Communications in Theoretical Physics最新文献_第4页

Quantum correlations on chain-type quantum network 链式量子网络上的量子相关性

Communications in Theoretical Physics Pub Date : 2024-04-07 DOI: 10.1088/1572-9494/ad3b7b

Xiaofei Qi, Aihong Zhai, Lihua Yang

引用次数: 0

Multi-Functional Metasurface: Ultra-Wideband/Multi-Band Absorption Switching by adjusting Guided Mode Resonance and Local Surface Plasmon Resonance Effects 多功能元表面：通过调整导模共振和局部表面等离子体共振效应实现超宽带/多波段吸收切换

Communications in Theoretical Physics Pub Date : 2024-04-07 DOI: 10.1088/1572-9494/ad3b8f

Wenxin Li, Shubo Cheng, Huafeng Zhang, Zao Yi, Bin Tang, Can Ma, Pinghui Wu, Qingdong Zeng, Rizwan Raza

{"title":"Multi-Functional Metasurface: Ultra-Wideband/Multi-Band Absorption Switching by adjusting Guided Mode Resonance and Local Surface Plasmon Resonance Effects","authors":"Wenxin Li, Shubo Cheng, Huafeng Zhang, Zao Yi, Bin Tang, Can Ma, Pinghui Wu, Qingdong Zeng, Rizwan Raza","doi":"10.1088/1572-9494/ad3b8f","DOIUrl":"https://doi.org/10.1088/1572-9494/ad3b8f","url":null,"abstract":"\u0000 This study introduces an innovative dual-tunable absorption film with the capability to switch between ultra-wideband and narrowband absorption. By manipulating the temperature, the film can achieve multi-band absorption within the 30-45 THz range or ultra-wideband absorption spanning 30-130 THz, with an absorption rate exceeding 0.9. Furthermore, the structural parameters of the absorption film are optimized using the particle swarm optimization (PSO) algorithm to ensure optimal absorption response. The absorption response of the film is primarily attributed to the coupling of guided mode resonance and local surface plasmon resonance effects. The film's symmetric structure enables polarization incoherence and allows for tuning through various means such as doping/voltage, temperature, and structural parameters. In the case of multi-band absorption response, the film exhibits good sensitivity to refractive index changes in multiple absorption modes. Additionally, the absorption spectrum of the film remains effective even at large incidence angles, making it highly promising for applications in fields like biosensing and infrared stealth.","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":"140733277","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 metamaterial terahertz device with temperature regulation function that can achieve perfect absorption and complete reflection conversion of ultra wideband 一种具有温度调节功能的超材料太赫兹器件，可实现超宽带的完美吸收和完全反射转换

Communications in Theoretical Physics Pub Date : 2024-04-07 DOI: 10.1088/1572-9494/ad3b8d

Hao Sun, Zao Yi, Can Ma, Shubo Cheng, Bin Tang, Qingdong Zeng, Sohail Ahmad

{"title":"A metamaterial terahertz device with temperature regulation function that can achieve perfect absorption and complete reflection conversion of ultra wideband","authors":"Hao Sun, Zao Yi, Can Ma, Shubo Cheng, Bin Tang, Qingdong Zeng, Sohail Ahmad","doi":"10.1088/1572-9494/ad3b8d","DOIUrl":"https://doi.org/10.1088/1572-9494/ad3b8d","url":null,"abstract":"\u0000 Terahertz devices are an important field in terahertz technology. However, most devices currently have limited functionality and poor performance. In order to improve device performance and achieve multifunctionality, we have designed a terahertz device based on a combination of vanadium dioxide and metamaterials. By utilizing the phase transition characteristics of vanadium dioxide, the device has tunability. The device is made up of a triple-layer structure inclusive of VO2, SiO2, and Au. This device exhibits various advantageous features, including broadband band coverage, high absorption capability, dynamic tunability, a simple structural design, polarization insensitivity, and incident angle insensitivity. The simulation results show that by controlling the temperature, the terahertz device achieves a thermal modulation range of spectral absorptivity from 0 to 0.99. At a temperature of 313 K, the device exhibits complete reflection of terahertz waves. As the temperature increases, the absorption rate increases. When the temperature reaches 353 K, the device absorption rate reaches over 97.7% in the range of 5-8.55 THz. This study employs the effective medium theory to elucidate the correlation between conductivity and temperature during the phase transition of VO2. Simultaneously, the variation in device performance is further elucidated by analyzing and depicting the intensity distribution of the electric field on the device surface at different temperatures. Furthermore, the impact of various structural parameters on device performance is examined, offering valuable insights and suggestions for selecting suitable parameter values in real-world applications. These characteristic renders the device highly promising for applications in stealth technology, energy harvesting, modulation, and other related fields, thus showcasing significant potential.","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":"140733168","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

Effects of triaxial deformation on the fission barrier in the $Z=118-120$ nuclei 三轴变形对 Z=118-120$ 核裂变势垒的影响

Communications in Theoretical Physics Pub Date : 2024-04-07 DOI: 10.1088/1572-9494/ad3b8e

Qing-Zhen Chai, Jia-Li Wang, Xing-Han Liu

{"title":"Effects of triaxial deformation on the fission barrier in the $Z=118-120$ nuclei","authors":"Qing-Zhen Chai, Jia-Li Wang, Xing-Han Liu","doi":"10.1088/1572-9494/ad3b8e","DOIUrl":"https://doi.org/10.1088/1572-9494/ad3b8e","url":null,"abstract":"\u0000 Within the framework of the macroscopic-microscopic model by using potential energy surface (PES) calculations in the three-dimensional space ($beta_2$, $gamma$, $beta_4$), the fission trajectory and fission barrier for $Z=118$(Og), $119, 120$ nuclei have been systematically investigated. The calculated PES includes macroscopic liquid-drop energy, microscopic shell correction and pairing correction. Taking the $^{294}$Og$_{176}$ nucleus as an example, we discuss the next closed shell after $Z=82$ and $N=126$ with the calculated Woods-Saxon single-particle levels. Then, the results of PES in $^{294}$Og is illustrated from the (X, Y) scale to the ($beta_2$, $gamma$) scale. The $gamma$ degree of freedom reveals the shape evolution clearly during the fission process. The structure near the minimum and saddle point of PES in the $Z=118, 119, 120$ nuclei are demonstrated simultaneously. Based on the potential energy curves, general trends of the evolution of the fission barrier heights and widths are also studied. The triaxial deformation in these superheavy mass regions plays a vital role in the first fission barrier, showing a significant reduction in both triaxial paths. In addition, the model-dependent fission barriers of proton-rich nuclei $^{295}$Og, $^{296$119 and $^{297}$120 are analyzed briefly. Our studies could be valuable for synthesizing the superheavy new elements in the forthcoming High Intensity Heavy-ion Accelerator Facility (HAIF) and other facilities.","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":"140733149","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

Existence of Long-Range Magnetic Order in Heisenberg Spin Nanoribbon with Edge Modification 边缘改性海森堡自旋纳米带中长程磁序的存在

Communications in Theoretical Physics Pub Date : 2024-04-02 DOI: 10.1088/1572-9494/ad3955

Da-cheng Ma, Ling-yi Cui, Chu-xiao Sun, Xiao-dan Chi, Z. Xianyu, An Du

{"title":"Existence of Long-Range Magnetic Order in Heisenberg Spin Nanoribbon with Edge Modification","authors":"Da-cheng Ma, Ling-yi Cui, Chu-xiao Sun, Xiao-dan Chi, Z. Xianyu, An Du","doi":"10.1088/1572-9494/ad3955","DOIUrl":"https://doi.org/10.1088/1572-9494/ad3955","url":null,"abstract":"\u0000 A long-range magnetic order appears on side decorated Heisenberg spin nanoribbon at nonzero temperature, although no spontaneous magnetization exists in a one- or two-dimensional isotropic Heisenberg model at any nonzero temperature according to Mermin-Wagner theorem. By use of the spin Green’s function method, we calculated the magnetizations of Heisenberg nanoribbon decorated by side spins with single-ion anisotropy and found that the system exhibits a nonzero transition temperature, whether the decorated edge spins of the system link together or separate from each other. When the width of the nanoribbon achieves infinity limit, the transition temperatures of the system tend to a same finite constant eventually whether one edge or double edges are decorated by side spins in the nanoribbon. The results reveal that the magnetism of a low-dimensional spin system is different from that of a three-dimensional spin system. When the single-ion anisotropy of edge spins in Heisenberg spin nanoribbon can be modulated by an electric field experimentally, various useful long-range magnetic orders of the system can be obtained. The works can provide a detailed theoretical basis for designing and fabricating the next-generation low-dimensional magnetic random-access memory.","PeriodicalId":508917,"journal":{"name":"Communications in Theoretical Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140751743","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

Persistent currents of ultrarelativistic plasma-encased endofullerene molecules entrapping H atom 夹带 H 原子的超相对论等离子体包裹内富勒烯分子的持续电流

Communications in Theoretical Physics Pub Date : 2024-04-01 DOI: 10.1088/1572-9494/ad393e

Mustafa Kemal Bahar

{"title":"Persistent currents of ultrarelativistic plasma-encased endofullerene molecules entrapping H atom","authors":"Mustafa Kemal Bahar","doi":"10.1088/1572-9494/ad393e","DOIUrl":"https://doi.org/10.1088/1572-9494/ad393e","url":null,"abstract":"\u0000 In this work, for the first time in the relevant literature, the persistent currents (pc) and induced magnetic fields (imf) of an endofullerene molecule guested a hydrogen atom, under a spherical confinement, are investigated. The endofullerene molecule is enclosed within a spherical region and embedded into a plasma environment. The plasma environment is depicted with the more general exponential cosine screened Coulomb (MGECSC) potential, and its relevant effects are analyzed by considering plasma screening parameters. The relevant model for endohedral confinement is the Woods-Saxon confinement potential, which is compatible with experimental data. The effects of various forms of Cn are thoroughly elucidated through the analysis of confinement depth, spherical shell thickness, the inner radius, and the smoothing parameters. To find the bound states in the spherically confined endofullerene, the decoupling of the second-order Dirac equation for the large and small components of the radial atomic wave functions is considered. The Dirac equation with the interaction potential is solved numerically by using the Runge-Kutta-Fehlberg method through the decoupling formalism. The influence of spin orientations on the pc and imf is also elucidated. The effects of spherical confinement, plasma shielding, and the structural properties of the fullerene on the pc and imf are thoroughly viewed. Moreover, under given physical conditions, the optimal ranges of these effects are determined.","PeriodicalId":508917,"journal":{"name":"Communications in Theoretical Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140793279","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

Acceleration of solar wind particles due to inertial Alfvén waves 惯性阿尔费文波对太阳风粒子的加速作用

Communications in Theoretical Physics Pub Date : 2024-04-01 DOI: 10.1088/1572-9494/ad3940

Kiran Batool, Imran Ali Khan, M. Shamir, Abdul Kabir, Syed Ayaz

引用次数: 0

Rotating effect on thermophysical properties of a two dimensional GaAs quantum ring 二维砷化镓量子环的热物理性质旋转效应

Communications in Theoretical Physics Pub Date : 2024-04-01 DOI: 10.1088/1572-9494/ad3941

Ahmad Ghanbari

引用次数: 0

Six Types of Spin Solitons in Three-Component Bose-Einstein Condensates 三分量玻色-爱因斯坦凝聚态中的六种自旋孤子

Communications in Theoretical Physics Pub Date : 2024-03-29 DOI: 10.1088/1572-9494/ad3906

Yuhao Wang, Lingtao Meng, Li-Chen Zhao

引用次数: 0

Inner-shell ionization cross sections of atoms by positron impact 正电子撞击下的原子内壳电离截面

Communications in Theoretical Physics Pub Date : 2024-03-29 DOI: 10.1088/1572-9494/ad3907

Y. Wang, Jia Ma, Liguang Jiao, Stephan Fritzsche

引用次数: 0