These results are supported through both graphical and geometrical analysis.</p></div>","PeriodicalId":597,"journal":{"name":"International Journal of Theoretical Physics","volume":"64 10","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145073644","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

Supersymmetric Quantum Mechanics Approach to Unified Treatment of the Non-Relativistic Harmonic Oscillator and the Klein-Gordon Oscillator Subject to a Uniform Magnetic Field in the Framework of Snyder-de Sitter Algebra 在Snyder-de Sitter代数框架下非相对论谐振子和受均匀磁场影响的Klein-Gordon振子的统一处理的超对称量子力学方法

IF 1.7 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2025-09-17 DOI: 10.1007/s10773-025-06117-z

Abdelkader Saidani, Farid Benamira

引用次数: 0

Intrinsic Decoherence-Induced Generation of Quantum Information Resources in Coupled Semiconductor Charge Qubits 耦合半导体电荷量子比特中本征退相干诱导的量子信息资源的产生

IF 1.7 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2025-09-17 DOI: 10.1007/s10773-025-06134-y

F. Benabdallah, H. Allhibi, A.-B. A. Mohamed, M. Daoud

{"title":"Intrinsic Decoherence-Induced Generation of Quantum Information Resources in Coupled Semiconductor Charge Qubits","authors":"F. Benabdallah, H. Allhibi, A.-B. A. Mohamed, M. Daoud","doi":"10.1007/s10773-025-06134-y","DOIUrl":"10.1007/s10773-025-06134-y","url":null,"abstract":"<div><p>The preservation of non-classical correlation resources requires optimal procedures, strategies, and the proper design of the transmitting channels. In this scenario, we explore the dynamics of quantum correlations, namely local quantum Fisher information (LQFI) and concurrence, in a system of two strongly coupled semiconductor charge qubits confined in semiconductor pair quantum dots (SPQDs). The effects of tunneling, detuning, and dipole-dipole interactions are considered in both the absence and presence of intrinsic decoherence. Our results show that these interactions play a crucial role in transforming initially separable states into correlated states. Strengthening the tunneling coupling enhances the generation of semi-regular maximal two-qubit correlations. Increasing the detuning weakens both LQFI and concurrence, while strong dipole-dipole interactions mitigate decoherence-induced degradation and stabilize the quantum coherence. As decoherence increases, the amplitudes and frequencies of the correlations decrease, leading to sudden birth- death and sudden change phenomena. Notably, the robustness of LQFI against decoherence suggests its potential applications in quantum metrology. The two-qubit coherence induced by dipole interactions can be preserved against decoherence effects by increasing the tunneling coupling, providing an optimized framework for solid-state quantum information processing.</p></div>","PeriodicalId":597,"journal":{"name":"International Journal of Theoretical Physics","volume":"64 10","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145073649","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

Information-Theoretic Analysis of a Mass-Dependent Minimal Length Quantum Harmonic Oscillator 质量相关最小长度量子谐振子的信息论分析

IF 1.7 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2025-09-17 DOI: 10.1007/s10773-025-06129-9

Francisco Ancelmo Pinheiro Ferreira

引用次数: 0