Chinese Journal of Physics最新文献

{"title":"Corrigendum to “Hybrid differential evolutional algorithm for Falkner-Skan flow with rotation” [Chinese Journal of Physics 91 (2024) 977–1003 / 0577-9073/© 2024]","authors":"Javaid Ali , Muhammad Rafiq , Nauman Ahmed , Sultan Alqahtani , Ilyas Khan , Abha Singh","doi":"10.1016/j.cjph.2024.10.003","DOIUrl":"10.1016/j.cjph.2024.10.003","url":null,"abstract":"","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"93 ","pages":"Page 649"},"PeriodicalIF":4.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167159","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}

{"title":"Effects of stochastic electromagnetic fluctuation on signal detection of astrocyte-dressed neuron","authors":"Yasemin Erkan","doi":"10.1016/j.cjph.2024.12.001","DOIUrl":"10.1016/j.cjph.2024.12.001","url":null,"abstract":"<div><div>Signal transmission in the nervous system is frequently studied considering its different biological or environmental characteristics. Recent studies have revealed that dynamic neuronal behaviors in the brain are significantly modulated by both astrocytes and magnetic fluctuations. Moreover, the contact of the noisy electromagnetic environment with the biological nerve cells is also inevitable. However, the effects of stochastic electromagnetic fluctuation on signal detection in an astrocyte-dressed neuron have never been studied in detail. In this study, an improved astrocyte-dressed Hodgkin–Huxley neuron model subjected to electromagnetic fluctuation is examined. Sinus-Wiener limited noise is used to model the random structure of the electromagnetic field. Simulation results show that, without considering noisy electromagnetic induction, the optimum value of the electromagnetic feedback gain parameter and the weak signal frequency used optimize the response of the astrocyte-dressed Hodgkin–Huxley neuron to a weak signal. However, when electromagnetic noise is included in the model, it is found that as the electromagnetic noise intensity increases, the signal detection performance of the model decreases significantly compared to the without-noise case. The most interesting result of the study is the demonstration that electromagnetic fluctuations have the power to accelerate slow astrocyte dynamics. When electromagnetic noise is not included in the model, the concentration of <span><math><mrow><mi>C</mi><msup><mrow><mi>a</mi></mrow><mrow><mn>2</mn><mo>+</mo></mrow></msup></mrow></math></span> in the astrocyte increases with the increasing in electromagnetic feedback gain. By considering noisy electromagnetic model, the concentration of <span><math><mrow><mi>C</mi><msup><mrow><mi>a</mi></mrow><mrow><mn>2</mn><mo>+</mo></mrow></msup></mrow></math></span> in the astrocyte increases with increasing the electromagnetic noise strength. Moreover, the duration for the <span><math><mrow><mi>C</mi><msup><mrow><mi>a</mi></mrow><mrow><mn>2</mn><mo>+</mo></mrow></msup></mrow></math></span> concentration to reach the maximum level is significantly shortened. The results of the study show the degree to which the membrane potential of the neuron depends on changes in transmembrane current, astrocyte-induced regulation, and even the effect of electromagnetic induction and noise within the cell.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"93 ","pages":"Pages 34-45"},"PeriodicalIF":4.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167160","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}

{"title":"Magnetohydrodynamics (MHD) flow of ternary nanofluid and heat transfer past a permeable cylinder with velocity slip","authors":"Umi Nadrah Hussein ,&nbsp;Najiyah Safwa Khashi'ie ,&nbsp;Norihan Md Arifin ,&nbsp;Ioan Pop","doi":"10.1016/j.cjph.2024.12.002","DOIUrl":"10.1016/j.cjph.2024.12.002","url":null,"abstract":"<div><div>The increasing demand for energy-efficient and environmentally sustainable solutions has driven the exploration of ternary nanofluids for enhanced heat transfer applications. This numerical study investigates the magnetohydrodynamics (MHD) flow and heat transfer characteristics of a ternary hybrid nanofluid (copper-alumina-titania/water) over a shrinking/stretching cylinder, considering the effects of velocity slip, suction, and curvature parameters. The variable wall temperature is also included in the physical model. The model in PDEs is transformed into a simplified version of differential equations (ODEs) which can be solved using the bvp4c solver. Validation against previously published data confirms the accuracy of the model. Two solutions are possible if the shrinking surface is permeable (with suction effect), while only a unique solution is for the stretching case. Surprisingly, the copper-alumina-titania/water exhibits a lower heat transfer rate but higher skin friction as compared to the copper-alumina/water. Specifically, the heat transfer coefficient decreases by 5-10 % when incorporating the titania nanoparticle, while an increase of 8-12 % for the skin friction coefficient. Additionally, the velocity slip and curvature parameters accelerate the boundary layer separation, whereas increased suction delays this process. These findings provide insights into optimizing thermal management systems using ternary hybrid nanofluids, particularly under MHD effect.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"93 ","pages":"Pages 328-339"},"PeriodicalIF":4.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167919","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}

{"title":"Fluid-structure interaction analysis of blood flow in collapsible channels: Implications for sports performance","authors":"Rongbao Huang ,&nbsp;Bo Zhang ,&nbsp;Xu Han ,&nbsp;Yizhou Xing ,&nbsp;Lei Zhu","doi":"10.1016/j.cjph.2024.12.023","DOIUrl":"10.1016/j.cjph.2024.12.023","url":null,"abstract":"<div><div>The flow of fluid in collapsible channels is a topic of great interest with numerous physiological applications, including blood flow during sports and exercise. This paper presents a fluid-structure interaction (FSI) model for the study of single-phase fluid flow through a microchannel with a two-sided collapsible wall. The model considers the viscoelastic properties of the fluid and incorporates a moving mesh approach to analyze the deformation of the channel walls. Three distinct modes of motion are observed in the elastic walls involving the elastic walls bulge outward, they undergo a mode-2 deformation characterized by two half-wavelengths along the elastic walls, and the walls indent inward towards the channel. Furthermore, the study shows that as the Weissenberg number increased, there is an associated increase in pressure on the central part of the plate, particularly the major portion. This increase in pressure leads to a decrease in the deflection of the plate. Additionally, the results reveals that the thickness of the plate influences the wall deformations. Thicker plates exhibites minimal deformation compared to thinner plates, which display more pronounced deformations. Moreover, an increase in plate thickness results in a gradual upward (downward) movement of the lowest point of the upper wall (the highest point of the down wall), eventually shifting towards the midpoint of the elastic walls.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"93 ","pages":"Pages 601-610"},"PeriodicalIF":4.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167973","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}

{"title":"Electronic structure regulation of AlN/SiC nanoribbons through edge passivation with different atoms and doping with various transition metal atoms","authors":"Maoye Yin ,&nbsp;Xiangyang Tan ,&nbsp;Keyuan Wang ,&nbsp;Hengshuai Li ,&nbsp;Dong Fan ,&nbsp;Zhihao Wang ,&nbsp;Haiquan Hu ,&nbsp;Zhaogang Nie ,&nbsp;Feng Guo ,&nbsp;Zhenbao Feng ,&nbsp;Jun Li ,&nbsp;Dong Zhang ,&nbsp;Minghui Zhu ,&nbsp;Fei Wang","doi":"10.1016/j.cjph.2024.11.007","DOIUrl":"10.1016/j.cjph.2024.11.007","url":null,"abstract":"<div><div>In this paper, based on first principles, density functional theory is used to investigate the doping of transition metal atoms (Mn, Fe, Co, Ni) in AlN/SiC nanoribbons with edge passivation by different atoms (Cl, F, H, O) to induce magnetism and modulate properties. The research results show that the new structures proposed in this study with doping of transition metal atoms induce magnetism and a transition of properties. First, calculations determined the ferromagnetic coupling state to be the most stable state of the initial magnetic structure. Then, band structures, the density of states, and charge densities were analyzed to investigate the transition of properties. The AlN/SiC nanoribbons with Ni doping in Cl, F, and H atom edge-passivated structures all transitioned to half-metallic properties. Half-metal properties appeared in the AlN/SiC nanoribbons with Fe and Co doping in O atom edge-passivated structures, enabling the generation of 100 % spin-polarised current at the Fermi level. In addition, other structures exhibited properties of narrow bandgap semiconductors and metals. Furthermore, we used molecular dynamics simulations to verify the stability of the structures, demonstrating that the structures proposed in this study can stably exist. This provides more ideas and potential applications for the development of spintronics devices.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"93 ","pages":"Pages 202-220"},"PeriodicalIF":4.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167975","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}

{"title":"Dynamic interplay of anisotropy and matter–geometry coupling in stellar structures: A comprehensive study on the stability of pulsars 4U 1820-30 and LMC X-4","authors":"Tayyab Naseer ,&nbsp;M. Sharif ,&nbsp;Fatima Chand ,&nbsp;Assmaa Abd-Elmonem ,&nbsp;Nagat A.A. Suoliman","doi":"10.1016/j.cjph.2024.11.032","DOIUrl":"10.1016/j.cjph.2024.11.032","url":null,"abstract":"<div><div>This study investigates the behavior of dense celestial objects within the context of <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>R</mi><mo>,</mo><msub><mrow><mi>L</mi></mrow><mrow><mi>m</mi></mrow></msub><mo>,</mo><mi>T</mi><mo>)</mo></mrow></mrow></math></span> theory. We develop modified Einstein field equations that account for the anisotropic configured static interior spacetime. By applying two specific constraints associated with the radial metric function and anisotropic pressure, we find a couple of solutions to these highly non-linear gravitational equations. For both models, we encounter differential equations whose integration yield constants which are determined through matching conditions. Additionally, the requirement of vanishing radial pressure at the hypersurface also plays an important role in this context. Furthermore, we graphically evaluate certain conditions whose fulfillment ensures the model’s feasibility under different parametric values. For this, we take into account the observational data of two compact stars 4U 1820-30 and LMC X-4. We conclude both our models to be well-aligned with the required viability and stability criteria. We must highlight here that our study advances the understanding of how <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>R</mi><mo>,</mo><msub><mrow><mi>L</mi></mrow><mrow><mi>m</mi></mrow></msub><mo>,</mo><mi>T</mi><mo>)</mo></mrow></mrow></math></span> gravity affects the internal structure of compact stars, providing valuable insights for future explorations.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"93 ","pages":"Pages 75-93"},"PeriodicalIF":4.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143168052","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}

{"title":"Optimization of the rotational mode entanglement in a ring-shaped cavity with Casimir forces","authors":"Rubab Shabir ,&nbsp;Fazal Badshah ,&nbsp;Sobia Asghar ,&nbsp;Ziauddin ,&nbsp;Muhammad Idrees ,&nbsp;Shi-Hai Dong","doi":"10.1016/j.cjph.2024.12.003","DOIUrl":"10.1016/j.cjph.2024.12.003","url":null,"abstract":"<div><div>This research explores the measurement and enhancement of entanglement between two rotational modes generated by rotating mirrors within a ring cavity system. The study specifically focuses on the role of the Casimir force in augmenting the entanglement of these modes. A detailed analysis is conducted to understand the impact of various parameters on the entanglement, including the distances between the external plates and the rotating mirrors (<span><math><mrow><msub><mrow><mi>d</mi></mrow><mrow><mn>1</mn></mrow></msub><mo>=</mo><msub><mrow><mi>d</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></math></span>), the radius of the rotating mirrors (<span><math><mrow><msub><mrow><mi>r</mi></mrow><mrow><mn>1</mn></mrow></msub><mo>=</mo><msub><mrow><mi>r</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></math></span>), the temperature (<span><math><mi>T</mi></math></span>), and the areas of the external plates. The findings reveal that the presence of the Casimir force significantly enhances the entanglement between the rotational modes. This research introduces a novel technique for modulating the entanglement of rotational modes through the influence of the Casimir force, presenting new possibilities for advancements in quantum information science.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"93 ","pages":"Pages 172-182"},"PeriodicalIF":4.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143168057","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}

{"title":"On optical appearance of Einstein-Maxwell-Æther black holes surrounded by various accretions","authors":"Mitra Darvishi ,&nbsp;Malihe Heydari-Fard ,&nbsp;Morteza Mohseni","doi":"10.1016/j.cjph.2024.12.018","DOIUrl":"10.1016/j.cjph.2024.12.018","url":null,"abstract":"<div><div>We investigate the effects of the æther field and the electric charge on the observed shadow of two types of charged black holes in the Einstein-Maxwell-Æther theory. By considering the Einstein-Maxwell-Æther black holes surrounded by the static/infalling spherical, and optically and geometrically thin disk accretion flows, we study the shadow luminosities and the observed specific intensity of the image. We find that in the thin disk accretion model, the location and the emitted model of the accretion gas affect the optical appearance of charged Einstein-Æther black holes, while for the spherical accretion flows this is not observed. For a thin disk profile, we show that the observer will receive more intensity for an emitted model with Gaussian function when the innermost radiation radius lies in the innermost stable circular orbit. Comparing the results of the charged Einstein-Æther black holes with the neutral Einstein-Æther black holes, we show that the charged Einstein-Æther black holes have smaller dark area, but wider lensed ring and photon ring. We show that the Reissner–Nordstrom black hole has a larger dark area and narrower lensed ring and photon ring compared with the charged Einstein-Æther black holes.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"93 ","pages":"Pages 632-648"},"PeriodicalIF":4.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143168058","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}

{"title":"Relativistic self-focusing of Laguerre–Gaussian laser beam in density-rippled cold quantum plasma","authors":"Anchit Sinha ,&nbsp;Somaye Zare ,&nbsp;Niti Kant ,&nbsp;Oriza Kamboj","doi":"10.1016/j.cjph.2024.11.036","DOIUrl":"10.1016/j.cjph.2024.11.036","url":null,"abstract":"<div><div>This article investigates the relativistic self-focusing of Laguerre–Gaussian (LG) laser beams in density-rippled cold quantum plasma. The Laguerre–Gaussian laser beam with mode LG<span><math><msubsup><mrow></mrow><mrow><mn>1</mn></mrow><mrow><mn>0</mn></mrow></msubsup></math></span> is chosen to analyze its impact on this phenomenon. The influence of density ripples within the cold quantum plasma is included to explore their effect on the laser beam’s propagation. Analysis of the influence of plasma density, density ripples, and beam intensity on the propagation of the laser beam has been conducted by plotting suitable graphs. It is found that by increasing the laser beam intensity, the plasma density and amplitude of the density ripples, the laser beam focusses faster accompanied by more oscillations. Our results demonstrate that both the Laguerre–Gaussian laser beam and the presence of density ripples in cold quantum plasma significantly contribute to the relativistic self-focusing effect.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"93 ","pages":"Pages 310-317"},"PeriodicalIF":4.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143168063","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}

{"title":"Influence of plasma-chemical processes on the parameters of an atmospheric pressure Helium microdischarge","authors":"Mohamed M. Mandour ,&nbsp;Zijia Chu ,&nbsp;Anatoly A. Kudryavtsev ,&nbsp;Jingfeng Yao ,&nbsp;Chengxun Yuan","doi":"10.1016/j.cjph.2024.11.027","DOIUrl":"10.1016/j.cjph.2024.11.027","url":null,"abstract":"<div><div>This study investigates the influence of plasma-chemical processes on the parameters of an atmospheric pressure (AP) Helium microdischarge. Using a one-dimensional fluid model with both Maxwellian and non-Maxwellian electron energy distribution function (EEDF), we analyze the spatial profile of plasma parameters in a microdischarge with a <span><math><mrow><mn>0.2</mn><mi>m</mi><mi>m</mi></mrow></math></span> gap. There are significant differences in the recorded rate coefficients for dissociative recombination (DR) and three-body recombination (TR), which are essential for determining the densities of excited atoms and molecules in the high-pressure plasma, where the balance of charged particles is determined by volume recombination. A careful examination of the relevant literature reveals these contradictions. In order to adequately represent the main channels of creation and destruction of excited and charged particles, it is necessary to take into account the atomic states of Helium up to the quantum level <span><math><mrow><mi>n</mi><mo>=</mo><mn>4</mn></mrow></math></span>. The full set of plasma-chemical reactions includes elastic electron collisions, excitation and de-excitation by electrons and atoms, direct and stepwise ionization, associative ionization, molecular excimer creation and destruction, ion conversion, recombination, and radiation. The results reveal that the selected rate coefficients and EEDF form significantly influence the simulation outcomes. This highlights the need to develop improved theoretical models to enhance the control and use of plasma technologies.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"93 ","pages":"Pages 103-126"},"PeriodicalIF":4.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143168064","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}