International Journal of Theoretical Physics最新文献_第9页

Sharing of Genuine Tripartite Nonlocality with Multiple Observers on one Side 一侧有多个观察者的真三方非定域共享

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 修正爱因斯坦-麦克斯韦-高斯-邦纳模型中的早期和晚期宇宙

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 振幅阻尼噪声下各种相互作用对引力Cat态的影响

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 洛伦兹破坏理论下Kerr-Newman-de Sitter黑洞的焦耳-汤孙膨胀

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 含抛物律非线性非线性的非线性Schrödinger方程的纯三次光学孤子解，无群速度色散

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 地球物理KdV方程的李对称、分岔、混沌和精确解的探索

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 纠缠同时性：用量子和经典纠缠检验洛伦兹和光速不变性

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

Strong Gravitational Lensing and Shadows by Quantum Schwarzschild Black Hole in Homogeneous Plasma 均匀等离子体中量子史瓦西黑洞的强引力透镜和阴影

IF 1.3 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2025-03-11 DOI: 10.1007/s10773-025-05940-8

Rukkiyya V P, Sini R

{"title":"Strong Gravitational Lensing and Shadows by Quantum Schwarzschild Black Hole in Homogeneous Plasma","authors":"Rukkiyya V P, Sini R","doi":"10.1007/s10773-025-05940-8","DOIUrl":"10.1007/s10773-025-05940-8","url":null,"abstract":"<div><p>In this paper, we investigate the strong gravitational effects of a quantum Schwarzschild black hole in the presence of homogeneous plasma, focusing on the impact of the polymerization parameter <span>(lambda )</span>. The analytical expression for the deflection angle in a strong field limit in a quantum Schwarzschild black hole surrounded by homogeneous plasma is derived. It is found that both the polymerization parameter <span>(lambda )</span> and the presence of uniform plasma can lead to an increase in the strong field parameters <span>(overline{a})</span> and <span>(overline{b})</span> and deflection angle <span>(alpha )</span>(b). Further, we performed the numerical calculation for the lensing observables, such as the angular position of the innermost image, the angular separation between the outermost image and the remaining image, the relative magnification, and the time delay between images on opposite sides of the lens for the supermassive black hole SgrA* in strong field limit, considering the effects of homogeneous plasma. We also studied the effect of plasma on the radius of the shadow. In conclusion, the polymerization parameter <span>(lambda )</span> and the presence of homogeneous plasma significantly affect the characteristics of shadows and strong gravitational lensing.</p></div>","PeriodicalId":597,"journal":{"name":"International Journal of Theoretical Physics","volume":"64 3","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143583479","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

Model of a Static, Spherically Symmetric, Charged Star with Anisotropic Stress and Its Complexity Analysis 具有各向异性应力的静态球对称带电星模型及其复杂性分析

IF 1.3 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2025-03-11 DOI: 10.1007/s10773-025-05941-7

Arpita Ghosh, Satarupa Barman, K Komathiraj, Ranjan Sharma

{"title":"Model of a Static, Spherically Symmetric, Charged Star with Anisotropic Stress and Its Complexity Analysis","authors":"Arpita Ghosh, Satarupa Barman, K Komathiraj, Ranjan Sharma","doi":"10.1007/s10773-025-05941-7","DOIUrl":"10.1007/s10773-025-05941-7","url":null,"abstract":"<div><p>Relevance of the ‘complexity factor’ in the studies of relativistic self-gravitating objects has become an area of intense research in recent years. To investigate the role of various factors contributing to the ‘complexity factor’ and subsequent occurrence of ‘cracking’ within a self-gravitating star, in this paper, we develop a new class of exact solutions to a spherically symmetric and static stellar configuration in the presence of charge and anisotropic pressure. Some of the stellar models studied earlier are shown to be sub-class our solutions. Making use of one particular class of solutions, we analyze the impacts of charge and anisotropic stress on the complexity factor of a given stellar configuration where the complexity factor is interpreted in terms of the definition put forward by Herrera [<i>Phys. Rev. D</i> <b>97</b> (2018) 44010]. While, even in the presence of charge and anisotropic stress of an inhomogeneous stellar configuration, the complexity factor might vanish, we show that the complexity factor usually increases in the presence of charge and anisotropy.</p></div>","PeriodicalId":597,"journal":{"name":"International Journal of Theoretical Physics","volume":"64 3","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143583496","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

Exploring Light Deflection and Black Hole Shadows in Rastall Theory with Plasma Effects 利用等离子体效应探索拉斯塔尔理论中的光偏转和黑洞阴影

IF 1.3 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2025-03-10 DOI: 10.1007/s10773-025-05942-6

Riasat Ali, Xia Tiecheng, Rimsha Babar, Ali Övgün

引用次数: 0