Chinese Journal of Physics最新文献_第7页

Higher-order properties of multi-modal public transit networks 多模式公共交通网络的高阶特性

IF 4.6 2区物理与天体物理

Chinese Journal of Physics Pub Date : 2024-09-22 DOI: 10.1016/j.cjph.2024.09.033

Xiaohan Xu , Ailing Huang , Amer Shalaby , Zhihuan Jiang , Mengyuan Duan , Geqi Qi

{"title":"Higher-order properties of multi-modal public transit networks","authors":"Xiaohan Xu , Ailing Huang , Amer Shalaby , Zhihuan Jiang , Mengyuan Duan , Geqi Qi","doi":"10.1016/j.cjph.2024.09.033","DOIUrl":"10.1016/j.cjph.2024.09.033","url":null,"abstract":"<div><div>Over the years, research advances in public transit networks (PTNs) are restricted to pairwise interactions, while providing limited understanding of higher-order PTNs. In particular, exploring the higher-order interactions of multi-modal PTNs (MPTNs) can not only facilitate a more efficient and convenient way to meet the travel demands of passengers, but also improve the carrying capacity and attractiveness of public transit systems. Consequently, this paper characterizes the characteristic metrics of higher-order MPTNs and the node importance identification method considering higher-order cliques. The construction method of MPTNs and the metrics of higher-order network properties are first introduced. Based on investigating the characteristics of higher-order cliques, we then further design a node importance measure to explore the degree of station core of higher-order MPTNs. Finally, taking the Beijing public transit system as an example, three different types of MPTNs (including the bus network, bus-metro network, and bus-metro-taxi/ride-hailing network) are constructed, and their higher-order properties are statistically analyzed. The empirical study finds that the Beijing MPTNs with higher-order interactions have a large number of complex clique and cavity structures, which are typical of scale-free networks. In terms of node rankings, our proposed node importance measure incorporates rich information about the higher-order properties compared to well-known benchmark indices. Correspondingly, the measure performs overall better than other benchmarks in identifying the most vulnerable nodes under intentional attacks. The paper provides a reference for future exploration of the dynamic evolution mechanism of higher-order MPTNs, and can serve the actual network planning and design of urban MPTNs.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 432-452"},"PeriodicalIF":4.6,"publicationDate":"2024-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142417821","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 of quantum entanglement and Einstein–Podolsky–Rosen steering in a hybrid qubit-cavity optomagnonic system 在混合量子比特-腔光磁系统中产生量子纠缠和爱因斯坦-波多尔斯基-罗森转向

IF 4.6 2区物理与天体物理

Chinese Journal of Physics Pub Date : 2024-09-21 DOI: 10.1016/j.cjph.2024.09.024

Kai-Kai Zhang , Zhonghu Zhu , Tao Shui , Wen-Xing Yang

引用次数: 0

A problem with the conservation law observed in macroscopic quantum phenomena is a consequence of violation of the correspondence principle 在宏观量子现象中观察到的守恒定律问题是违反对应原理的结果

IF 4.6 2区物理与天体物理

Chinese Journal of Physics Pub Date : 2024-09-20 DOI: 10.1016/j.cjph.2024.09.023

A.V. Nikulov

{"title":"A problem with the conservation law observed in macroscopic quantum phenomena is a consequence of violation of the correspondence principle","authors":"A.V. Nikulov","doi":"10.1016/j.cjph.2024.09.023","DOIUrl":"10.1016/j.cjph.2024.09.023","url":null,"abstract":"<div><div>Jorge Hirsch drew attention to the contradiction of the Meissner effect with Faraday’s law and the law of angular momentum conservation. This article draws attention to the fact that the angular momentum can change without any force only due to quantization in both microscopic and macroscopic quantum phenomena. But if in the first case this change cannot exceed the Planck constant, then in the second case this change is macroscopic due to a violation of the correspondence principle. To explain the violation of the correspondence principle, Lev Landau postulated in 1941 that microscopic particles in superfluid helium and superconductor cannot move separately. Quantization can change not only the angular momentum, but also the kinetic energy of a superconducting condensate on a macroscopic amount. For this reason, the Meissner effect and other macroscopic quantum phenomena contradict the second law of thermodynamics. The reluctance of physicists to admit the violation of the second law of thermodynamics provoked a false understanding of the phenomenon of superconductivity and obvious contradictions in books on superconductivity.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 270-283"},"PeriodicalIF":4.6,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142358113","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

Thermal instability on heat and mass transfer of Oldroyd-B nanofluid with several types of gravity modulation in various enclosures 多种重力调制下奥尔德罗伊德-B 纳米流体在不同围护结构中传热传质的热不稳定性

IF 4.6 2区物理与天体物理

Chinese Journal of Physics Pub Date : 2024-09-19 DOI: 10.1016/j.cjph.2024.09.016

Anish Kumar , B.S. Bhadauria , Ismail , S.N. Rai

{"title":"Thermal instability on heat and mass transfer of Oldroyd-B nanofluid with several types of gravity modulation in various enclosures","authors":"Anish Kumar , B.S. Bhadauria , Ismail , S.N. Rai","doi":"10.1016/j.cjph.2024.09.016","DOIUrl":"10.1016/j.cjph.2024.09.016","url":null,"abstract":"<div><div>In this paper, the influence of three different types of gravity modulation on the stability of a layer of Oldroyd-B nanofluid in various enclosures is investigated. Gravity modulation using sine, square, and triangular waveforms can be significant. It has various applications, such as industrial processes, electronic cooling, and material science. The Oldroyd-B liquid model is significant because of its numerous applications, including the production of plastic sheets and polymer extrusion through a slit, dye in the polymer industry, biological solution of paint, tars, glues, and so on. We found the expression of the Rayleigh number by applying the normal mode technique in linear stability analysis. The results demonstrate that the porosity and porous parameters stabilize the system. The system becomes unstable due to the aspect ratio. This result implies that convection travels faster in a tall enclosure compared to a square enclosure and a shallow enclosure. In nonlinear analysis, we found the Nusselt and Sherwood numbers for heat and mass transportation. In heat and mass transfer, the Deborah number, retardation parameter, gravity modulation, porous parameter, porosity, and aspect ratio play essential roles. Porous parameter and porosity delayed the rate of heat and mass transportation. The value of the retardation parameter increases then the heat and mass transportation decreases. The system’s heat and mass transfer increases by increasing the Deborah number’s value. The aspect ratio increases the system’s heat and mass transfer. The heat and mass transfer in tall enclosure is much higher than in square and shallow enclosures.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 565-578"},"PeriodicalIF":4.6,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142417957","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

Pattern dynamics in a predator–prey model with Smith growth function and prey refuge in predator poisoned environment 带有斯密增长函数的捕食者-猎物模型中的模式动力学以及捕食者中毒环境中的猎物避难所

IF 4.6 2区物理与天体物理

Chinese Journal of Physics Pub Date : 2024-09-19 DOI: 10.1016/j.cjph.2024.09.015

Debjit Pal , Dipak Kesh , Debasis Mukherjee

{"title":"Pattern dynamics in a predator–prey model with Smith growth function and prey refuge in predator poisoned environment","authors":"Debjit Pal , Dipak Kesh , Debasis Mukherjee","doi":"10.1016/j.cjph.2024.09.015","DOIUrl":"10.1016/j.cjph.2024.09.015","url":null,"abstract":"<div><div>In this article, we investigate temporal as well as spatiotemporal dynamics of a predator–prey system where prey grows according to Smith growth function and prey refuges in predator poisoned environment. Self as well as cross diffusion are taken into consideration to describe spatial moment of the species which make the system more realistic. This study aims to investigate the role of prey refuge, toxin-carrying carcass and the impact of cross-diffusion on the spatial distribution of species densities and associated patterns. The existence of equilibria and their stability conditions for non-spatial system are derived. We discuss the occurrence of Hopf bifurcation and detect the stability of limit cycle by computing first Lyapunov number. Temporal dynamics of the system is studied by varying the significant parameters. Study reveals that both prey refuge and fatality rate of predator due to toxin-carrying carcass, initially makes the system stable for low refuge and fatality rate but predator population goes to extinction as those effects increase. Turing instability conditions are listed and different instability regions so formed are discussed. In Turing region, pattern selection with the help of amplitude equation via weakly nonlinear analysis are performed which also numerically supported. Intensity of refuge and fatality rate due to toxin carrying carcass result paradox with real ecological world due to the presence of cross diffusion. Various kind of patterns such as mixture of stripe and spot, spot, irregular chaotic patterns emerge due to Hopf and Turing instability. Particularly, spatiotemporal chaos is a controversial topic because of its significant consequences for population dynamics. The results of this work are expected to contribute to a better understanding the level of prey refuge, use of toxin-carrying carcass considering movement in population and effect of cross-diffusion.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 366-386"},"PeriodicalIF":4.6,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142417960","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

Parameter-induced logical stochastic resonance in substrate potential with deformable sine-Gordon shape 具有可变形正弦-戈登形状的基底电势中的参数诱导逻辑随机共振

IF 4.6 2区物理与天体物理

Chinese Journal of Physics Pub Date : 2024-09-19 DOI: 10.1016/j.cjph.2024.09.025

Peihong Li , Zhiqiang Liao , Hitoshi Tabata

{"title":"Parameter-induced logical stochastic resonance in substrate potential with deformable sine-Gordon shape","authors":"Peihong Li , Zhiqiang Liao , Hitoshi Tabata","doi":"10.1016/j.cjph.2024.09.025","DOIUrl":"10.1016/j.cjph.2024.09.025","url":null,"abstract":"<div><div>Logical stochastic resonance (LSR) systems are physical nonlinear systems capable of robust Boolean logic operations under the influence of noise. While LSR systems suitable for electronic circuit implementation have been extensively studied, research on condensed matter LSR systems remains limited to constrained bistability with saturation characteristic. Considering the presence of periodic nonlinearities in many physical systems, a deformable sine-Gordon-shaped Remoissenet–Peyrard potential (RPP)-based LSR system is proposed for the first time in this work. Testing under both noise-free and noisy conditions proves the existence of parameter-induced LSR phenomena in the proposed system. Moreover, we find that a relatively wide potential well shape contributes to enhanced noise robustness in the RPP-based LSR system. Additionally, traditional polynomial nonlinearity-based LSR systems are compared with the proposed system. Regardless of whether the noise is Gaussian white noise or composite noise containing spiking pulses, the RPP-based LSR system exhibits superior robustness. The results demonstrate the exceptional advantages of the RPP-based LSR system and encourage further design of condensed matter LSR systems based on deformable periodic nonlinearities.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 542-553"},"PeriodicalIF":4.6,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142417958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Node-to-node clustering asymptotic synchronized discrete stochastic neural networks in time and space with Bernoulli switching delay 具有伯努利开关延迟的节点到节点聚类渐近同步时空离散随机神经网络

IF 4.6 2区物理与天体物理

Chinese Journal of Physics Pub Date : 2024-09-18 DOI: 10.1016/j.cjph.2024.09.007

Tianwei Zhang , Yongyan Yang , Sufang Han

引用次数: 0

Stability and viability of charged anisotropic pulsar SAX J1748.9-2021 in extended symmetric teleparallel gravity 带电各向异性脉冲星 SAX J1748.9-2021 在扩展对称远平行引力中的稳定性和生存能力

IF 4.6 2区物理与天体物理

Chinese Journal of Physics Pub Date : 2024-09-17 DOI: 10.1016/j.cjph.2024.09.014

M. Sharif, Iqra Ibrar

{"title":"Stability and viability of charged anisotropic pulsar SAX J1748.9-2021 in extended symmetric teleparallel gravity","authors":"M. Sharif, Iqra Ibrar","doi":"10.1016/j.cjph.2024.09.014","DOIUrl":"10.1016/j.cjph.2024.09.014","url":null,"abstract":"<div><div>This manuscript aims to study the viability and stability of a pulsar SAX J1748.9-2021, containing a charged anisotropic matter configuration within the framework of <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>Q</mi><mo>,</mo><mi>T</mi><mo>)</mo></mrow></mrow></math></span> theory (<span><math><mi>Q</mi></math></span> and <span><math><mi>T</mi></math></span> are the non-metricity scalar and energy–momentum tensor, respectively). We employ a non-singular solution and a specific model of this gravitational theory and use junction conditions to determine the unknown constants in the metric coefficients. We explore different geometric and physical properties using astrophysical observations from the pulsar SAX J1748.9-2021, which is found in X-ray binary systems within globular clusters. This framework establishes relationships between various physical quantities, including fluid parameters, anisotropy, mass–radius relation, redshift, the Zeldovich condition, energy conditions, causality conditions, adiabatic index, Tolman–Oppenheimer–Volkoff equation, equation of state parameter and compactness. Our findings affirm the feasibility and stability of the proposed charged pulsar within this theoretical framework.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 333-352"},"PeriodicalIF":4.6,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142417944","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

High optical coupling between hybrid III-V and SOI platform with grating-assisted co-directional couplers 利用光栅辅助同向耦合器实现 III-V 和 SOI 混合平台之间的高光学耦合

IF 4.6 2区物理与天体物理

Chinese Journal of Physics Pub Date : 2024-09-16 DOI: 10.1016/j.cjph.2024.09.019

Ika Novitasari , San-Liang Lee

{"title":"High optical coupling between hybrid III-V and SOI platform with grating-assisted co-directional couplers","authors":"Ika Novitasari , San-Liang Lee","doi":"10.1016/j.cjph.2024.09.019","DOIUrl":"10.1016/j.cjph.2024.09.019","url":null,"abstract":"<div><div>The technology for heterogeneously integrating active III-V material structures on silicon photonic platforms has gained considerable advancement in recent years. Most of the prior work utilizes the silicon-on-insulator (SOI) platform with a thicker waveguide than the popular 220 nm thick silicon layer to achieve high coupling between the III-V waveguide and SOI waveguide. The thicker SOI waveguide results in closer effective refractive indices between the two heterogeneous waveguide structures to achieve better resonance conditions. Here, we demonstrate excellent light coupling from an active III-V structure to an SOI waveguide with a standard 220 nm Si waveguide by incorporating the grating-assisted co-directional coupler (GACC) method. The GACC grating structure can be formed on either side of the III-V and Si wafers. With the GACC scheme, a thicker adhesive for bonding the two different materials can be used. The simulation verifies that over 94 % energy coupling efficiency can be obtained by using a 100 nm thick DVS-BCB as the bonding layer. High coupling performance can be maintained over a 40 nm wavelength range around 1550 nm. The high coupling efficiency can be achieved with good phase matching and mode matching between the super-modes of the hybrid structure.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 688-700"},"PeriodicalIF":4.6,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142417946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Frequency and voltage-modulation multistable wave plate based on liquid crystals doped with silica nanoparticles 基于掺杂二氧化硅纳米颗粒的液晶的频率和电压调制多稳态波板

IF 4.6 2区物理与天体物理

Chinese Journal of Physics Pub Date : 2024-09-15 DOI: 10.1016/j.cjph.2024.09.020

Hui-Chi Lin , Wei-Hao Chou , Yu-Sung Liu

引用次数: 0