The European Physical Journal Plus最新文献_第10页

Soliton excitation in a weak relativistic quantum plasma 弱相对论量子等离子体中的孤子激发

IF 2.8 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-05-05 DOI: 10.1140/epjp/s13360-025-06098-2

L. Rajaei, S. Miraboutalebi

{"title":"Soliton excitation in a weak relativistic quantum plasma","authors":"L. Rajaei, S. Miraboutalebi","doi":"10.1140/epjp/s13360-025-06098-2","DOIUrl":"10.1140/epjp/s13360-025-06098-2","url":null,"abstract":"<div><p>In a weakly relativistic plasma, the influence of quantum mechanics becomes evident through a finite Fermi temperature despite moderately high particle velocities, indicating a degenerate electron gas with significant quantum pressure. The plasma’s inherent nonlinearity allows for forming and propagating solitons, which are self-localized wave packets. The quantum considerations modify solitons’ dispersion and stability compared to a purely classical plasma. However, the ideal picture is often challenged by various interactions that can be incorporated into such a plasma. The effects of exchange, viscosity, and collision, as some inevitable interactions, are studied here to provide a more realistic picture of the soliton excitations in the plasma. The model’s analytical solutions are obtained through the Tanh approach in a perturbation manner. This approach is adopted considering the theory’s nonlinearity and is different from the conventional perturbation methods of linearization. The results show that viscosity and collision or dissipation are correlated and interdependent, so the viscosity coupling constant is four times the dissipation coupling constant. Also, the viscosity and dissipation have diminished effects and reduce the amplitude of the vector potential, while the exchange considerations have intensifying consequences.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 5","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904684","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}

引用次数: 0

Derivation, nonlocal symmetry analysis, and exact solutions of modified Broer-Kaup equations 修正Broer-Kaup方程的推导、非局部对称分析及精确解

IF 2.8 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-05-05 DOI: 10.1140/epjp/s13360-025-06302-3

Jinzhou Liu, Zhaowen Yan

引用次数: 0

Self-controlled channeling of relativistic electron flux and associated nuclear processes induced by a powerful polarized laser pulse acting on a crystal 由作用于晶体上的强偏振激光脉冲诱导的相对论性电子通量的自我控制通道和相关的核过程

IF 2.8 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-05-04 DOI: 10.1140/epjp/s13360-025-06304-1

Vladimir Vysotskii, Mykhaylo Vysotskyy

{"title":"Self-controlled channeling of relativistic electron flux and associated nuclear processes induced by a powerful polarized laser pulse acting on a crystal","authors":"Vladimir Vysotskii, Mykhaylo Vysotskyy","doi":"10.1140/epjp/s13360-025-06304-1","DOIUrl":"10.1140/epjp/s13360-025-06304-1","url":null,"abstract":"<div><p>The formation, motion characteristics and potential applications of a superdense flux of fast electrons generated in a crystal under the direct action of a polarized, powerful laser pulse applied to the crystal surface are investigated. It is demonstrated that under specific orientations of the laser pulse, multiple planar channeling of these electrons occurs in opposite transverse directions. The energy of these electrons reaches relativistic values. For the first time, the significant decelerating effect of the alternating magnetic field generated by the modulated electron beam—formed and controlled by the intense laser—on the acceleration process has been taken into account. A method for completely suppressing this braking effect is proposed. The possible results of interactions of periodically directed channeling electrons with the nuclei and atoms of a \"frozen\" crystal lattice are listed and considered, including such well known phenomena as nuclear excitation, the creation of population inversions in the internal X-ray states of atoms, the inverse beta decay of nuclei inside the crystal, as well as potential modeling of the formation of neutron stars during gravitational collapse.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 5","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143902814","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}

引用次数: 0

DFT study of (6,0) boron nitride nanotube as a drug delivery system for 5-fluorouracil and hydroxyurea （6,0）氮化硼纳米管作为5-氟尿嘧啶和羟基脲给药系统的DFT研究

IF 2.8 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-05-04 DOI: 10.1140/epjp/s13360-025-06296-y

Ali Bizaval, Zahra Karami Horastani, S. Javad Hashemifar

{"title":"DFT study of (6,0) boron nitride nanotube as a drug delivery system for 5-fluorouracil and hydroxyurea","authors":"Ali Bizaval, Zahra Karami Horastani, S. Javad Hashemifar","doi":"10.1140/epjp/s13360-025-06296-y","DOIUrl":"10.1140/epjp/s13360-025-06296-y","url":null,"abstract":"<div><p>This study explores the potential of (6,0) boron nitride nanotube (BNNT60) as an efficient nanocarrier for the anticancer drugs 5-FU (Fluorouracil) and HU (Hydroxyurea) using dispersion-corrected density functional theory (DFT) via the Quantum-ESPRESSO package. The adsorption process is exothermic<b>,</b> with adsorption energies of −0.93 eV (5-FU) and −0.35 eV (HU)<b>,</b> ensuring stable drug attachment while preserving molecular integrity. A comprehensive electronic structure analysis demonstrates that drug adsorption significantly modulates the Fermi level and work function of BNNT60, highlighting its potential as a dual-function platform for drug delivery and molecular sensing. Furthermore, the drug release mechanism is investigated under acidic conditions (H⁺ presence), mimicking the tumor microenvironment. The observed increase in equilibrium adsorption distances from 3.2 to 8.3 Å (5-FU) and from 3.4 to 8.7 Å (HU) confirms that BNNT60 can effectively trigger controlled drug release in response to pH variations<b>.</b> These findings underscore the unique potential of BNNT60 as a smart nanocarrier for targeted anticancer therapy, offering a novel approach for pH-sensitive drug delivery.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 5","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143902813","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}

引用次数: 0

Research on nonlinear robust control strategy for active support of grid-forming photovoltaic frequency 光伏并网频率主动支持的非线性鲁棒控制策略研究

IF 2.8 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-05-04 DOI: 10.1140/epjp/s13360-025-06316-x

Jinyu Guo, Shuai Zhang, Shengxuan Wang

{"title":"Research on nonlinear robust control strategy for active support of grid-forming photovoltaic frequency","authors":"Jinyu Guo, Shuai Zhang, Shengxuan Wang","doi":"10.1140/epjp/s13360-025-06316-x","DOIUrl":"10.1140/epjp/s13360-025-06316-x","url":null,"abstract":"<div><p>In a grid-connected photovoltaic (PV) power generation system, variations in the external environment or fluctuations in system load may trigger instability in the grid frequency, leading to frequency oscillations. This poses a challenge to the system’s steady operation. To enhance the frequency response rate and stability of grid operation, this paper proposes a virtual synchronous generator (VSG) control strategy based on extended state observer (ESO) and terminal sliding mode control (TSMC). An AC microgrid system based on grid-connected PV power generation is constructed using MATLAB simulation software. Based on the VSG control technique and nonlinear robust control theory, the VSG controller of the inverter is designed and optimized, and the ESO and TSMC are integrated into the active frequency controller, aiming to promote the control performance of the system. By comparing and analyzing the simulation results with the common controller, the VSG control with improved control strategy can not only achieve the function of micro-network frequency adjustment but also effectively improve the transient frequency stability and reduce the system frequency fluctuation.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 5","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143902812","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}

引用次数: 0

On the exact traveling wave solutions to the Akbota-Gudekli-Kairat-Zhaidary equation and its numerical solutions Akbota-Gudekli-Kairat-Zhaidary方程的行波精确解及其数值解

IF 2.8 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-05-03 DOI: 10.1140/epjp/s13360-025-06289-x

Reda A. Ibrahim, Ahmet Bekir, Emad H. M. Zahran

{"title":"On the exact traveling wave solutions to the Akbota-Gudekli-Kairat-Zhaidary equation and its numerical solutions","authors":"Reda A. Ibrahim, Ahmet Bekir, Emad H. M. Zahran","doi":"10.1140/epjp/s13360-025-06289-x","DOIUrl":"10.1140/epjp/s13360-025-06289-x","url":null,"abstract":"<div><p>In this work, we will study one of the notable integrable models, the Akbota-Gudekli-Kairat-Zhaidary Equation, which belongs to a class of integrable space curves and surfaces. It exhibits a wide range of traveling wave solutions, facilitated by the existence of a Lax pair associated with the nonlinear differential equation. The primary focus of this article is the extraction of the exact traveling wave solutions of this model for the first time, employing two distinct semi-analytical techniques, namely the <span>((G^{prime}/G))</span>-expansion method and the Paul-Painlevé approach method. Throughout these two suggested universal techniques, various types of exact traveling wave solutions such as W-like soliton solution, M-like soliton solution, Bright soliton solution, Dark soliton solution, hyperbolic function soliton solution and other rational soliton solutions have been attained. Besides the two semi-analytic methods, the well-known simple and efficient numerical method called the differential transform method is taking into account to introduce the numerical approximation corresponding to the semi-analytical solutions obtained previously. To illustrate the consistent between the exact traveling wave solutions and numerical solutions we demonstrate the plot the 2D and 3D graphs that explore the dynamical behaviors of the extracted exact traveling wave solutions. The realized solutions show the dynamic properties of the soliton arising from the suggested model and will help to introduce future studies for all related phenomena.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 5","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143900832","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}

引用次数: 0

Using a quantum SWAP engine to experimentally validate thermodynamic uncertainty relations 利用量子SWAP引擎实验验证热力学不确定性关系

IF 2.8 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-05-02 DOI: 10.1140/epjp/s13360-025-06276-2

Krishna Shende, Arvind, Kavita Dorai

引用次数: 0

The dynamical characteristics of interaction solutions for the KP equation describing Rossby waves 描述罗斯比波的KP方程相互作用解的动力学特性

IF 2.8 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-05-02 DOI: 10.1140/epjp/s13360-025-06275-3

RuiYue Li, XiaoJun Yin, Ruigang Zhang, QuanSheng Liu

{"title":"The dynamical characteristics of interaction solutions for the KP equation describing Rossby waves","authors":"RuiYue Li, XiaoJun Yin, Ruigang Zhang, QuanSheng Liu","doi":"10.1140/epjp/s13360-025-06275-3","DOIUrl":"10.1140/epjp/s13360-025-06275-3","url":null,"abstract":"<div><p>The extreme weather caused by Rossby waves has been receiving increasing attention due to the presence of the Coriolis force. In this paper, we start with the material conservation equation, utilize the coordinate transformation and the perturbation expansion method to derive the high-dimensional Kadomtsev–Peviashvili equation. N-soliton solutions and K-lump solutions are obtained via the bilinear method and the long-wave limit method. Then, we construct the appropriate auxiliary function to study interaction solutions formed by the above two solutions. By choosing suitable parameters, we gain a clear understanding of the movement trajectories of N-soliton solutions, K-lump solutions, and interaction solutions formed of the above two solutions in different times. It is also evident that the shapes of the solutions do not change during the movement, but when they collide with each other, the amplitude of the solutions will increase significantly. And with the change of time <span>(T,)</span> the relative positions of N-soliton solutions and K-lump solutions will also change.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 5","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143896777","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}

引用次数: 0

Harnessing the synergistic potential of coprecipitation-induced Ag3PO4 nanoparticles for environmental and biological contamination 利用共沉淀诱导的Ag3PO4纳米颗粒对环境和生物污染的协同潜力

IF 2.8 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-04-30 DOI: 10.1140/epjp/s13360-025-06256-6

Mohd Imran, Mubarak A. Eldoma, Nasser Zouli, Salah Eldeen F. Hegazi, Mohamed Hassan, Humaira Parveen, Sayeed Mukhtar, Bhagyashree R. Patil, Muhammad Shahid Rashid, Khatib Sayeed Ismail, Syed Kashif Ali

{"title":"Harnessing the synergistic potential of coprecipitation-induced Ag3PO4 nanoparticles for environmental and biological contamination","authors":"Mohd Imran, Mubarak A. Eldoma, Nasser Zouli, Salah Eldeen F. Hegazi, Mohamed Hassan, Humaira Parveen, Sayeed Mukhtar, Bhagyashree R. Patil, Muhammad Shahid Rashid, Khatib Sayeed Ismail, Syed Kashif Ali","doi":"10.1140/epjp/s13360-025-06256-6","DOIUrl":"10.1140/epjp/s13360-025-06256-6","url":null,"abstract":"<div><p>Silver phosphate (Ag<sub>3</sub>PO<sub>4</sub>)<sub>,</sub> often known as silver phosphate, has recently been the subject of research due to its role in deactivating microorganisms and breaking down organic and inorganic pollutants. This is attributed to its high quantum yield. In the following study, we synthesized Ag<sub>3</sub>PO<sub>4</sub> nanoparticles (NPs) by a simple and easy coprecipitation route to study its photocatalytic and antibacterial proficiency against Alizarin Red S and various pathogens, respectively. The synthesized sample was characterized using X-ray diffractometry (XRD), energy-dispersive X-ray spectroscopy (EDX), scanning electron microscope (SEM), and X-ray photoelectron spectroscopy (XPS) analysis. The photocatalytic degradation experiment shows 85% alizarin red S dye degradation by using 5 mg catalyst. The pH 7 was found to be optimal for photodegradation as compared to acidic or alkaline pH. The concentration and time graph showed that the degradation rate also increased with the increase of time. Furthermore, various bacterial and fungal pathogens were used to evaluate the antimicrobial and antifungal activities of Ag<sub>3</sub>PO<sub>4</sub>. The findings demonstrated the broad-spectrum antibacterial activity of Ag₃PO₄. Minimum inhibitory concentration (MIC) confirms that increasing nanoparticle (NP) concentration improved pathogen inhibition. The results also showed that the lowest fungal inhibition concentration for <i>Candida albicans</i> fungus was 14 mm, whereas the highest bacterial inhibition concentration against <i>Methicillin-resistant Staphylococcus aureus</i> was 25 mm.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 4","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892689","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}

引用次数: 0

Modulational instability and kink, anti-kink, breather soliton for nonlocal reverse space time dispersive nonlinear Schrödinger equation 非定域逆时空色散非线性Schrödinger方程的调制不稳定性与扭结、反扭结、呼吸孤子

IF 2.8 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-04-30 DOI: 10.1140/epjp/s13360-025-06292-2

Parasuraman E, M. S. Mani Rajan, M. S. Osman

{"title":"Modulational instability and kink, anti-kink, breather soliton for nonlocal reverse space time dispersive nonlinear Schrödinger equation","authors":"Parasuraman E, M. S. Mani Rajan, M. S. Osman","doi":"10.1140/epjp/s13360-025-06292-2","DOIUrl":"10.1140/epjp/s13360-025-06292-2","url":null,"abstract":"<div><p>In this paper, we examine the soliton solutions of a new form of the nonlocal reverse space time dispersive nonlinear Schrödinger equation which describes the propagation of solitons in optical fiber. We also aim to understand the role of higher-order dispersion in the dynamics of solitons in optical fibers. Hence, the proposed equation is solved with the help of <span>(Bigl (frac{G^{prime }}{G^2}Bigr ))</span>-expansion method, and some novel solutions are presented for local and nonlocal field. The role of higher-order dispersion on the dynamics of the soliton in optical fiber is discussed both in the absence and in the presence of nonlinear dispersion. We analyze the physical parameters responsible for the evolution of local and nonlocal soliton solutions in optical fiber. We also explore the stability of solutions of dynamical equation using linear stability analysis. The stability of the soliton solutions is presented using the modulational instability gain, and the role of physical parameters on the stability of solutions is also discussed.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 4","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892690","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}

引用次数: 0