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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 Q2 PHYSICS, MULTIDISCIPLINARY Pub Date : 2023-11-23 DOI: 10.1088/1572-9494/ad01ad
Jagdev Singh, Hassan Kamil Jassim, Devendra Kumar, Ved Prakash Dubey
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.
本文采用局部分数自然分解法(LFNDM)求解局部分数泊松方程。局部分数泊松方程在研究由固定电荷或质量密度分布引起的势场时起着重要作用。本文介绍了计算机模拟的数值示例。结果表明,LFNDM 在应用中是有效和方便的。
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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 Q2 PHYSICS, MULTIDISCIPLINARY Pub Date : 2023-11-23 DOI: 10.1088/1572-9494/ad0f14
Meryem Ziati, sanaa lahlali, H. Ez‐zahraouy
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.
这篇研究论文对 Sr2RuO2F2 化合物的电子、机械和传输特性提供了宝贵的见解。研究表明,Sr2RuO4 化合物呈现金属基态,能隙随着氧被氟取代而扩大。文章利用形变势理论 (DPT) 解释了绝对形变势 (ADP) 的概念及其与能带能量和应变的相关性。文章还使用 Voigt - Reuss - Hill 近似方法研究了 Sr2RuO2F2 的力学特征,并分析了其弹性常数、体积模量和剪切模量,表明其灵活性和适合光电应用。研究还探讨了声子在 Sr2RuO2F2 的散射率和载流子迁移率中的作用,以及声子介导的超导潜力。此外,还讨论了电子和空穴在应变下的固有电阻率及其对超导性和电阻率的潜在影响。本研究提供的见解有助于当前对 Sr2RuO2F2 及其潜在应用的理解。
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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 Q2 PHYSICS, MULTIDISCIPLINARY Pub Date : 2023-11-14 DOI: 10.1088/1572-9494/ad0c50
Zhao-Song Tan, Shou-Bang Yang, Zhen-Biao Yang, Shi-Biao Zheng
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.
研究退相干条件下纠缠介观场的非定域演化不仅对理解量子经典跃迁具有重要意义,而且对基于连续变量的量子通信和量子计算协议具有重要意义。根据先前的贝尔不等式公式,系统在纠缠消失之前就失去了非局部特征。我们在此构建了一个基于旋转和位移开关相关的新版本贝尔信号,只要存在纠缠并且场态分量保持拟正交,贝尔不等式就被违反。因此,与以前的公式相比,我们的公式所揭示的非局部特性的衰减要慢得多。更重要的是,存在一个广泛的制度,其中贝尔不等式恢复与先前的公式,但仍然违反基于我们的相关算子。
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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 Q2 PHYSICS, MULTIDISCIPLINARY Pub Date : 2023-11-14 DOI: 10.1088/1572-9494/ad0c4f
Shi-Lei Chao, Zi-Hao Li, Xin-You Lu
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.
摘要提出了一种在四音光驱动和光参量放大器(OPA)辅助下,利用量子不拆测(QND)提高力传感器灵敏度的理论方案。在特殊驱动的帮助下,可以将系统简化为力传感的典型QND,从而避免反作用噪声超过标准量子极限。此外,由于OPA改变了光磁化率,增加的噪声可以被抑制。 通过引入两个振荡子分别与两个带电体耦合, 信号可以通过库仑相互作用引起的非线性增强,而噪声 呈指数下降。此外,考虑到纯差检测效果,拓宽了系统参数和频带的范围,为同时规避反作用噪声、降低机械热噪声和增强外部信号提供了一条途径,可作为敏感器件的替代设计。
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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.
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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 Q2 PHYSICS, MULTIDISCIPLINARY Pub Date : 2023-11-13 DOI: 10.1088/1572-9494/ad0bf3
Yi Zhong, Yun-Zhi Du
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.
摘要本文研究了旋转Kerr-AdS黑洞的三种热机。我们首先简要回顾了Kerr-AdS黑洞的热力学和相结构,得到了$T$-$S$图中的相结构。研究了Kerr-AdS黑洞的热稳定性及其对各种参数的依赖关系。然后,利用相图,我们考虑了三种类型的热机:最大卡诺热机,斯特林热机和朗肯热机。我们计算了这些发动机的功和效率。结果表明,角动量对这些热机有显著的影响。
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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 Q2 PHYSICS, MULTIDISCIPLINARY Pub Date : 2023-11-10 DOI: 10.1088/1572-9494/ad0b6e
Linxue Wang, Hongli Yang, Hui Liu, Silin Chen, Yajun Wang, Xiaofei Zhang
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.
Rydberg修饰技术在超冷原子系统中的实验实现,为研究物质新态和宏观量子现象提供了另一个优越的平台。在这项工作中,基于平均场理论,我们研究了在环形阱中具有里德伯相互作用的双组分玻色-爱因斯坦凝聚体的基态相。在全参数空间中研究了Rydberg相互作用和外部势,特别是Rydberg封锁半径对该体系基态结构的影响。我们的研究结果表明,Rydberg封锁半径可以看作是另一个可控参数,可以用来获得各种基态相位。更有趣的是,发现对于弱Rydberg相互作用,Rydberg阻断半径打破了系统的自发旋转对称性,导致形成离散的单位胞结构。对于强相互作用情况,可实现不同阶次的离散旋转对称破缺
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","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 Q2 PHYSICS, MULTIDISCIPLINARY Pub Date : 2023-11-08 DOI: 10.1088/1572-9494/ad0a6d
Li xiang Zhang, Chuanzhong Li
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.
摘要对于极限分数级Volterra (LFV)层次,构造了n重Darboux 变换及其孤子解。进一步,我们将LFV层次扩展为非交换LFV (NCLFV)层次,并构造了由非交换版本的拟行列式表示的Darboux变换。同时,我们建立了NCLFV层次结构新解与旧解之间的关系。最后,得到了NCLFV层次的拟行列式解。
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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 Q2 PHYSICS, MULTIDISCIPLINARY Pub Date : 2023-11-03 DOI: 10.1088/1572-9494/ad0960
Hongcai Ma, Xiaoyu Chen, Aiping Deng
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.
摘要本文的主要目的是研究流体中第二扩展(3+1)维Jimbo-Miwa方程的不同类型孤子分子解。用Hirota双线性方法直接得到了线孤子、呼吸波、块状解和共振y型解四种不同的局域波。将速度共振条件与长波极限法相结合,得到了仅由线波、呼吸波或块状波组成的分子解。并推导出由不同波组成的分子溶液,如直线呼吸分子、块状呼吸分子、块状呼吸分子等。同时,获得了仅由线波组成的高阶分子溶液。这些发现可以用来解释海浪和非线性光学中的一些自然现象。
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 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 Q2 PHYSICS, MULTIDISCIPLINARY Pub Date : 2023-11-02 DOI: 10.1088/1572-9494/ad08ab
Preeti Dalal, Karanjeet Singh, Sachin Kumar
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.
摘要本文得到了f(R,T)引力理论中具有平面对称的完美流体分布的非静态解。首先利用李氏对称性,对考虑的向量场进行对称约简,以减少自变量的数量。然后,对应于每一个约简,得到精确解。杀死载体会导致不同的守恒量。因此,我们求出了所有解对应的杀伤向量场。进一步研究了导出的解,并观察到所有得到的时空,至少承认由∂y,∂z和- z∂y + y∂z组成的最小对称群。得到的度量,承认3,4,6和10,杀死向量场。所有的推导解都提供了沿y和z方向的线性动量守恒和沿x轴的角动量守恒。
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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 Q2 PHYSICS, MULTIDISCIPLINARY Pub Date : 2023-11-02 DOI: 10.1088/1572-9494/ad08ad
PIYALI BHAR, Farook Rahaman, Shyam Das, Somi Aktar, Abdelghani Errehymy
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.
摘要:本文的主要目的是在$f(T)$范式下获得解析相对论的精粹各向异性球面解。为此,施加压力各向异性条件,并采用Tolman-Kuchowicz型度量势。除了各向异性物质分布外,我们还假设我们当前的模型包含一个以参数$omega_q$为特征的精粹场。在参数$alpha$存在的情况下,通过选择$f (T)$函数来修改场方程。$f(T)$重力参数$alpha$在现有模型的基本物理特性,如密度、压力、阈下声速、表面红移等基础上增加了新的分量。通过选择紧凑型恒星Her X-1,并将$alpha$从$0.5$更改为$2.5$,我们检查了配置模型参数的所有物理特性。图形化过程表明,更紧凑的项目产生了更大的$alpha$值。讨论了模型的流体静力平衡条件,得到了现有模型的质量-半径关系。
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引用次数: 0
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Communications in Theoretical Physics
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