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A double-edged sword: diverse interactions in hypergraphs 双刃剑：超图中的多样化互动
IF 3.3 2区 物理与天体物理
New Journal of Physics Pub Date : 2024-09-12 DOI: 10.1088/1367-2630/ad76d3
Yewei Tao, Kaipeng Hu, Pengyue Wang, Xiaoqian Zhao and Lei Shi
{"title":"A double-edged sword: diverse interactions in hypergraphs","authors":"Yewei Tao, Kaipeng Hu, Pengyue Wang, Xiaoqian Zhao and Lei Shi","doi":"10.1088/1367-2630/ad76d3","DOIUrl":"https://doi.org/10.1088/1367-2630/ad76d3","url":null,"abstract":"Interaction diversity and interaction identity, as two classic interaction patterns in real-world systems, are frequently employed to probe into the cooperative dilemmas among participants with diverse interaction identities within groups. Considering the influence of factors such as hyperlink configurations on the evolution of cooperation within complex networks, this study particularly focuses on the organic integration of hypergraphs and diverse interaction modes. Employing the public goods game model in uniformly stochastic hypergraphs, we explore the effects of synergy factors and diverse interacting individuals on the cooperation rate and strategy consistency within hyperlinks. We emphasize that the diverse interacting individuals are a double-edged sword, and the controlled number of such individuals is conducive to the evolution of cooperation. The findings of this study reveal the significance of these two typical interaction patterns and provide valuable insights for coordinating them to achieve social optimality in cooperation.","PeriodicalId":19181,"journal":{"name":"New Journal of Physics","volume":"5 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142214663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Generation and edge-state transitions of pseudohelical edge state based on side potentials in graphene 基于石墨烯侧势的伪螺旋边缘态的生成和边缘态转换
IF 3.3 2区 物理与天体物理
New Journal of Physics Pub Date : 2024-09-12 DOI: 10.1088/1367-2630/ad6eae
Xiao-Long Lü and Jun-Feng Liu
{"title":"Generation and edge-state transitions of pseudohelical edge state based on side potentials in graphene","authors":"Xiao-Long Lü and Jun-Feng Liu","doi":"10.1088/1367-2630/ad6eae","DOIUrl":"https://doi.org/10.1088/1367-2630/ad6eae","url":null,"abstract":"Pseudohelical edge state (PHES) was proposed based on a staggered spin–orbit coupling (SOC) uniformly applied on graphene. In this work, we investigate the formation of the PHES and its edge-state transitions by the side potentials composed of a uniform SOC, an antiferromagnetic exchange field and a staggered electric field that are applied on the boundaries in zigzag graphene nanoribbon. The results reveal that the PHESs can also be achieved by the side potential of the antisymmetric uniform spin–orbit coupling, which is attributed to the fact that the opposite (same) sign of energies at the valleys and indicates the presence (absence) of the edge state. Based on this modulated mechanism, the PHES can be further transformed into two different types of the PHESs, spin-polarized antichiral edge states (AESs) and one-sided spin-polarized AESs, by modulating the applied direction and location of the side potentials. More strikingly, by utilizing these edge-state transitions, we propose a spin dual-channel or single-channel field-effect transistor that can be operated by a staggered electric field. Moreover, we confirm that the proposed transistor is robust against disorders, with the assistance of calculating the transmission.","PeriodicalId":19181,"journal":{"name":"New Journal of Physics","volume":"96 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142214689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 the interpretation of mean-square displacement in heterogeneous systems 关于异质系统中均方位移的解释
IF 3.3 2区 物理与天体物理
New Journal of Physics Pub Date : 2024-09-12 DOI: 10.1088/1367-2630/ad77ec
Ming-Gen Li, Rui Xing, Li-Ming Fan, Meng Hu, Jing-Dong Bao and Peng-Cheng Li
{"title":"On the interpretation of mean-square displacement in heterogeneous systems","authors":"Ming-Gen Li, Rui Xing, Li-Ming Fan, Meng Hu, Jing-Dong Bao and Peng-Cheng Li","doi":"10.1088/1367-2630/ad77ec","DOIUrl":"https://doi.org/10.1088/1367-2630/ad77ec","url":null,"abstract":"When dealing with heterogeneous systems, interpreting the mean-square displacement (MSD) data appropriately is crucial. This is due to the limitation that the various interpretations of stochastic differential equations with state-dependent diffusivity may yield the same MSD data, leading to erroneous conclusions. Aided by analytical MSD solutions supported by Langevin simulations, we explore this limitation in diffusion processes exhibiting power-law state-dependent diffusivity, , with diffusion constant D0 and scaling index µ. We find that distinct interpretations leading to same MSD data possess different D0 values. A method is introduced to discern these D0-dependent interpretations. When applying the method to subdiffusion MSD data, we observe interpretation transitions depending on the value of the anomalous diffusion coefficient. Furthermore, we demonstrate that these D0-dependent interpretations respond diversely to memory effects, which may also be used to decide on the interpretation of MSD data. We believe that these findings offer insights for interpreting MSD data in heterogeneous systems.","PeriodicalId":19181,"journal":{"name":"New Journal of Physics","volume":"2 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142214688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Design principles for > 90 % ... 设计原则 > 90 % ...
IF 3.3 2区 物理与天体物理
New Journal of Physics Pub Date : 2024-09-12 DOI: 10.1088/1367-2630/ad7635
D Dlaka, P Androvitsaneas, A Young, Q Ma, E Harbord and Ruth Oulton
{"title":"Design principles for > 90 % ...","authors":"D Dlaka, P Androvitsaneas, A Young, Q Ma, E Harbord and Ruth Oulton","doi":"10.1088/1367-2630/ad7635","DOIUrl":"https://doi.org/10.1088/1367-2630/ad7635","url":null,"abstract":"Quantum dots have the potential to be one of the brightest deterministic single photon sources with high end applications in quantum computing and cluster state generation. In this work, we re-examine the design of plain micropillars by meticulously examining the structural effects of the decay into leaky channels beyond an atom-like cavity estimation. We show that precise control of the side losses with the diameter and avoidance of propagating Bloch modes in the distributed Bragg reflectors can result in easy-to-manufacture broadband ( –2500) micropillars, allowing for broad optical coherent control pulses necessary for high single photon purity ( 99.2%–99.99% achievable) while simultaneously demonstrating extremely high efficiency out the top (90.5%–96.4%). We also demonstrate that such cavities naturally decouple from the phonon sideband, with the phonon sideband reducing by a factor of 5–33 allowing us to predict that the photons should show 98.5%–99.8% indistinguishability without the need for filtering.","PeriodicalId":19181,"journal":{"name":"New Journal of Physics","volume":"4 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142214662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Vector rogue waves in spin-1 Bose–Einstein condensates with spin–orbit coupling 具有自旋轨道耦合的自旋-1 玻色-爱因斯坦凝聚体中的矢量无赖波
IF 3.3 2区 物理与天体物理
New Journal of Physics Pub Date : 2024-09-12 DOI: 10.1088/1367-2630/ad77ed
Jun-Tao He, Hui-Jun Li, Ji Lin and Boris A Malomed
{"title":"Vector rogue waves in spin-1 Bose–Einstein condensates with spin–orbit coupling","authors":"Jun-Tao He, Hui-Jun Li, Ji Lin and Boris A Malomed","doi":"10.1088/1367-2630/ad77ed","DOIUrl":"https://doi.org/10.1088/1367-2630/ad77ed","url":null,"abstract":"We analytically and numerically study three-component rogue waves (RWs) in spin-1 Bose–Einstein condensates with Raman-induced spin–orbit coupling (SOC). Using the multiscale perturbative method, we obtain approximate analytical solutions for RWs with positive and negative effective masses, determined by the effective dispersion of the system. The solutions include RWs with smooth and striped shapes, as well as higher-order RWs. The analytical solutions demonstrate that the RWs in the three components of the system exhibit different velocities and their maximum peaks appear at the same spatiotemporal position, which is caused by SOC and interactions. The accuracy of the approximate analytical solutions is corroborated by comparison with direct numerical simulations of the underlying system. Additionally, we systematically explore existence domains for the RWs determined by the baseband modulational instability (BMI). Numerical simulations corroborate that, under the action of BMI, plane waves with random initial perturbations excite RWs, as predicted by the approximate analytical solutions.","PeriodicalId":19181,"journal":{"name":"New Journal of Physics","volume":"1 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142214686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Telescope imaging beyond the Rayleigh limit in extremely low SNR 望远镜成像超越极低信噪比的雷利极限
IF 3.3 2区 物理与天体物理
New Journal of Physics Pub Date : 2024-09-11 DOI: 10.1088/1367-2630/ad6a7d
Hyunsoo Choi, Seungman Choi, Peter Menart, Angshuman Deka and Zubin Jacob
{"title":"Telescope imaging beyond the Rayleigh limit in extremely low SNR","authors":"Hyunsoo Choi, Seungman Choi, Peter Menart, Angshuman Deka and Zubin Jacob","doi":"10.1088/1367-2630/ad6a7d","DOIUrl":"https://doi.org/10.1088/1367-2630/ad6a7d","url":null,"abstract":"The Rayleigh limit and low signal-to-noise ratio (SNR) scenarios pose significant limitations to optical imaging systems used in remote sensing, infrared thermal imaging, and space domain awareness. In this study, we introduce a stochastic sub-Rayleigh imaging (SSRI) algorithm to localize point objects and estimate their positions, brightnesses, and number in low SNR conditions, even below the Rayleigh limit. Our algorithm adopts a maximum likelihood approach and exploits the Poisson distribution of incoming photons to overcome the Rayleigh limit in low SNR conditions. In our experimental validation, which closely mirrors practical scenarios, we focus on conditions with closely spaced sources within the sub-Rayleigh limit (0.49–1.00 R) and weak signals (SNR less than 1.2). We use the Jaccard index and Jaccard efficiency as a figure of merit to quantify imaging performance in the sub-Rayleigh region. Our approach consistently outperforms established algorithms such as Richardson–Lucy and CLEAN by 4X in the low SNR, sub-Rayleigh regime. Our SSRI algorithm allows existing telescope-based optical/infrared imaging systems to overcome the extreme limit of sub-Rayleigh, low SNR source distributions, potentially impacting a wide range of fields, including passive thermal imaging, remote sensing, and space domain awareness.","PeriodicalId":19181,"journal":{"name":"New Journal of Physics","volume":"118 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142214690","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Large-angle analytical solution of magnetization precession in ferromagnetic resonance 铁磁共振中磁化前冲的大角度解析解
IF 3.3 2区 物理与天体物理
New Journal of Physics Pub Date : 2024-09-11 DOI: 10.1088/1367-2630/ad7632
Zhen-Lin Jia, Shu-Chen Wang, Tong Li, Xiao-Wei Jin and De-Sheng Xue
{"title":"Large-angle analytical solution of magnetization precession in ferromagnetic resonance","authors":"Zhen-Lin Jia, Shu-Chen Wang, Tong Li, Xiao-Wei Jin and De-Sheng Xue","doi":"10.1088/1367-2630/ad7632","DOIUrl":"https://doi.org/10.1088/1367-2630/ad7632","url":null,"abstract":"Dynamics of magnetization M driven by microwave are derived analytically from the nonlinear Landau–Lifshitz–Gilbert equation. Analytical M and susceptibility are obtained self-consistently under a positive circularly polarized microwave field, , with frequency , which is perpendicular to a static field, . It is found that the orbital of M is always a cone along H. However, with increasing h the polar angle of M initially increases, then keeps 90° when in ferromagnetic resonance (FMR) mode, where is Gilbert damping constant and is gyromagnetic ratio. These effects result in a nonlinear variation of FMR signal as h increases to , where the maximum of resonance peak decreases from a steady value, linewidth increases from a decreasing trend. These analytical solutions provide a complete picture of the dynamics of M with different h and H.","PeriodicalId":19181,"journal":{"name":"New Journal of Physics","volume":"12 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142214693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Ultrafast artificial intelligence: machine learning with atomic-scale quantum systems 超快人工智能：利用原子尺度量子系统进行机器学习
IF 3.3 2区 物理与天体物理
New Journal of Physics Pub Date : 2024-09-11 DOI: 10.1088/1367-2630/ad7492
Thomas Pfeifer, Matthias Wollenhaupt and Manfred Lein
{"title":"Ultrafast artificial intelligence: machine learning with atomic-scale quantum systems","authors":"Thomas Pfeifer, Matthias Wollenhaupt and Manfred Lein","doi":"10.1088/1367-2630/ad7492","DOIUrl":"https://doi.org/10.1088/1367-2630/ad7492","url":null,"abstract":"We train a model atom to recognize pixel-drawn digits based on hand-written numbers in the range 0–9, employing intense light–matter interaction as a computational resource. For training, the images of the digits are converted into shaped laser pulses (data input pulses). Simultaneously with an input pulse, another shaped pulse (program pulse), polarized in the orthogonal direction, is applied to the atom and the system evolves quantum mechanically according to the time-dependent Schrödinger equation. The purpose of the optimal program pulse is to direct the system into specific atomic final states (classification states) that correspond to the input digits. A success rate of about 40% is achieved when using a basic optimization scheme that might be limited by the computational resources for finding the optimal program pulse in a high-dimensional search space. Our key result is the demonstration that the laser-programmed atom is able to generalize, i.e. successful classification is not limited to the training examples, but also the classification of previously unseen images is improved by training. This atom-sized machine-learning image-recognition scheme operates on time scales down to tens of femtoseconds, is scalable towards larger (e.g. molecular) systems, and is readily reprogrammable towards other learning/classification tasks. An experimental implementation of the scheme using ultrafast polarization pulse shaping and differential photoelectron detection is within reach.","PeriodicalId":19181,"journal":{"name":"New Journal of Physics","volume":"418 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142214687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Valley-polarized edge plasmons in graphene p–n junctions with pseudomagnetic fields 具有伪磁场的石墨烯 p-n 结中的谷极化边缘质子
IF 3.3 2区 物理与天体物理
New Journal of Physics Pub Date : 2024-09-11 DOI: 10.1088/1367-2630/ad762f
Ya Zhang, Feng Zhai and Wei Jiang
{"title":"Valley-polarized edge plasmons in graphene p–n junctions with pseudomagnetic fields","authors":"Ya Zhang, Feng Zhai and Wei Jiang","doi":"10.1088/1367-2630/ad762f","DOIUrl":"https://doi.org/10.1088/1367-2630/ad762f","url":null,"abstract":"Owing to the inherent characteristics of collective excitations in graphene, electrical control of edge plasmons is highly desirable for nanoplasmonic applications. This study investigates valley-polarized edge pseudomagnetoplasmons in a graphene p–n junction subjected to a strain-induced pseudomagnetic field. A four-component hydrodynamic model is employed and solved via the Wiener–Hopf method, revealing the coexistence of three plasmon modes, including counterpropagating acoustic edge modes, gapless topological edge states, and zero modes. The valley polarization, as determined from the numerically exact solution, is stronger than that predicted by the approximate models. Notably, the confinement of edge plasmons at the graphene p–n junction significantly exceeds that at the graphene/vacuum interface, possibly because of the electron–hole attraction. Furthermore, gate-controlled subwavelength confinement is successfully achieved by applying an appropriate gate voltage, thereby highlighting a unique and promising attribute of edge pseudomagnetoplasmons in graphene p–n junctions.","PeriodicalId":19181,"journal":{"name":"New Journal of Physics","volume":"6 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142214691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Phase diagram of strongly-coupled Rashba systems 强耦合拉什巴系统的相图
IF 3.3 2区 物理与天体物理
New Journal of Physics Pub Date : 2024-09-10 DOI: 10.1088/1367-2630/ad7630
B K Nally and P M R Brydon
{"title":"Phase diagram of strongly-coupled Rashba systems","authors":"B K Nally and P M R Brydon","doi":"10.1088/1367-2630/ad7630","DOIUrl":"https://doi.org/10.1088/1367-2630/ad7630","url":null,"abstract":"Motivated by the recent discovery of a possible field-mediated parity switch within the superconducting state of CeRh2As2 (Khim et al 2021 Science373 1012), we thoroughly investigate the dependence of the superconducting state of a strongly-coupled Rashba mono- and bilayer on internal parameters and an applied magnetic field. The role of interlayer pairing, spin orbit coupling, doping rate and applied magnetic field and their interplay was examined numerically at low temperature within a t-J-like model, uncovering complex phase diagrams and transitions between superconducting states with different symmetry.","PeriodicalId":19181,"journal":{"name":"New Journal of Physics","volume":"274 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142214694","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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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