New Journal of Physics最新文献_第8页

Hybridization of electromagnetic multipoles in a nanoscatterer in the presence of another nanoscatterer 存在另一个纳米散射体时纳米散射体中电磁多极子的杂化

New Journal of Physics Pub Date : 2024-02-12 DOI: 10.1088/1367-2630/ad2894

Sagar Sehrawat, R. Kolkowski, A. Shevchenko

{"title":"Hybridization of electromagnetic multipoles in a nanoscatterer in the presence of another nanoscatterer","authors":"Sagar Sehrawat, R. Kolkowski, A. Shevchenko","doi":"10.1088/1367-2630/ad2894","DOIUrl":"https://doi.org/10.1088/1367-2630/ad2894","url":null,"abstract":"\u0000 Coupling between multipolar modes of different orders has not been investigated in depth, despite its fundamental and practical relevance in the context of optical metamaterials and metasurfaces. Here, we use an electromagnetic multipole expansion of both the scattered fields and the oscillating electric currents to reveal the multipolar excitations in a nanoparticle positioned close to another nanoparticle. The considered single-particle multipoles radically differ from multipoles excited in a pair of nanoparticles. Using the expansion, we reveal the multipole character of the electric currents and the contributions of the multipole moments to the scattering cross section of each particle, including the effect of their interaction. We find that light scattered by the particles plays the role of an inhomogeneous incident field for each of the particles, leading to hybridization of the originally independent orthogonal multipole resonances. For an incident plane wave polarized along the nanoparticle pair, the hybridization of the dipole and quadrupolar resonances gives rise to a significant narrowband resonance in the spectrum of the dipole scattering, which can be of interest for various applications, e.g., in surface-enhanced fluorescence and Raman spectroscopy. In general, this work shows that the multipole-multipole interaction between nanoparticles must be treated by taking into account also such hybridized multipole resonances.","PeriodicalId":508829,"journal":{"name":"New Journal of Physics","volume":"46 33","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139844878","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

One-dimensional extended Su-Schrieffer-Heeger models as descendants of a two-dimensional topological model 作为二维拓扑模型后代的一维扩展 Su-Schrieffer-Heeger 模型

New Journal of Physics Pub Date : 2024-02-12 DOI: 10.1088/1367-2630/ad2896

Tao Du, Yue Li, Helin Lu, Hui Zhang

{"title":"One-dimensional extended Su-Schrieffer-Heeger models as descendants of a two-dimensional topological model","authors":"Tao Du, Yue Li, Helin Lu, Hui Zhang","doi":"10.1088/1367-2630/ad2896","DOIUrl":"https://doi.org/10.1088/1367-2630/ad2896","url":null,"abstract":"\u0000 The topological phase diagrams and finite-size energy spectra of onedimensional extended Su-Schrieffer-Heeger models with long-range hoppings on the trimer lattice are investigated in detail. Due to the long-range hoppings, the band structure of the original Su-Schrieffer-Heeger model becomes more complicated and new phases with the large Zak phase can emerge. Furthermore, a seeming violation of bulk-edge correspondence occurs in the one-dimensional topological system whose band topology stems from the inversion symmetry. The one-dimensional models are mapped onto a two-dimensional topological model when a parameter of the one-dimensional models is regarded as an additional degree of freedom. As Fourier components of the derived two-dimensional model, phase boudaries and the finite-size spectra of onedimensional models can be recovered from the model in the higher spatial dimensions. Then the origin of edge modes of one-dimensional models can be understood from two dimensions and we give a reasonable explanation of the violation of bulk-edge correspondence in one spatial dimension. In fact, we may give a general perspective that the topological properties of one-dimensional (lower-dimensional) systems can be found their origin from two-dimensional (higher-dimensional) systems.","PeriodicalId":508829,"journal":{"name":"New Journal of Physics","volume":"85 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139842493","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

One-dimensional extended Su-Schrieffer-Heeger models as descendants of a two-dimensional topological model 作为二维拓扑模型后代的一维扩展 Su-Schrieffer-Heeger 模型

New Journal of Physics Pub Date : 2024-02-12 DOI: 10.1088/1367-2630/ad2896

Tao Du, Yue Li, Helin Lu, Hui Zhang

{"title":"One-dimensional extended Su-Schrieffer-Heeger models as descendants of a two-dimensional topological model","authors":"Tao Du, Yue Li, Helin Lu, Hui Zhang","doi":"10.1088/1367-2630/ad2896","DOIUrl":"https://doi.org/10.1088/1367-2630/ad2896","url":null,"abstract":"\u0000 The topological phase diagrams and finite-size energy spectra of onedimensional extended Su-Schrieffer-Heeger models with long-range hoppings on the trimer lattice are investigated in detail. Due to the long-range hoppings, the band structure of the original Su-Schrieffer-Heeger model becomes more complicated and new phases with the large Zak phase can emerge. Furthermore, a seeming violation of bulk-edge correspondence occurs in the one-dimensional topological system whose band topology stems from the inversion symmetry. The one-dimensional models are mapped onto a two-dimensional topological model when a parameter of the one-dimensional models is regarded as an additional degree of freedom. As Fourier components of the derived two-dimensional model, phase boudaries and the finite-size spectra of onedimensional models can be recovered from the model in the higher spatial dimensions. Then the origin of edge modes of one-dimensional models can be understood from two dimensions and we give a reasonable explanation of the violation of bulk-edge correspondence in one spatial dimension. In fact, we may give a general perspective that the topological properties of one-dimensional (lower-dimensional) systems can be found their origin from two-dimensional (higher-dimensional) systems.","PeriodicalId":508829,"journal":{"name":"New Journal of Physics","volume":"40 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139782562","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

Time scales in the dynamics of political opinions and the voter model 政治观点动态的时间尺度和选民模型

New Journal of Physics Pub Date : 2024-02-08 DOI: 10.1088/1367-2630/ad27bc

P. Meyer, Ralf Metzler

{"title":"Time scales in the dynamics of political opinions and the voter model","authors":"P. Meyer, Ralf Metzler","doi":"10.1088/1367-2630/ad27bc","DOIUrl":"https://doi.org/10.1088/1367-2630/ad27bc","url":null,"abstract":"\u0000 Opinions in human societies are measured by political polls on time scales of months to years. Such opinion polls do not resolve the effects of individual interactions but constitute a stochastic process. Voter models with zealots (individuals who do not change their opinions) can describe the mean-field dynamics in systems where no consensus is reached. We show that for large populations, the voter model with zealots is equivalent to the noisy voter model and it has a single characteristic time scale associated with the number of zealots in the population. We discuss which parameters are observable in real data by analysing time series of approval ratings of several political leaders that match the statistical behaviour of the voter model using the technique of the time-averaged mean squared displacement. The characteristic time scale of political opinions in societies is around 12 months, so it cannot be resolved by analysing election data, for which the resolution is several years. The effective population size in all fitted data sets is much smaller than the real population size, which indicates positive correlations of successive voter model steps. We also discuss the heterogeneity of voters as a cause of subdiffusion on long time scales, i.e., slow changes in the society.","PeriodicalId":508829,"journal":{"name":"New Journal of Physics","volume":"58 2‐3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139794107","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

Witnessing edge modes in trimerized circuit quantum electrodyamic lattice 见证三聚电路量子电晶格中的边缘模式

New Journal of Physics Pub Date : 2024-02-08 DOI: 10.1088/1367-2630/ad2761

Xuedong Zhao, Yan Xing, Ji Cao, Wen-Xue Cui, Shujie Liu, Hong-Fu Wang

引用次数: 0

Time scales in the dynamics of political opinions and the voter model 政治观点动态的时间尺度和选民模型

New Journal of Physics Pub Date : 2024-02-08 DOI: 10.1088/1367-2630/ad27bc

P. Meyer, Ralf Metzler

{"title":"Time scales in the dynamics of political opinions and the voter model","authors":"P. Meyer, Ralf Metzler","doi":"10.1088/1367-2630/ad27bc","DOIUrl":"https://doi.org/10.1088/1367-2630/ad27bc","url":null,"abstract":"\u0000 Opinions in human societies are measured by political polls on time scales of months to years. Such opinion polls do not resolve the effects of individual interactions but constitute a stochastic process. Voter models with zealots (individuals who do not change their opinions) can describe the mean-field dynamics in systems where no consensus is reached. We show that for large populations, the voter model with zealots is equivalent to the noisy voter model and it has a single characteristic time scale associated with the number of zealots in the population. We discuss which parameters are observable in real data by analysing time series of approval ratings of several political leaders that match the statistical behaviour of the voter model using the technique of the time-averaged mean squared displacement. The characteristic time scale of political opinions in societies is around 12 months, so it cannot be resolved by analysing election data, for which the resolution is several years. The effective population size in all fitted data sets is much smaller than the real population size, which indicates positive correlations of successive voter model steps. We also discuss the heterogeneity of voters as a cause of subdiffusion on long time scales, i.e., slow changes in the society.","PeriodicalId":508829,"journal":{"name":"New Journal of Physics","volume":"8 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139853615","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

Witnessing edge modes in trimerized circuit quantum electrodyamic lattice 见证三聚电路量子电晶格中的边缘模式

New Journal of Physics Pub Date : 2024-02-08 DOI: 10.1088/1367-2630/ad2761

Xuedong Zhao, Yan Xing, Ji Cao, Wen-Xue Cui, Shujie Liu, Hong-Fu Wang

引用次数: 0

Polarization State Conversion Achieved by Chiral Mechanical Metamaterial 手性机械超材料实现的偏振态转换

New Journal of Physics Pub Date : 2024-02-07 DOI: 10.1088/1367-2630/ad2745

Hicham Mangach, Younes Achaoui, M. Kadic, Abdenbi Bouzid, S'ebastien Guenneau, Shuwen Zeng

{"title":"Polarization State Conversion Achieved by Chiral Mechanical Metamaterial","authors":"Hicham Mangach, Younes Achaoui, M. Kadic, Abdenbi Bouzid, S'ebastien Guenneau, Shuwen Zeng","doi":"10.1088/1367-2630/ad2745","DOIUrl":"https://doi.org/10.1088/1367-2630/ad2745","url":null,"abstract":"\u0000 Chiral metamaterials have paved the way for progress in wave propagation and polarization control. In particular, chiral elastic metamaterials attracted considerable scientific attention due to their distinctive properties such as acoustical activity and auxeticity. Such characteristics arise from additional degrees of freedom for tuning the embedded micro- and macro-rotations. Herein, we use 3D chiral mechanical metamaterials to realize the polarization state conversion functionnality. A structural design of a 3D chiral metamaterial capable to induce up to 90° rotation in the plane of polarization is presented. This feature enables a straightforward switch between the three polarization states existing within a solid material, namely, longitudinal state, shear horizontal state, and shear vertical state. Efficient conversion from longitudinal movement to transverse movement is demonstrated. A discrete mass-spring model is proposed for these 3D chiral structures that describes the conversion behaviors based on the corresponding elastic coefficients. The engineered chiral metamaterial polarization converter is a promising device for efficient momentum conservation conversions. This allows converting longitudinal waves into shear waves while preserving the initial stimulating wave characteristics.","PeriodicalId":508829,"journal":{"name":"New Journal of Physics","volume":"23 47","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139795803","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

Polarization State Conversion Achieved by Chiral Mechanical Metamaterial 手性机械超材料实现的偏振态转换

New Journal of Physics Pub Date : 2024-02-07 DOI: 10.1088/1367-2630/ad2745

Hicham Mangach, Younes Achaoui, M. Kadic, Abdenbi Bouzid, S'ebastien Guenneau, Shuwen Zeng

{"title":"Polarization State Conversion Achieved by Chiral Mechanical Metamaterial","authors":"Hicham Mangach, Younes Achaoui, M. Kadic, Abdenbi Bouzid, S'ebastien Guenneau, Shuwen Zeng","doi":"10.1088/1367-2630/ad2745","DOIUrl":"https://doi.org/10.1088/1367-2630/ad2745","url":null,"abstract":"\u0000 Chiral metamaterials have paved the way for progress in wave propagation and polarization control. In particular, chiral elastic metamaterials attracted considerable scientific attention due to their distinctive properties such as acoustical activity and auxeticity. Such characteristics arise from additional degrees of freedom for tuning the embedded micro- and macro-rotations. Herein, we use 3D chiral mechanical metamaterials to realize the polarization state conversion functionnality. A structural design of a 3D chiral metamaterial capable to induce up to 90° rotation in the plane of polarization is presented. This feature enables a straightforward switch between the three polarization states existing within a solid material, namely, longitudinal state, shear horizontal state, and shear vertical state. Efficient conversion from longitudinal movement to transverse movement is demonstrated. A discrete mass-spring model is proposed for these 3D chiral structures that describes the conversion behaviors based on the corresponding elastic coefficients. The engineered chiral metamaterial polarization converter is a promising device for efficient momentum conservation conversions. This allows converting longitudinal waves into shear waves while preserving the initial stimulating wave characteristics.","PeriodicalId":508829,"journal":{"name":"New Journal of Physics","volume":"47 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139855687","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

Influence of Gravitational Tilt on the Thermocapillary Convection in a Non-Axisymmetric Liquid Bridge 重力倾斜对非轴对称液桥中热毛细管对流的影响

New Journal of Physics Pub Date : 2024-02-02 DOI: 10.1088/1367-2630/ad25a7

Shuo Yang, Yupeng Zhang, Jie Cui, Daocheng Qin, Yuhang Wang, Pushi Ge, Jintao Luo, Duojiao Guan, Yunyi Zheng

{"title":"Influence of Gravitational Tilt on the Thermocapillary Convection in a Non-Axisymmetric Liquid Bridge","authors":"Shuo Yang, Yupeng Zhang, Jie Cui, Daocheng Qin, Yuhang Wang, Pushi Ge, Jintao Luo, Duojiao Guan, Yunyi Zheng","doi":"10.1088/1367-2630/ad25a7","DOIUrl":"https://doi.org/10.1088/1367-2630/ad25a7","url":null,"abstract":"\u0000 Fluid slosh caused by residual acceleration in microgravity is a common problem encountered in space engineering. To solve this problem, the ground-based experiment research on the influence of gravity jitter and gravitational tilt on the thermocapillary convection (TCC) transition behavior of non-axisymmetric liquid bridge has become an important issue in microgravity fluid management. Based on a mesoscale liquid bridge experimental platform which can realize gravitational tilt, the effect of gravitational tilt on TCC by using a high-speed camera equipped with a near-focus lens and a self-developed interface image recognition package. The results show that the spatio-temporal evolution of TCC by the influence of gravitational tilt is still divided into steady and oscillatory flow. In the stable TCC, the vortex core distortion of cellular flow caused by the imbalance left and right interface curvature invites cellular flow close to the free surface, and it shrinks to the intermediate height. As gravitational tilt increases, the transverse/longitudinal velocity peaks are significantly reduced, peak velocity has been reduced by 26-27%. Meanwhile, the longitudinal velocity gradient at the free interface increases significantly. Therefore, gravitational tilt plays an important role in improving the surface flow velocity. In the oscillatory TCC, the position of vortex core is closer to the free interface at the hot/cold corner as the periodic mutual occupation of the left and right cellular flows. The TCC is obviously inhibited due to the gravitational tilt. The critical temperature difference is increased by 25% and the onset of temperature oscillation at the hot corner is delayed by 20% compared with conventional gravity condition.","PeriodicalId":508829,"journal":{"name":"New Journal of Physics","volume":"61 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139870062","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