The European Physical Journal Plus最新文献

{"title":"Thermal behavior of multi-walled α-graphyne nanotubes: the influence of strain, temperature, and stacking order","authors":"Kaifeng Chen,&nbsp;Li-Cai Zhao","doi":"10.1140/epjp/s13360-025-06130-5","DOIUrl":"10.1140/epjp/s13360-025-06130-5","url":null,"abstract":"<div><p>In this study, molecular dynamics (MD) simulations are employed to investigate the thermal conductivity (TC) behavior of α-graphyne nanotubes (α-GNTs). The effects of various parameters on the TC of armchair and zigzag α-GNTs are systematically analyzed. The results reveal that both armchair and zigzag α-GNTs exhibit TC coefficients of approximately 1 W/mK, which is significantly lower than that of carbon nanotubes (CNTs). Additionally, it is observed that nanotubes with larger diameters possess higher TC coefficients. The analysis further indicates that an increase in the number of walls leads to a reduction in the TC coefficient. Moreover, at identical diameters and lengths, the influence of stacking order on the TC of double-walled nanotubes is negligible.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 3","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143632337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Near-extremal dumb holes and some aspects of the Hawking effect","authors":"Akshat Pandey","doi":"10.1140/epjp/s13360-025-06160-z","DOIUrl":"10.1140/epjp/s13360-025-06160-z","url":null,"abstract":"<div><p>We propose novel non-relativistic fluid analogue models, which is dumb hole models, for extremal and near-extremal black holes. Further, we study the back-reaction effects of analogue Hawking radiation emitted from these dumb holes. We discuss and quantify the reduction in the background fluid velocity caused by radiation of Hawking phonons. In doing so, we speculate on the existence of an emergent Hawking force which leads to the reduction in the background fluid velocity and which is produced as a consequence of phonon emission. In addition to the analogue gravity literature, our results might be of relevance to black hole pedagogy.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 3","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143632336","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Spatial shifts of reflected beam from the twisted α-vanadium pentoxide/hexagonal boron nitride hyperbolic metamaterial","authors":"Rongyang Cui,&nbsp;Song Bai,&nbsp;Yubo Li,&nbsp;Lifeng Feng,&nbsp;Shufang Fu,&nbsp;Sheng Zhou,&nbsp;Qiang Zhang,&nbsp;Xuanzhang Wang","doi":"10.1140/epjp/s13360-025-06177-4","DOIUrl":"10.1140/epjp/s13360-025-06177-4","url":null,"abstract":"<div><p>In this work, we proposed a twisted biaxial hyperbolic structure which is composed of α-vanadium pentoxide (α-V₂O₅) with semi-infinite uniaxial hyperbolic material hexagonal boron nitride (hBN). The two hyperbolic principal axes of α-V₂O₅ are located within the propagation plane, resulting in some unusual phenomena. We study the transverse Goos–Hänchen (GH) and longitudinal Imbert–Fedorov (IF) shifts on the α-V₂O₅/hBN hyperbolic metamaterial (HMM) surface theoretically under the incidence of Gaussian beams in three different geometries (Geometry-I, II, and III). By adjusting the thickness of the α-V₂O₅ film and twist angle of the incident plane, we can obtain the maximum of GH shift about <span>(929.2{ lambda }_{0})</span>. On the other hand, by adjusting the left-handed and right-handed circularly polarized light and the twist angle, the positive and negative symmetry properties of the IF shift can be controlled. The electric field distribution simulated by using Comsol Multiphysics software further verify the above conclusions.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 3","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143622098","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Explicit wave solutions profile of (3+1)-dimensional Bateman–Burgers equation via bilinear neural network method","authors":"Muhammad Qasim,&nbsp;Yao Fengping,&nbsp;Muhammad Zafarullah Baber","doi":"10.1140/epjp/s13360-025-06159-6","DOIUrl":"10.1140/epjp/s13360-025-06159-6","url":null,"abstract":"<div><p>This article explores the (3+1)-dimensional Bateman–Burgers equation using the bilinear neural network technique. Single and double layers of neural networks are built to construct different bilinear neural network models such as “4-3-1” and “4-2-2-1” by using specific activation functions. The interaction solution and periodic type-l solutions were extracted for this equation. The (3+1)-dimensional Bateman–Burgers equation has many applications in traffic flow, fluid mechanics, gas dynamics, and nonlinear acoustics. For enhancing the graphical representation of the dynamic behavior and the physical attributes of particular solutions, the computing tool Mathematica 13.1 was used for generating 3D visualizations, 2D graphical representations, and density mappings. The methodology used in this article improves the study of nonlinear partial differential equations that arise in different complex phenomena. In the end, we believe that these solutions will play a role in the understanding of some high-order equation nonlinear phenomena.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 3","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143629710","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"The linear relations between the complex moduli and using the linear relations reduce the stabilization equations for supersymmetric black holes in N=2 theory","authors":"Dafa Li","doi":"10.1140/epjp/s13360-025-06162-x","DOIUrl":"10.1140/epjp/s13360-025-06162-x","url":null,"abstract":"<div><p>In [Phys. Rev. D 54, 6293 (1996)], the black hole entropy was derived by solving the matrix equation obtained from the stabilization equations for the solution of frozen moduli. In this paper, by directly solving the stabilization equations for the solution of frozen moduli without using the matrix equation, we find linear relations between any two of the three complex moduli at the black hole horizon. So far, no one discusses the linear relations. Via the linear relations, we derive the unique solution of frozen moduli and reduce the stabilization equations in three different ways. For example, the eight stabilization equations in [Phys. Rev. D 54, 6293 (1996)] can be replaced equivalently with three equations, the solution of moduli <span>(z_{1})</span> and two linear relations, which are much simpler and more intuitive.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 3","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143621777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Quality optimization of neutron and gamma concrete shields doped with galena, hematite and limonite for Am-Be neutron source and 137Cs and 60Co gamma sources using experimental method and Monte Carlo simulation","authors":"Seyyed Mohsen Mortazavi Shahroudi,&nbsp;Tavakoli Hassan,&nbsp;Pourimani Reza,&nbsp;Goodarzi Masumeh,&nbsp;Saeed Ghahani,&nbsp;Pouriya Behzad","doi":"10.1140/epjp/s13360-025-06040-6","DOIUrl":"10.1140/epjp/s13360-025-06040-6","url":null,"abstract":"<div><p>This study aims to find the optimal combination ratio for different minerals in the concrete radiation shield structure. In this study, we defined the quality factor (QF) of concrete radiation shielding through experimental methods and Monte Carlo simulations. This quality factor is calculated as the product of the linear attenuation coefficients for neutron radiation (µ_n) and gamma radiation (µ_γ), along with the compressive strength of the concrete. We compared these values for samples of galena, limonite and hematite. So far, much research has been conducted in this field; in other past research, a few numbers of samples with different compositions have been examined. However, in this study, different concentrations of the mentioned minerals were examined and a graph of various parameters was drawn, which provides researchers with comprehensive data for the mixing ratio of different materials in the construction of concrete shields. The Am-Be neutron source and the ¹³⁷Cs and ⁶⁰Co gamma sources were considered as laboratory and simulation sources. According to the results, by increasing the concentration of minerals in concrete, its µ_γ increases. And by increasing the concentration of these minerals up to a certain value, its ability to attenuation the neutron beam is strengthened. Due to the presence of hydrogen atoms in the limonite structure, with the increase in the concentration of this mineral in the concrete shield, its µ_n always increases. But in galena and hematite shields, after the certain concentration of these minerals, not only their neutron attenuation ability is no longer increased, but also even decreases for galena samples. The sample G₄₀ has the highest QF. To optimizing the weight of the shield, the comparison of QF/ρ values has been done and the results show that samples H₄₀, H₅₀, H₆₀, G₃₀, G₄₀ and L₃₀ have best QF/ρ value and they are suitable options to make the concrete radiation shield for various nuclear centers.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 3","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143622129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Soliton solutions, sensitivity analysis, and multistability analysis for the modified complex Ginzburg-Landau model","authors":"Bahadır Kopçasız,&nbsp;Emrullah Yaşar","doi":"10.1140/epjp/s13360-025-06178-3","DOIUrl":"10.1140/epjp/s13360-025-06178-3","url":null,"abstract":"<div><p>This study mainly focuses on finding new soliton solutions for a modified complex Ginzburg-Landau equation. This model describes the wave profile shown in different physical systems. To begin with, we apply an analytical algorithm, namely the extended modified auxiliary equation mapping method to investigate the complex wave structures for abundant solutions related to the modified complex Ginzburg-Landau model. Complex wave structures have a wider range of solutions, stemming from nonlinear models, featuring more intricate dynamics, necessitating advanced modeling techniques, and posing greater challenges in validation and optimization compared to traditional wave solutions. The complex wave conversion is considered to make a differential equation. Various types of solutions to the underlying equation, including solutions trigonometric, hyperbolic, and exponential, have been realized in the study. Secondly, the planer system is extracted from the given equation. Later, the considered equation’s sensitivity is examined using sensitivity analysis. The multistability analysis is also presented at the end after including a perturbed term. Numerical simulations are included with the analytical results to improve understanding of the solutions’ dynamic behavior. Our newly obtained solutions profoundly impact the improvement of new theories of fluid dynamics, mathematical physics, soliton dynamics, optical physics, quantum mechanics, and some other physical and natural sciences. To the best of our knowledge, this is the first time that the methods we present are used for the equation we consider. All obtained solutions are verified for validity using the Maple software program.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 3","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjp/s13360-025-06178-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143612286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

{"title":"Thermodynamic analysis of charged black hole with quantum corrections in deformed Jackiw–Teitelboim gravity: stability and phase transitions in the light of T-S criticality through entropy corrections","authors":"Arpan Bhattacharya,&nbsp;Mayukh Bandyopadhyay,&nbsp;Akash Sengupta","doi":"10.1140/epjp/s13360-025-06163-w","DOIUrl":"10.1140/epjp/s13360-025-06163-w","url":null,"abstract":"<div><p>The current work is focused on the investigation of the thermal stability and phase transitions of the charged black holes due to the quantum corrections of thermodynamic parameters under the deformed 2<i>D</i> dilaton gravity. Thermodynamic behavior of the charged black hole parameters under quantum corrections also has been observed. Black hole solutions for such a spacetime have been derived to represent the black hole mass as a function of the radius of the event horizon. At the same time, logarithmic corrections of the black hole entropy also have been incorporated. This newly obtained entropy again modifies the radius of the event horizon as well. This also exhibits a crucial impact on the black hole temperature as the temperature shows a quick change during the phase transitions with this modification. In addition, different temperature-entropy <span>((T-S))</span> criticalities are studied. Possibilities of different types of phase transitions are also speculated through the study of the specific heat. Further, some arguments on the geometrical thermodynamic behavior for the proposed system are made regarding the bound, stability and phase transitions. Significantly, the region of divergence of the black holes for the corresponding Ricci has been found and explored. Again, the study of Gibbs free energy gives different important cuspidal nodes. The physical significance of these cusps is also discussed. We have achieved an explicit scenario of the thermal stability and phase evolution of the charged black holes under quantum corrections under the deformed 2<i>D</i> dilaton gravity.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 3","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143621789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Solute dispersion in an electroosmotic flow of Carreau and Newtonian fluids through a tube: analytical study","authors":"Yogesh Kuntal,&nbsp;Neelima Ghiya,&nbsp;Ashish Tiwari","doi":"10.1140/epjp/s13360-025-06090-w","DOIUrl":"10.1140/epjp/s13360-025-06090-w","url":null,"abstract":"<div><p>The study presents a comprehensive theoretical analysis of solute transport under the electroosmotic flow of a two-fluid model consisting of Carreau–Newtonian fluids in a cylindrical tube, to predict more accurate dispersion dynamics. To accommodate the broader physical situation, the induced streaming potential resulting from a gradient in ion accumulation along the flow direction owing to the convective transport is considered. The analysis specifically accounts for the effect of slip and no-slip boundary conditions at the tube wall, addressing hydrophobic and hydrophilic properties of the Newtonian fluid, respectively. For the hydrophobic case, the influence of slip flow on the solid–liquid interface is considered, leading to the slip-dependent zeta potential. The closed-form solution of the velocity profile is obtained using the perturbation technique, assuming the Weissenberg number as the small perturbation parameter for both slip and no-slip formulations. The combined advection–diffusion equation for solute transport is addressed using a hybrid method incorporating Gill’s approach and the Hankel transformation to obtain the analytical expressions for the dispersion coefficient, mean concentration, and concentration distributions. The apparent slip-dependent zeta potential within the electric double layer due to the slip flow at the wall is shown to have a significant impact on the dispersion dynamics. The study examines the impact of various dynamic parameters, namely the Carreau fluid parameters (Weissenberg number and power law index), zeta potential at the wall, inverse Debye length, viscosity ratio parameter, and slip length, on the concentration distribution through convection, ultimately affecting the dispersion coefficient. The effect of wall slip condition on the solute plume distribution is more pronounced at the higher time level. It is noted that the effect of all the dynamical parameters on solute dispersion is observed to be more significant for the slip-dependent zeta potential at the wall compared to the no-slip condition at the wall. The findings of this work have broad implications in biomedical engineering, drug delivery systems, chemical mixing, and separation processes.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 3","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143621825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Rotary photon drag at the earth’s rotation rate in a Sagnac interferometer","authors":"Sana Ullah,&nbsp;Arif Ullah,&nbsp;M. Imtiaz Khan,&nbsp;Ashfaq Ahmad,&nbsp;Imran Khan","doi":"10.1140/epjp/s13360-025-06173-8","DOIUrl":"10.1140/epjp/s13360-025-06173-8","url":null,"abstract":"<div><p>Our own earth rotates with a moderate angular velocity of <span>(7.2921159times 10^{-5})</span> rad/sec and completes one revolution approximately in 23 hours 56 minutes and 4.09 seconds, which is also known as a sidereal day. In this work, rotary photon drag (RPD) is theoretically investigated at the earth’s rotation rate in a Saganac interferometer (SI) using a double-V-type rubidium atomic system within the interferometer. RPD angles reach to a maximum of <span>(pm 1times 10^{-10})</span>, <span>(pm 2times 10^{-10})</span> and <span>(pm 3times 10^{-10})</span> radians. RPD is examined to be function of probe field detuning, phase angles, and control fields strength. Electric susceptibility, group refractive index, and relativistic group velocities are examined. Electromagnetically induced transparency (EIT) is observed at the specific values of population probability in the two ground states. These results may find potential applications in rotation sensing and special imaging/coding technology.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 3","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143621778","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}