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Communications in Theoretical Physics最新文献

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p-Wave resonances in the exponential cosine screened Coulomb potential 指数余弦屏蔽库仑势中的 p 波共振
Communications in Theoretical Physics Pub Date : 2024-04-25 DOI: 10.1088/1572-9494/ad432d
Y. Wang, Li-Guang Jiao, Aihua Liu, Yew Kam Ho, Stephan Fritzsche
{"title":"p-Wave resonances in the exponential cosine screened Coulomb potential","authors":"Y. Wang, Li-Guang Jiao, Aihua Liu, Yew Kam Ho, Stephan Fritzsche","doi":"10.1088/1572-9494/ad432d","DOIUrl":"https://doi.org/10.1088/1572-9494/ad432d","url":null,"abstract":"\u0000 We perform benchmark calculations of the p-wave resonances in the exponentially cosine screened Coulomb potential using the uniform complex-scaling generalized pseudospectral method. The present results show significant improvement in the calculation accuracy compared to previous predictions and correct the misidentification of resonance electron configuration in previous works. It is found that the resonance states approximately follow a n^2-scaling law which is similar to the bound counterparts. The birth of new resonance would distort the trajectory of an adjacent higher-lying resonance.","PeriodicalId":508917,"journal":{"name":"Communications in Theoretical Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140657509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Observations on spontaneous chiral symmetry breaking and mass gap of QCD in finite volume 有限体积 QCD 的自发手性对称破缺和质量缺口观测
Communications in Theoretical Physics Pub Date : 2024-04-24 DOI: 10.1088/1572-9494/ad426f
Xiaolan Meng, Bolun Hu, Yi-Bo Yang
{"title":"Observations on spontaneous chiral symmetry breaking and mass gap of QCD in finite volume","authors":"Xiaolan Meng, Bolun Hu, Yi-Bo Yang","doi":"10.1088/1572-9494/ad426f","DOIUrl":"https://doi.org/10.1088/1572-9494/ad426f","url":null,"abstract":"\u0000 We present the lattice QCD simulation with the 2+1+1 flavor full QCD ensembles using near-physical quark masses and different spatial sizes $L$, at $asim$ 0.055 ;fm. The results show that the scalar and pesudoscalar 2-point correlator with the valence pion mass of approximately 230 MeV become degenerated at $Lle 1.0$ ;fm, and such an observation suggests that the spontaneous chiral symmetry breaking disappears effectively there. At the same time, the mass gap between the nucleon and pion masses remains larger then $Lambda_{rm QCD}$ at the entire $Lin[0.2,0.7]$ fm range.","PeriodicalId":508917,"journal":{"name":"Communications in Theoretical Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140664925","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Quantifying quantum entanglement via machine learning models 通过机器学习模型量化量子纠缠
Communications in Theoretical Physics Pub Date : 2024-04-19 DOI: 10.1088/1572-9494/ad4090
Changchun Feng, Lin Chen
{"title":"Quantifying quantum entanglement via machine learning models","authors":"Changchun Feng, Lin Chen","doi":"10.1088/1572-9494/ad4090","DOIUrl":"https://doi.org/10.1088/1572-9494/ad4090","url":null,"abstract":"\u0000 Quantifying entanglement measures for quantum states with unknown density matrices is a chal lenging task. Machine learning offers a new perspective to address this problem. By training machine learning models using experimentally measurable data, we can predict the target entan glement measures. In this study, we compare various machine learning models and find that the linear regression and stack models perform better than others. We investigate the model’s impact on quantum states across different dimensions and find that higher-dimensional quantum states yield better results. Additionally, we investigate which measurable data has better predictive power for target entanglement measures. Using correlation analysis and principal component analysis, we demonstrate that quantum moments exhibit a stronger correlation with coherent information among these data features.","PeriodicalId":508917,"journal":{"name":"Communications in Theoretical Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140683586","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Detailed Analysis of Relativistic Confi guration of Bardeen Anisotropic Spheres inModi fied f(G) Gravity 各向异性巴丁球在模拟 f(G) 重力下的相对论配置的详细分析
Communications in Theoretical Physics Pub Date : 2024-04-17 DOI: 10.1088/1572-9494/ad3f98
A. Malik, Ayesha Almas, T. Naz, Rubab Manzoor, M. Z. Bhatti
{"title":"Detailed Analysis of Relativistic Confi guration of Bardeen Anisotropic Spheres inModi fied f(G) Gravity","authors":"A. Malik, Ayesha Almas, T. Naz, Rubab Manzoor, M. Z. Bhatti","doi":"10.1088/1572-9494/ad3f98","DOIUrl":"https://doi.org/10.1088/1572-9494/ad3f98","url":null,"abstract":"\u0000 The objective of present work is to deal with physical features of anisotropic compact objects within the framework of f(G) modified theory of gravity. For our present work, the Einstein- Maxwell equations defined under the impression of charge by utilizing the Krori-Barua metric i.e, λ(r) = Xr2 + Y and β(r) = Zr2, described by spherically symmetric space-time. To accomplish the desired objective, we calculate the undefined constrains utilized within the stellar debate by using the comparison method of interior and exterior spacetime while Bardeen geometry consider as an exterior. Further, to analyze the stellar configuration of Bardeen compact stars by assuming viable f(G) models including logarithmic corrected, we establish some expressions for examining the components of pressure and density, respectively. We address the energy conditions to verify our model’s viability for the various star candidates. Some other physical features, such as equilibrium condition, equation of state parameters, adiabatic index, stability analysis, mass function, surface Redshift and compactness factor, have been investigated. Conclusively, all the obtained results shows that the system under consideration is physically stable, free from singularity, and viable. Keywords: Bardeen compact stars, f(G) modified gravity, Krori-Barua potential.","PeriodicalId":508917,"journal":{"name":"Communications in Theoretical Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140691698","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Stable stripe and vortex solitons in two-dimensional spin-orbit coupled Bose-Einstein condensates 二维自旋轨道耦合玻色-爱因斯坦凝聚体中的稳定条纹和涡旋孤子
Communications in Theoretical Physics Pub Date : 2024-04-15 DOI: 10.1088/1572-9494/ad3e66
Yuan Guo, Muhammad Idrees, Ji Lin, Hui-jun Li
{"title":"Stable stripe and vortex solitons in two-dimensional spin-orbit coupled Bose-Einstein condensates","authors":"Yuan Guo, Muhammad Idrees, Ji Lin, Hui-jun Li","doi":"10.1088/1572-9494/ad3e66","DOIUrl":"https://doi.org/10.1088/1572-9494/ad3e66","url":null,"abstract":"\u0000 We present a flexible manipulation and control of solitons via Bose-Einstein condensate. In the presence of Rashba spin-orbit coupling and repulsive interactions within a harmonic potential, our investigation reveals the numerical local solutions within the system. By manipulating the strength of repulsive interactions and adjusting spin-orbit coupling while maintaining a zero-frequency rotation, diverse soliton structures emerge within the system. These include plane-wave solitons, two distinct types of stripe solitons, and odd petal solitons with both single and double layers. The stability of these solitons is intricately dependent on the varying strength of spin-orbit coupling. Specifically, stripe solitons can maintain stable existence within regions characterized by enhanced spin-orbit coupling while petal solitons are unable to sustain stable existence under similar conditions. When rotational frequency is introduced to the system, solitons undergo a transition from stripe solitons to a vortex array characterized by sustained rotation. The rotational directions of clockwise and counterclockwise are non-equivalent owing to spin-orbit coupling. As a result, the properties of vortex solitons exhibit significant variation and are capable of maintaining a stable existence in the presence of repulsive interactions.","PeriodicalId":508917,"journal":{"name":"Communications in Theoretical Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140700854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A combined Liouville integrable hierarchy associated with a fourth-order matrix spectral problem 与四阶矩阵谱问题相关的组合刘维尔可积分层次结构
Communications in Theoretical Physics Pub Date : 2024-04-12 DOI: 10.1088/1572-9494/ad3dd9
Wen-Xiu Ma
{"title":"A combined Liouville integrable hierarchy associated with a fourth-order matrix spectral problem","authors":"Wen-Xiu Ma","doi":"10.1088/1572-9494/ad3dd9","DOIUrl":"https://doi.org/10.1088/1572-9494/ad3dd9","url":null,"abstract":"\u0000 This paper aims to discuss a fourth-order matrix spectral problem involving four potentials and to generate an associated Liouville integrable hierarchy via the zero curvature formulation. A bi-Hamiltonian formulation is furnished by applying the trace identity and a recursion operator is explicitly worked out, which exhibits the Liouville integrability of each model in the resulting hierarchy. Two specific examples, consisting of novel generalized combined nonlinear Schroedinger equations and modified Korteweg-de Vries equations, are given.","PeriodicalId":508917,"journal":{"name":"Communications in Theoretical Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140711956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Microscopic ensemble bootstrap in phase space 相空间中的微观集合引导
Communications in Theoretical Physics Pub Date : 2024-04-10 DOI: 10.1088/1572-9494/ad3cc3
Yu Zhang
{"title":"Microscopic ensemble bootstrap in phase space","authors":"Yu Zhang","doi":"10.1088/1572-9494/ad3cc3","DOIUrl":"https://doi.org/10.1088/1572-9494/ad3cc3","url":null,"abstract":"\u0000 The bootstrap method which has been studied under many quantum mechanical models turns out feasible in microcanonical ensemble as well. While the approach in [Y. Nakayama, Modern Physics Letters A 37, 10.1142/s0217732322500547 (2022)] produces a sector when energy is negative, in this paper we report a method that has stronger constraints and results in a smaller region. We also study other models to demonstrate the effectiveness of our method.","PeriodicalId":508917,"journal":{"name":"Communications in Theoretical Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140716854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Braneworld black holes with ModMax electrodynamics on the brane 在rane上使用ModMax电动力学的星际黑洞
Communications in Theoretical Physics Pub Date : 2024-04-10 DOI: 10.1088/1572-9494/ad3cc4
Haryanto Siahaan
{"title":"Braneworld black holes with ModMax electrodynamics on the brane","authors":"Haryanto Siahaan","doi":"10.1088/1572-9494/ad3cc4","DOIUrl":"https://doi.org/10.1088/1572-9494/ad3cc4","url":null,"abstract":"\u0000 In this study, we investigate ModMax electrodynamics localized within the RS-II and DGP branes, deriving corresponding 3-brane spacetime solutions that conform to the effective Einstein equations in each specific scenario. We construct solutions for charged black holes within the effective Einstein equation framework in both the braneworld scenarios. The examination explores the trajectories of charged objects in this spacetime, underscoring the significance of the nonlinear parameter. Our analysis uncovers that, similar to the prior ModMax black hole investigation, the nonlinear parameter plays a pivotal role in suppressing the effective charge of the black hole, owing to its definite positive value.","PeriodicalId":508917,"journal":{"name":"Communications in Theoretical Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140719434","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Impact of Segment Dilution on the Magnetic and Hysteretic Properties of Ferrimagnetic (1/2 -1) Segmented Ising Nanowire 分段稀释对铁磁性 (1/2 -1) 分段伊辛纳米线的磁性和滞后特性的影响
Communications in Theoretical Physics Pub Date : 2024-04-07 DOI: 10.1088/1572-9494/ad3b8c
Ersin Kantar
{"title":"The Impact of Segment Dilution on the Magnetic and Hysteretic Properties of Ferrimagnetic (1/2 -1) Segmented Ising Nanowire","authors":"Ersin Kantar","doi":"10.1088/1572-9494/ad3b8c","DOIUrl":"https://doi.org/10.1088/1572-9494/ad3b8c","url":null,"abstract":"\u0000 This study explores the presence of diverse phase diagrams and hysteresis characteristics, as well as their dependencies on segment dilution, in an Ising-type core/shell segmented nanostructure. The magnetic and hysteretic behaviors of the nanostructure were carefully investigated by employing the effective-field theory, and its respective diluted parameters. The phase diagrams reveal characteristic phenomena that are influenced by the dilution parameters. Specifically, this study examined the variations in phase transitions and tricritical points by altering the dilution and physical parameters of the segments. The investigation also encompasses an examination of the hysteresis characteristics, including the hysteresis loop, coercivity and remanence, in relation to the segment dilution dependence of the segmented nanowire. It was discovered that as the temperature rises, the hysteresis loop areas diminish. However, intriguingly, at specific dilution and crystal area values, the hysteresis loop areas exhibit an augmentation.","PeriodicalId":508917,"journal":{"name":"Communications in Theoretical Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140732636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Decomposition solutions and Backlund transformations of the BKP and CKP equations BKP 和 CKP 方程的分解解和 Backlund 变换
Communications in Theoretical Physics Pub Date : 2024-04-07 DOI: 10.1088/1572-9494/ad3b8b
Xiazhi Hao, Sen-uye Lou
{"title":"Decomposition solutions and Backlund transformations of the BKP and CKP equations","authors":"Xiazhi Hao, Sen-uye Lou","doi":"10.1088/1572-9494/ad3b8b","DOIUrl":"https://doi.org/10.1088/1572-9494/ad3b8b","url":null,"abstract":"\u0000 This manuscript introduces a modified formal variable separation approach, showcasing a systematic and notably straightforward methodology for analyzing the B-type Kadomtsev-Petviashvili equation. Through the application of this approach, we successfully ascertain decomposition solutions, Backlund transformations, the Lax pair, and the linear superposition solution associated with the aforementioned equation. Furthermore, we expand the utilization of this technique to the C-type Kadomtsev-Petviashvili equation, leading to the derivation of decomposition solutions, Backlund transformations, and the Lax pair specific to this equation. The results obtained not only underscore the efficacy of the proposed approach but also highlight its potential in offering a profound comprehension of integrable behaviors in nonlinear systems. Moreover, the approach establishes an efficient framework for establishing interrelations between diverse systems.","PeriodicalId":508917,"journal":{"name":"Communications in Theoretical Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140734054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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