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

Inertia Sets of Three-qubit Entanglement Witnesses

IF 1.3 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2025-03-22 DOI: 10.1007/s10773-025-05956-0

Qianying Yu, Lin Chen, Mengfan Liang

引用次数: 0

Two Families of Optimal Quantum Locally Recoverable Codes 最优量子局部可恢复代码的两个系列

IF 1.3 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2025-03-21 DOI: 10.1007/s10773-025-05943-5

Dengcheng Xie, Shixin Zhu, Zhonghua Sun

引用次数: 0

Is The Internal Entropy of F(R)-Gravity Really An Entropy?

IF 1.3 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2025-03-21 DOI: 10.1007/s10773-025-05957-z

Bohuslav Matouš

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Sharing of Genuine Tripartite Nonlocality with Multiple Observers on one Side

IF 1.3 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2025-03-20 DOI: 10.1007/s10773-025-05946-2

Shihui Wei, Yukun Wang, Huan Chen

{"title":"Sharing of Genuine Tripartite Nonlocality with Multiple Observers on one Side","authors":"Shihui Wei, Yukun Wang, Huan Chen","doi":"10.1007/s10773-025-05946-2","DOIUrl":"10.1007/s10773-025-05946-2","url":null,"abstract":"<div><p>In this paper, we study the sharing of genuine tripartite nonlocality with multiple observers on one side. For the generalized GHZ state under different parameter values, there are at most 0, 1 and 2 Charlies on one side respectively, which can simultaneously demonstrate genuine tripartite nonlocality with the single Alice and single Bob. Furthermore, for the standard GHZ state, we design an optimal protocol of genuine nonlocality sharing among multiple observers. After Charlie<span>(^{1})</span> using unsharp measurements with near-maximum strength, Charlie<span>(^{2})</span> can also demonstrate genuine tripartite nonlocality with the single Alice and single Bob. Our protocol has expanded the region of double Svetlichny inequality violation. Our results shed light on the interplay between nonlocality and quantum measurements, especially highlighting the impact of unsharp measurements, including the role of sharpness parameters and the design of measurement settings, on the sharing of nonlocality. These findings can be applied to various quantum information processing tasks, such as unbounded randomness certification, quantum steering and quantum communication network.</p></div>","PeriodicalId":597,"journal":{"name":"International Journal of Theoretical Physics","volume":"64 4","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143655251","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

The Early and Late Universe in the Modified Einstein-Maxwell-Gauss-Bonnet Model

IF 1.3 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2025-03-20 DOI: 10.1007/s10773-025-05953-3

Pyotr Tsyba, Dauren Rakhatov, Olga Razina

{"title":"The Early and Late Universe in the Modified Einstein-Maxwell-Gauss-Bonnet Model","authors":"Pyotr Tsyba, Dauren Rakhatov, Olga Razina","doi":"10.1007/s10773-025-05953-3","DOIUrl":"10.1007/s10773-025-05953-3","url":null,"abstract":"<div><p>This work is aimed at creating and verifying the viability of the Einstein-Gauss-Bonnet model with modifications in the form of the scalar fields and the electromagnetic field. The initial viability analysis of the model confirmed the compliance of the solutions with modern cosmological data. Due to the use of hybrid solutions, the model is universal and can consider a wide range of cases. In this way, it was possible to achieve simultaneous compliance with the conditions of slow-roll and chaotic inflation. The slow-roll parameters meet the requirements of the beginning and duration of inflation. The model fully corresponds to the red tilt of the spectral index <span>(n_S)</span> and corresponds to the Planck 2018 data. The propagation speed of scalar perturbations (<span>(c_A)</span>) and gravitational waves (<span>(c_T)</span>) coincide with the speed of light. Subsequently, an examination of the post-inflationary phase was conducted. The stability of the model is justified by the propagation speed of baryon oscillations. The presence of a transition from decelerated to accelerated expansion was found at the redshift <span>(zapprox 0.66)</span>. The application of the described methods has shown that the model is stable, viable, and can be used to study the early and late stages of the Universe.</p></div>","PeriodicalId":597,"journal":{"name":"International Journal of Theoretical Physics","volume":"64 4","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143655252","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

Effects of Various Interactions on Gravitational Cat States under Amplitude Damping Noise

IF 1.3 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2025-03-19 DOI: 10.1007/s10773-025-05945-3

Ramita Sarkar, Abbas Manan, Muhammad Noman, S. M. Zangi

{"title":"Effects of Various Interactions on Gravitational Cat States under Amplitude Damping Noise","authors":"Ramita Sarkar, Abbas Manan, Muhammad Noman, S. M. Zangi","doi":"10.1007/s10773-025-05945-3","DOIUrl":"10.1007/s10773-025-05945-3","url":null,"abstract":"<div><p>In modern quantum information processing, the engineering of quantum states to preserve information and correlations is crucial. We investigate two qubits characterized by gravitational interaction and spin-orbit coupling, assuming a specific separation between ground and excited states that affects the gravitational interaction strength. To enhance state manipulation for quantum information, we also consider exposing the system to an external magnetic field, a Josephson junction, and amplitude damping channel. We demonstrate that reduced magnetic field, temperature, and decoherence lead to higher levels of quantum correlations over longer intervals. Conversely, greater strengths of gravitational interaction, spin-orbit coupling and Josephson energy enhance the quantum correlations of the state. It is crucial to properly adjust the Josephson gate phase angle to achieve the desired levels of quantum correlations. Finally, the gravitational state characterized by various interactions remains a more optimal choice for quantum information than its simplest version, as it provides enhanced control over quantum features.</p></div>","PeriodicalId":597,"journal":{"name":"International Journal of Theoretical Physics","volume":"64 4","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143645478","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

Joule-Thomson Expansion of Kerr-Newman-de Sitter Black Hole Under Lorentz Violation Theory

IF 1.3 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2025-03-19 DOI: 10.1007/s10773-025-05949-z

Ningthoujam Media, T. Ibungochouba Singh

{"title":"Joule-Thomson Expansion of Kerr-Newman-de Sitter Black Hole Under Lorentz Violation Theory","authors":"Ningthoujam Media, T. Ibungochouba Singh","doi":"10.1007/s10773-025-05949-z","DOIUrl":"10.1007/s10773-025-05949-z","url":null,"abstract":"<div><p><b>In this paper, the tunneling of scalar particle near the event horizon of Kerr-Newman-de Sitter (KNdS) black hole is studied in frame dragging coordinates and Eddington coordinate under Lorentz violation theory (LVT). We also study the Joule-Thomson expansion for KNdS black hole under LVT by taking cosmological constant as thermodynamic pressure and its conjugate quantity as thermodynamic volume.</b> The critical behaviour of KNdS black hole is derived from the pressure in the presence of LVT. It is noted that the critical radius and critical pressure are not affected by LVT but the critical temperature depends on LVT. The Joule-Thomson coefficient is obtained by using the temperature, pressure, volume and entropy of the black hole. Then we obtain the inversion curves which determine the cooling and heating regions. Moreover, the isenthalpic curves in T-P plane are obtained with the cooling-heating region. The ratio of minimum inversion temperature to the critical temperature is derived for the KNdS black hole. We analyse the effect of LVT in thermodynamic quantities such as entropy, Helmholtz free energy, internal energy, pressure, enthalpy, Gibbs free energy and heat capacity for KNdS black hole. The specific heat capacity and Hessian matrix are also discussed to check the stability of the black hole by graphical analysis. <b>We also see that the swallowtail structure of KNdS black hole appears for different values of Lorentz violation parameter</b> <span>(lambda )</span>.</p></div>","PeriodicalId":597,"journal":{"name":"International Journal of Theoretical Physics","volume":"64 4","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143655263","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

Pure-Cubic Optical Soliton Solutions of the Nonlinear Schrödinger Equation Including Parabolic Law Nonlinearity in the Absence of the Group Velocity Dispersion

IF 1.3 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2025-03-18 DOI: 10.1007/s10773-025-05950-6

Muslum Ozisik, Selvi Altun Durmus, Aydin Secer, Mustafa Bayram

{"title":"Pure-Cubic Optical Soliton Solutions of the Nonlinear Schrödinger Equation Including Parabolic Law Nonlinearity in the Absence of the Group Velocity Dispersion","authors":"Muslum Ozisik, Selvi Altun Durmus, Aydin Secer, Mustafa Bayram","doi":"10.1007/s10773-025-05950-6","DOIUrl":"10.1007/s10773-025-05950-6","url":null,"abstract":"<div><p>This article investigates the third-order dimensionless nonlinear Schrödinger equation with a parabolic law media term, while deliberately excluding the group velocity dispersion term, which typically governs the propagation of ultrashort pulses. The Generalized Kudryashov approach, a powerful and novel technique, is applied for the first time to obtain pure-cubic optical soliton solutions for this model. Using this method, bright, kink, and dark soliton solutions are derived. To illustrate the dynamics and physical properties of these solutions, 2D, contour, and 3D visualizations are presented. In particular, 2D plots with carefully selected parameter values are provided to investigate how the presence of the parabolic law media term and the absence of the group velocity dispersion term influence soliton behavior. The results clearly demonstrate the physical relevance of the model and emphasize the effectiveness of the Generalized Kudryashov approach as a reliable technique for obtaining analytical solutions to the equation under consideration.</p></div>","PeriodicalId":597,"journal":{"name":"International Journal of Theoretical Physics","volume":"64 4","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143638446","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

Exploration of Lie Symmetry, Bifurcation, Chaos and Exact Solution of the Geophysical KdV Equation

IF 1.3 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2025-03-15 DOI: 10.1007/s10773-025-05934-6

Badr Saad T. Alkahtani

{"title":"Exploration of Lie Symmetry, Bifurcation, Chaos and Exact Solution of the Geophysical KdV Equation","authors":"Badr Saad T. Alkahtani","doi":"10.1007/s10773-025-05934-6","DOIUrl":"10.1007/s10773-025-05934-6","url":null,"abstract":"<div><p>This research delves into a deeper investigation of the geophysical KdV equation, which is a crucial mathematical model in the study of nonlinear wave dynamics, particularly in the propagation of oceanic waves. Lie symmetry analysis is used to investigate symmetry reductions, while bifurcation and phase portrait are used to analyze the dynamic behavior. Additionally, chaos theory has been employed to examine the features of the dynamical system. Moreover, by encompassing the recent computational method, namely, the modified Sardar Sub equation (MSSE) approach, we rigorously assess the novel soliton solutions, including dark, bright, singular, combo, periodic, bright-dark, rational forms, and mixed trigonometric. It is observed that while some of the derived solutions align with existing literature, the majority of the solutions obtained in this study differ significantly from previous results, highlighting the novelty of the work. To identify chaotic characteristics, various analytical tools are utilized, such as 3D and 2D phase plots, time series analysis, multistability analysis, Poincaré maps. These findings offer significant insights into the nonlinear behavior and complex dynamics of geophysical wave models, contributing to a deeper understanding of wave propagation and chaotic systems in applied mathematics and physics.</p></div>","PeriodicalId":597,"journal":{"name":"International Journal of Theoretical Physics","volume":"64 3","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143622042","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

Entangled Simultaneity: Testing Lorentz and Light Speed Invariance with Quantum and Classical Entanglement

IF 1.3 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2025-03-13 DOI: 10.1007/s10773-025-05932-8

Gianfranco Spavieri, Ramón Carrasquero, Antonio Contreras, Kevin Durán, Andrés Flores, Juan Carlos Mendoza

引用次数: 0