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Fractal dynamics and computational analysis of local fractional Poisson equations arising in electrostatics 静电学中产生的局部分数泊松方程的分形动力学和计算分析
IF 3.1 3区 物理与天体物理
Communications in Theoretical Physics Pub Date : 2023-11-23 DOI: 10.1088/1572-9494/ad01ad
Jagdev Singh, Hassan Kamil Jassim, Devendra Kumar, Ved Prakash Dubey
{"title":"Fractal dynamics and computational analysis of local fractional Poisson equations arising in electrostatics","authors":"Jagdev Singh, Hassan Kamil Jassim, Devendra Kumar, Ved Prakash Dubey","doi":"10.1088/1572-9494/ad01ad","DOIUrl":"https://doi.org/10.1088/1572-9494/ad01ad","url":null,"abstract":"In this paper, the local fractional natural decomposition method (LFNDM) is used for solving a local fractional Poisson equation. The local fractional Poisson equation plays a significant role in the study of a potential field due to a fixed electric charge or mass density distribution. Numerical examples with computer simulations are presented in this paper. The obtained results show that LFNDM is effective and convenient for application.","PeriodicalId":10641,"journal":{"name":"Communications in Theoretical Physics","volume":"71 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2023-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138687032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Correlation between mechano – electronic features and scattering rates using deformation potential theory (DPT) 利用形变势理论 (DPT) 将机械电子特征与散射率联系起来
IF 3.1 3区 物理与天体物理
Communications in Theoretical Physics Pub Date : 2023-11-23 DOI: 10.1088/1572-9494/ad0f14
Meryem Ziati, sanaa lahlali, H. Ez‐zahraouy
{"title":"Correlation between mechano – electronic features and scattering rates using deformation potential theory (DPT)","authors":"Meryem Ziati, sanaa lahlali, H. Ez‐zahraouy","doi":"10.1088/1572-9494/ad0f14","DOIUrl":"https://doi.org/10.1088/1572-9494/ad0f14","url":null,"abstract":"This research paper has provided valuable insights into the electronic, mechanical, and transport properties of the Sr2RuO2F2 compound. The study shows that the Sr2RuO4 compound exhibits a metallic ground state and that the energy gap widens with oxygen substitution with fluorine. The concept of absolute deformation potential (ADP) and its correlation with band energies and strains is explained using deformation potential theory (DPT). The article also examines the mechanical features of Sr2RuO2F2 using the Voigt – Reuss – Hill approximation method and analyzes its elastic constants, bulk modulus, and shear modulus, indicating flexibility and suitability for optoelectronic applications. The role of acoustic phonons in scattering rates and carrier mobility in Sr2RuO2F2 and its potential for phonon – mediated superconductivity is explored. The intrinsic resistivity of electrons and holes under strain and its potential impact on superconductivity and electrical resistivity are also discussed. The insights provided by this study contribute to the current understanding of Sr2RuO2F2, and its potential applications.","PeriodicalId":10641,"journal":{"name":"Communications in Theoretical Physics","volume":"5 4 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2023-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139245779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Quantum nonlocality evolution for two entangled mesoscopic fields under decoherence 退相干下两个纠缠介观场的量子非定域演化
3区 物理与天体物理
Communications in Theoretical Physics Pub Date : 2023-11-14 DOI: 10.1088/1572-9494/ad0c50
Zhao-Song Tan, Shou-Bang Yang, Zhen-Biao Yang, Shi-Biao Zheng
{"title":"Quantum nonlocality evolution for two entangled mesoscopic fields under decoherence","authors":"Zhao-Song Tan, Shou-Bang Yang, Zhen-Biao Yang, Shi-Biao Zheng","doi":"10.1088/1572-9494/ad0c50","DOIUrl":"https://doi.org/10.1088/1572-9494/ad0c50","url":null,"abstract":"Abstract Investigation of the nonlocality evolution of entangled mesoscopic fields under decoherence not only is important for understanding the quantum-classical transition, but also has relevance to quantum communication and quantum computation protocols based on continuous variables. According to previous formulations of Bell inequalities, the system loses nonlocal features far before
the disappearance of entanglement. We here constructed a new version of Bell signal based on rotated and displaced on-off correlations, with which the Bell inequality is violated as long as there remains entanglement and the field state components keeps quasiorthogonal. Consequently, the nonlocal character revealed by our formulation decays much slower compared with those based on previous ones. More importantly, there exists a wide regime where the Bell inequality is restored with previous formulations but remains to be violated based on our correlations operators.","PeriodicalId":10641,"journal":{"name":"Communications in Theoretical Physics","volume":"32 43","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134954285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Enhancing force sensing in a squeezed optomechanical system with quantum non-demolition measurement 用量子不拆测量增强压缩光力学系统的力传感
3区 物理与天体物理
Communications in Theoretical Physics Pub Date : 2023-11-14 DOI: 10.1088/1572-9494/ad0c4f
Shi-Lei Chao, Zi-Hao Li, Xin-You Lu
{"title":"Enhancing force sensing in a squeezed optomechanical system with quantum non-demolition measurement","authors":"Shi-Lei Chao, Zi-Hao Li, Xin-You Lu","doi":"10.1088/1572-9494/ad0c4f","DOIUrl":"https://doi.org/10.1088/1572-9494/ad0c4f","url":null,"abstract":"Abstract A theoretical scheme is proposed to enhance the sensitivity of force sensor with 
quantum non-demolition measurement (QND) in an optomechanical setup assisted by four-tone optical driving
and an optical parametric amplifier (OPA). 
With the help of special drive, the system can be simplified as the typical type of QND for force sensing, 
so that the backaction noise can be evaded to surpass the standard quantum limit. Besides, the added noise can be suppressed 
owing to the modified optical susceptibility resulting from the OPA. 
By introducing two oscillators coupling with two charged bodies respectively,
the signal can be enhanced with the nonlinearity caused by Coulomb interaction, while the noise 
presents an exponential decrease. Moreover, considering the homodyne detection effect, the range of 
system parameters and frequency bands will be broadened.
The present investigation may provide a route toward simultaneously 
evading backaction noise, reducing the mechanical thermal noise, 
and enhancing the external signal, which can be an alternative design for sensitive devices.","PeriodicalId":10641,"journal":{"name":"Communications in Theoretical Physics","volume":"21 23","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134991224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Heat engines of Kerr-AdS black hole Kerr-AdS黑洞热机
3区 物理与天体物理
Communications in Theoretical Physics Pub Date : 2023-11-13 DOI: 10.1088/1572-9494/ad0bf3
Yi Zhong, Yun-Zhi Du
{"title":"Heat engines of Kerr-AdS black hole","authors":"Yi Zhong, Yun-Zhi Du","doi":"10.1088/1572-9494/ad0bf3","DOIUrl":"https://doi.org/10.1088/1572-9494/ad0bf3","url":null,"abstract":"In this paper, we investigate three types of heat engines for the rotating Kerr-AdS black hole. We first briefly review the thermodynamics and phase structure of the Kerr-AdS black hole and obtain the phase structure in the $T$-$S$ chart. The thermal stability of Kerr-AdS black holes, along with their dependence on various parameters, are thoroughly examined. Then, by utilizing the phase diagram, we consider three types of heat engines: the maximal Carnot engine, Stirling engine, and Rankine engine. We calculate both the work and efficiency for these engines. The results indicate that angular momentum has a significant influence on these heat engines.","PeriodicalId":10641,"journal":{"name":"Communications in Theoretical Physics","volume":"53 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136346732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Ground state of Rydberg-dressed Bose gas confined in toroidal trap 环形阱中里德堡修饰玻色气体的基态
3区 物理与天体物理
Communications in Theoretical Physics Pub Date : 2023-11-10 DOI: 10.1088/1572-9494/ad0b6e
Linxue Wang, Hongli Yang, Hui Liu, Silin Chen, Yajun Wang, Xiaofei Zhang
{"title":"Ground state of Rydberg-dressed Bose gas confined in toroidal trap","authors":"Linxue Wang, Hongli Yang, Hui Liu, Silin Chen, Yajun Wang, Xiaofei Zhang","doi":"10.1088/1572-9494/ad0b6e","DOIUrl":"https://doi.org/10.1088/1572-9494/ad0b6e","url":null,"abstract":"Abstract The experimental realization of Rydberg dressing technology in ultracold atomic systems provides another superior platform for studying novel states of matter and macroscopic quantum phenomena. In this work, based on the mean-field theory, we have investigated the ground-state phases of a two-component Bose-Einstein condensate with Rydberg interaction and confined in a toroidal trap. The effects of Rydberg interaction and external potential, especially the Rydberg blockade radius, on the ground-state structure of such a system have been investigated in full parameter space. Our results show that the Rydberg blockade radius, which can be regarded as another controllable parameter, can be used to obtain a variety of ground-state phases. More interestingly, it is found that for weak Rydberg interaction, the Rydberg blockade radius breaks the spontaneous rotational symmetry of the system, leading to the formation of a discrete unit cell structure. For strongly interacting cases, it can be used to realize different order of discrete rotational symmetry breaking.
","PeriodicalId":10641,"journal":{"name":"Communications in Theoretical Physics","volume":"115 30","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135137644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
On limit fractional Volterra hierarchies 关于极限分数Volterra层次
3区 物理与天体物理
Communications in Theoretical Physics Pub Date : 2023-11-08 DOI: 10.1088/1572-9494/ad0a6d
Li xiang Zhang, Chuanzhong Li
{"title":"On limit fractional Volterra hierarchies","authors":"Li xiang Zhang, Chuanzhong Li","doi":"10.1088/1572-9494/ad0a6d","DOIUrl":"https://doi.org/10.1088/1572-9494/ad0a6d","url":null,"abstract":"For the limit fractional Volterra (LFV) hierarchy, we construct the n-fold Darboux transformation and the soliton solutions. Furthermore, we extend the LFV hierarchy to the noncommutative LFV (NCLFV) hierarchy, and construct the Darboux transformation expressed by quasi determinant of the noncommutative version. Meanwhile, we establish the relationship between new and old solutions of the NCLFV hierarchy. Finally, the quasi determinant solutions of the NCLFV hierarchy are obtained.","PeriodicalId":10641,"journal":{"name":"Communications in Theoretical Physics","volume":" 7","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135341228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Novel soliton molecule solutions for the second extend (3+1)-dimensional Jimbo–Miwa equation in fluid mechanics 流体力学中二次扩展(3+1)维Jimbo-Miwa方程的新孤子分子解
3区 物理与天体物理
Communications in Theoretical Physics Pub Date : 2023-11-03 DOI: 10.1088/1572-9494/ad0960
Hongcai Ma, Xiaoyu Chen, Aiping Deng
{"title":"Novel soliton molecule solutions for the second extend (3+1)-dimensional Jimbo–Miwa equation in fluid mechanics","authors":"Hongcai Ma, Xiaoyu Chen, Aiping Deng","doi":"10.1088/1572-9494/ad0960","DOIUrl":"https://doi.org/10.1088/1572-9494/ad0960","url":null,"abstract":"Abstract The main aim of this paper is to investigate the different types of soliton molecule solutions of the second extend (3+1)-dimensional Jimbo-Miwa quation in a fluid. Four different localized waves: line solitons, breather waves, lump solutions and resonance Y-type solutions are obtained by the Hirota bilinear method directly. Furthermore, the molecule solutions consisting of only line waves, breathers or lump waves are generated by combining velocity resonance condition and long wave limit method. Also the molecule solutions such as line-breather molecule, lump-line molecule, lump-breather molecule etc.consisting of different waves are derived.
 Meanwhile, higher-order molecule solutions composed of only line waves are accquired. All of the above findings can be used to explain some natural phenomena in the ocean waves and nonlinear optics.","PeriodicalId":10641,"journal":{"name":"Communications in Theoretical Physics","volume":"4 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135868605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Non-static plane symmetric perfect fluid solutions and Killing symmetries in f(R,T) gravity 非静态平面对称完美流体解和f(R,T)重力下的压痕对称性
3区 物理与天体物理
Communications in Theoretical Physics Pub Date : 2023-11-02 DOI: 10.1088/1572-9494/ad08ab
Preeti Dalal, Karanjeet Singh, Sachin Kumar
{"title":"Non-static plane symmetric perfect fluid solutions and Killing symmetries in f(R,T) gravity","authors":"Preeti Dalal, Karanjeet Singh, Sachin Kumar","doi":"10.1088/1572-9494/ad08ab","DOIUrl":"https://doi.org/10.1088/1572-9494/ad08ab","url":null,"abstract":"Abstract In this paper, the non-static solutions for perfect fluid distribution with plane symmetry in f(R,T) gravitational theory are obtained. Firstly using the Lie symmetries, symmetry reductions are performed for considered vector fields to reduce the number of independent variables. Then, corresponding to each reduction, exact solutions are obtained. Killing vectors leads to different conserved quantities. There- fore, we figure out the Killing vector fields corresponding to all derived solutions. The derived solutions are further studied and it is observed that all of the obtained spacetimes, atleast admit the min- imal symmetry group consists of ∂y, ∂z and −z∂y + y∂z. The obtained metrics, admit 3, 4, 6, and 10, Killing vector fields. Con- servation of linear momentum in direction of y and z and angu- lar momentum along x axis is provided by all derived solutions.","PeriodicalId":10641,"journal":{"name":"Communications in Theoretical Physics","volume":"18 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135934393","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Anisotropic quintessence compact star in $f(T)$ gravity with Tolman-Kuchowicz metric potentials 具有Tolman-Kuchowicz度规势的f(T)$引力中的各向异性精紧星
3区 物理与天体物理
Communications in Theoretical Physics Pub Date : 2023-11-02 DOI: 10.1088/1572-9494/ad08ad
PIYALI BHAR, Farook Rahaman, Shyam Das, Somi Aktar, Abdelghani Errehymy
{"title":"Anisotropic quintessence compact star in $f(T)$ gravity with Tolman-Kuchowicz metric potentials","authors":"PIYALI BHAR, Farook Rahaman, Shyam Das, Somi Aktar, Abdelghani Errehymy","doi":"10.1088/1572-9494/ad08ad","DOIUrl":"https://doi.org/10.1088/1572-9494/ad08ad","url":null,"abstract":"Abstract To obtain analytically relativistic quintessence anisotropic spherical solutions in the $f(T)$ paradigm is the primary objective of this paper. To do this, the pressure anisotropy condition is imposed and we employ a metric potential of the Tolman-Kuchowicz type. We also suppose that our current model incorporates a quintessence field characterized by a parameter $omega_q$, in addition to the anisotropic matter distribution. In the presence of the parameter $alpha$, the field equations are modified by the choice of the $f (T)$ function. The $f(T)$ gravity parameter $alpha$ adds new components to the basic physical characteristics, such as density, pressure, subliminal sound velocity, surface redshift, etc of the present model. By selecting the compact star Her X-1 and varying $alpha$ from $0.5$ to $2.5$, we examined all the physical characteristics of the model parameter of the configuration. The graphical process demonstrates that a more compact item is produced with greater values of $alpha$. The hydrostatic equilibrium condition of the model is discussed as well as the mass-radius relationship for our current model is obtained.","PeriodicalId":10641,"journal":{"name":"Communications in Theoretical Physics","volume":"17 15-16","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135973076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
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