Pub Date : 2024-04-07DOI: 10.1088/1572-9494/ad3b7b
Xiaofei Qi, Aihong Zhai, Lihua Yang
Quantum network concerns several independent entangled resources and can create strong quantum correlations by performing joint measurements on some observers. In this paper, we discuss an $n$-partite chain network with each two neighboring observers sharing an arbitrary Bell state and all intermediate observers performing some POVMs with parameter $lambda$. The expressions of all postmeasurement states between any two observers are obtained, and their quantifications of Bell nonlocality, EPR steering and entanglement with different ranges of $lambda$ are respectively detected and analysed.
{"title":"Quantum correlations on chain-type quantum network","authors":"Xiaofei Qi, Aihong Zhai, Lihua Yang","doi":"10.1088/1572-9494/ad3b7b","DOIUrl":"https://doi.org/10.1088/1572-9494/ad3b7b","url":null,"abstract":"\u0000 Quantum network concerns several independent entangled resources and can create strong quantum correlations by performing joint measurements on some observers. In this paper, we discuss an $n$-partite chain network with each two neighboring observers sharing an arbitrary Bell state and all intermediate observers performing some POVMs with parameter $lambda$. The expressions of all postmeasurement states between any two observers are obtained, and their quantifications of Bell nonlocality, EPR steering and entanglement with different ranges of $lambda$ are respectively detected and analysed.","PeriodicalId":508917,"journal":{"name":"Communications in Theoretical Physics","volume":"16 18","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140732815","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}
Pub Date : 2024-04-07DOI: 10.1088/1572-9494/ad3b8f
Wenxin Li, Shubo Cheng, Huafeng Zhang, Zao Yi, Bin Tang, Can Ma, Pinghui Wu, Qingdong Zeng, Rizwan Raza
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.
{"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":"56 4","pages":""},"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}
Pub Date : 2024-04-07DOI: 10.1088/1572-9494/ad3b8d
Hao Sun, Zao Yi, Can Ma, Shubo Cheng, Bin Tang, Qingdong Zeng, Sohail Ahmad
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.
太赫兹设备是太赫兹技术的一个重要领域。然而，目前大多数器件功能有限，性能较差。为了提高器件性能并实现多功能性，我们设计了一种基于二氧化钒和超材料组合的太赫兹器件。利用二氧化钒的相变特性，该器件具有可调谐性。该器件由二氧化钒、二氧化硅和金三层结构组成。该器件具有多种优势，包括宽带覆盖、高吸收能力、动态可调谐性、结构设计简单、偏振不敏感和入射角不敏感。模拟结果表明，通过控制温度，该太赫兹器件实现了光谱吸收率在 0 至 0.99 之间的热调制范围。在温度为 313 K 时，该器件表现出对太赫兹波的完全反射。随着温度的升高，吸收率也随之增加。当温度达到 353 K 时，器件在 5-8.55 THz 范围内的吸收率达到 97.7% 以上。本研究利用有效介质理论阐明了 VO2 相变过程中电导率与温度之间的相关性。同时，通过分析和描述不同温度下器件表面的电场强度分布，进一步阐明了器件性能的变化。此外，还研究了各种结构参数对器件性能的影响，为在实际应用中选择合适的参数值提供了有价值的见解和建议。这些特性使得该器件在隐形技术、能量收集、调制和其他相关领域的应用前景十分广阔，从而展现出巨大的潜力。
{"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":"5 4","pages":""},"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}
Pub Date : 2024-04-07DOI: 10.1088/1572-9494/ad3b8e
Qing-Zhen Chai, Jia-Li Wang, Xing-Han Liu
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}$120 are analyzed briefly. Our studies could be valuable for synthesizing the superheavy new elements in the forthcoming High Intensity Heavy-ion Accelerator Facility (HAIF) and other facilities.
在宏观-微观模型框架内，利用三维空间（$beta_2$, $gamma$, $beta_4$）的势能面（PES）计算，系统地研究了Z=118$(Og), $119, 120$原子核的裂变轨迹和裂变势垒。计算的 PES 包括宏观液滴能、微观壳校正和配对校正。以$^{294}$Og$_{176}$核为例，我们讨论了在$Z=82$和$N=126$之后的下一个闭壳，并计算了伍兹-撒克逊单粒子水平。然后，从（X, Y）尺度到（$beta_2$, $gamma$）尺度说明了 PES 在 $^{294}$Og 中的结果。在裂变过程中，$gamma$自由度清楚地显示了形状的演变。同时还展示了 $Z=118、119、120$ 核中 PES 的最小值和鞍点附近的结构。根据势能曲线，还研究了裂变势垒高度和宽度演变的一般趋势。这些超重质量区域的三轴形变在第一裂变势垒中起着至关重要的作用，显示出两条三轴路径的显著减小。此外，还简要分析了富质子核 $^{295}$Og、$^{296}$119 和 $^{297}$120 与模型相关的裂变势垒。我们的研究对于在即将建成的高强度重离子加速器（HAIF）和其他设施中合成超重新元素很有价值。
{"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":"10 4","pages":""},"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}
Pub Date : 2024-04-02DOI: 10.1088/1572-9494/ad3955
Da-cheng Ma, Ling-yi Cui, Chu-xiao Sun, Xiao-dan Chi, Z. Xianyu, An Du
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.
{"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":"159 ","pages":""},"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}
Pub Date : 2024-04-01DOI: 10.1088/1572-9494/ad393e
Mustafa Kemal Bahar
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.
在这项工作中，相关文献首次研究了在球形约束下，内富勒烯分子与氢原子客体的持续电流（pc）和诱导磁场（imf）。内富勒烯分子被封闭在一个球形区域内，并嵌入等离子体环境中。等离子体环境用更一般的指数余弦屏蔽库仑（MGECSC）势来描述，并通过考虑等离子体屏蔽参数来分析其相关效应。内面约束的相关模型是伍兹-撒克逊约束势，它与实验数据相一致。通过分析约束深度、球壳厚度、内半径和平滑参数，深入阐明了各种形式的 Cn 的影响。为了找到球形约束内富勒烯中的束缚态，考虑了径向原子波函数大分量和小分量的二阶狄拉克方程的解耦。通过解耦形式主义，使用 Runge-Kutta-Fehlberg 方法对带有相互作用势的狄拉克方程进行了数值求解。研究还阐明了自旋方向对 pc 和 imf 的影响。此外，还深入研究了球形约束、等离子体屏蔽以及富勒烯结构特性对 pc 和 imf 的影响。此外，在给定的物理条件下，还确定了这些影响的最佳范围。
{"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":"143 11","pages":""},"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}
Pub Date : 2024-04-01DOI: 10.1088/1572-9494/ad3940
Kiran Batool, Imran Ali Khan, M. Shamir, Abdul Kabir, Syed Ayaz
Gaining an understanding of the effects and dynamics of the solar wind is crucial for the study of space weather, Earth’s magnetosphere, spacecraft protection, the dynamics of the Solar System, and various other aspects. Observations show that Alfvén waves effectively transfer energy to resonant particles. This study demonstrates how inertial Alfvén waves deliver their energy to resonant plasma particles in different solar environments under certain conditions. The analysis shows that inertial Alfvén waves experience more rapid damping with increasing parallel wavenumber, ambient magnetic field strength, and particle number density, coupled with a decrease in temperature. The rate of energy transfer to resonant particles intensifies with higher temperatures and reduced parallel wavenumber and particle number density. Particles with higher initial velocities actively participate in Landau damping, especially in regions with a stronger ambient magnetic field.
{"title":"Acceleration of solar wind particles due to inertial Alfvén waves","authors":"Kiran Batool, Imran Ali Khan, M. Shamir, Abdul Kabir, Syed Ayaz","doi":"10.1088/1572-9494/ad3940","DOIUrl":"https://doi.org/10.1088/1572-9494/ad3940","url":null,"abstract":"\u0000 Gaining an understanding of the effects and dynamics of the solar wind is crucial for the study of space weather, Earth’s magnetosphere, spacecraft protection, the dynamics of the Solar System, and various other aspects. Observations show that Alfvén waves effectively transfer energy to resonant particles. This study demonstrates how inertial Alfvén waves deliver their energy to resonant plasma particles in different solar environments under certain conditions. The analysis shows that inertial Alfvén waves experience more rapid damping with increasing parallel wavenumber, ambient magnetic field strength, and particle number density, coupled with a decrease in temperature. The rate of energy transfer to resonant particles intensifies with higher temperatures and reduced parallel wavenumber and particle number density. Particles with higher initial velocities actively participate in Landau damping, especially in regions with a stronger ambient magnetic field.","PeriodicalId":508917,"journal":{"name":"Communications in Theoretical Physics","volume":"774 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140757368","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}
Pub Date : 2024-04-01DOI: 10.1088/1572-9494/ad3941
Ahmad Ghanbari
In this work, we have investigated the effect of rotating term on thermodynamic properties of a 2D quantum ring. To this end, we have considered the radial potential of a 2D ring and solved the Schrödinger equation in the presence of the Aharonov-Bohm effect and a uniform magnetic field and determined the eigenvalues and eigenfunctions of the considered system. Using the calculated energy spectrum, we obtained the partition function and thermodynamic properties such as mean energy, specific heat, entropy and free energy. Our results show that the rotating effect has a significant influence on thermophysical properties of 2D quantum ring. We also study other effect of rotating term: 1) the effect of different values of rotating parameters and 2) the effect of negative rotation on thermodynamic properties of the system. Our results have been discuss in details.
{"title":"Rotating effect on thermophysical properties of a two dimensional GaAs quantum ring","authors":"Ahmad Ghanbari","doi":"10.1088/1572-9494/ad3941","DOIUrl":"https://doi.org/10.1088/1572-9494/ad3941","url":null,"abstract":"\u0000 In this work, we have investigated the effect of rotating term on thermodynamic properties of a 2D quantum ring. To this end, we have considered the radial potential of a 2D ring and solved the Schrödinger equation in the presence of the Aharonov-Bohm effect and a uniform magnetic field and determined the eigenvalues and eigenfunctions of the considered system. Using the calculated energy spectrum, we obtained the partition function and thermodynamic properties such as mean energy, specific heat, entropy and free energy. Our results show that the rotating effect has a significant influence on thermophysical properties of 2D quantum ring. We also study other effect of rotating term: 1) the effect of different values of rotating parameters and 2) the effect of negative rotation on thermodynamic properties of the system. Our results have been discuss in details.","PeriodicalId":508917,"journal":{"name":"Communications in Theoretical Physics","volume":"248 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140766320","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}
Pub Date : 2024-03-29DOI: 10.1088/1572-9494/ad3906
Yuhao Wang, Lingtao Meng, Li-Chen Zhao
Exact analytical solutions are good candidates for studying and explaining the dynamics of solitons in nonlinear systems. We further extend the region of existence of spin solitons in the nonlinearity coefficient space for the spin-1 Bose-Einstein condensate. Six types of spin soliton solutions can be obtained and they exist in different regions. Stability analysis and numerical simulation results indicate that three types of spin solitons are stable against weak noise. The non-integrable properties of the model can induce shape oscillation and increase in speed after the collision between two spin solitons. These results further enrich the soliton family for non-integrable models and can provide theoretical references for experimental studies.
{"title":"Six Types of Spin Solitons in Three-Component Bose-Einstein Condensates","authors":"Yuhao Wang, Lingtao Meng, Li-Chen Zhao","doi":"10.1088/1572-9494/ad3906","DOIUrl":"https://doi.org/10.1088/1572-9494/ad3906","url":null,"abstract":"\u0000 Exact analytical solutions are good candidates for studying and explaining the dynamics of solitons in nonlinear systems. We further extend the region of existence of spin solitons in the nonlinearity coefficient space for the spin-1 Bose-Einstein condensate. Six types of spin soliton solutions can be obtained and they exist in different regions. Stability analysis and numerical simulation results indicate that three types of spin solitons are stable against weak noise. The non-integrable properties of the model can induce shape oscillation and increase in speed after the collision between two spin solitons. These results further enrich the soliton family for non-integrable models and can provide theoretical references for experimental studies.","PeriodicalId":508917,"journal":{"name":"Communications in Theoretical Physics","volume":"7 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140365360","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}
Pub Date : 2024-03-29DOI: 10.1088/1572-9494/ad3907
Y. Wang, Jia Ma, Liguang Jiao, Stephan Fritzsche
The relativistic binary-encounter-Bethe model with Wannier-type threshold law is employed to obtain the inner-shell ionization cross sections of multi-electron atoms (Ni, Cu, Y, Ag, Au, Yb, Ta, and Pb) for positron impact energies from the thresholds up to $10^{5}$ keV. Good agreement between the present calculations and experimental data is obtained. The constant in the acceleration term derived from the Wannier law is determined to be $0.2$ and $0.5$ for the K- and L-shells, respectively.
{"title":"Inner-shell ionization cross sections of atoms by positron impact","authors":"Y. Wang, Jia Ma, Liguang Jiao, Stephan Fritzsche","doi":"10.1088/1572-9494/ad3907","DOIUrl":"https://doi.org/10.1088/1572-9494/ad3907","url":null,"abstract":"\u0000 The relativistic binary-encounter-Bethe model with Wannier-type threshold law is employed to obtain the inner-shell ionization cross sections of multi-electron atoms (Ni, Cu, Y, Ag, Au, Yb, Ta, and Pb) for positron impact energies from the thresholds up to $10^{5}$ keV. Good agreement between the present calculations and experimental data is obtained. The constant in the acceleration term derived from the Wannier law is determined to be $0.2$ and $0.5$ for the K- and L-shells, respectively.","PeriodicalId":508917,"journal":{"name":"Communications in Theoretical Physics","volume":"61 24","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140364877","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}
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