Brazilian Journal of Physics最新文献_第2页

Tuning the Disorder Structure of Complex Plasmas Using an Electric Field

IF 1.5 4区物理与天体物理

Brazilian Journal of Physics Pub Date : 2024-12-08 DOI: 10.1007/s13538-024-01666-w

Muhammad Asif Shakoori, Misbah Khan, Haipeng Li, Syed Ali Raza, Muhammad Riaz

{"title":"Tuning the Disorder Structure of Complex Plasmas Using an Electric Field","authors":"Muhammad Asif Shakoori, Misbah Khan, Haipeng Li, Syed Ali Raza, Muhammad Riaz","doi":"10.1007/s13538-024-01666-w","DOIUrl":"10.1007/s13538-024-01666-w","url":null,"abstract":"<div>In this study, an electric field (E*) has been used to tune the disorder structures of complex plasmas (CPs) using molecular dynamics (MD) simulations. The ψ(τ) (lattice correlation) and RDF (radial distribution function) are computed for CPs under the presence and absence of different E* intensities to analyze structures. The influence of E* strengths, coupling (Γ), and screening length (κ) on structure transitions is investigated. Without E*, MD simulation results for ψ(τ) and RDF indicated self-organization of dust particles with increasing Γ and decreasing κ. Additionally, CPs subjected to higher E* intensities exhibited signs of condensation and solidification. Achieving solidification required a significantly higher E* intensity for disordered structures (nonideal gases), whereas liquid-like or nearly solid-like structures required intermediate to low E* intensities. Moreover, to induce crystalline long-range order in the presence of E*, by keeping the Γ constant, higher values of κ required a larger E*. It was observed that CPs exhibited behavior akin to conventional electrorheological fluids in the presence of E*. This characteristic renders CPs valuable for investigating electrorheological properties in soft and condensed matter physics.</div>","PeriodicalId":499,"journal":{"name":"Brazilian Journal of Physics","volume":"55 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142790312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Emulation of Optical Binary to Gray Code Converter and Even/Odd Parity Checker Circuit Using Electro-optic Effect-Based Directional Couplers

IF 1.5 4区物理与天体物理

Brazilian Journal of Physics Pub Date : 2024-12-07 DOI: 10.1007/s13538-024-01645-1

Ajay Yadav, Ajay Kumar, Amit Prakash

{"title":"Emulation of Optical Binary to Gray Code Converter and Even/Odd Parity Checker Circuit Using Electro-optic Effect-Based Directional Couplers","authors":"Ajay Yadav, Ajay Kumar, Amit Prakash","doi":"10.1007/s13538-024-01645-1","DOIUrl":"10.1007/s13538-024-01645-1","url":null,"abstract":"<div>The utilization of optical directional couplers has emerged as a viable alternative to conventional systems for the execution of error detection using optical signals. The proposed circuit efficiently converts 4-bit binary input signals to gray code representation in the optical domain, reducing errors during transmission and computation. An even/odd parity checker module is also included in the circuit, which improves data integrity and detects single-bit errors in transmitted data. The theoretical basis for the electro-optic effect and its use in directional couplers (EODC) for optical signal transmission inside the proposed circuit. The framework for sophisticated efficient photonic circuit designs with improved error detection and correction capabilities is laid by using EODC, which simplify design and enable seamless integration with existing optical communication technologies. The proposed device layout is made of (GaAlAs) material produced from a (3mu mtimes 3um) modulator. The coupling length ({(L}_{C})) of the device is set to ({L}_{C}=1text{ cm}). The EODC performs perfect switching with a light wavelength of (900text{ nm}) by creating a refractive index change ((Delta n)) of approximately (Delta ncong 1times {10}^{-4}). An electric field magnitude of approximately (3times {10}^{4}text{ V}/text{cm}) is required to achieve this switching, which corresponds to a voltage of 10 V applied across the electrodes of an EODC over a (3 mu text{m}) channel.</div>","PeriodicalId":499,"journal":{"name":"Brazilian Journal of Physics","volume":"55 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142790370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Exploring the Physical, Electrical and Optical Properties of Cs2LiInBr6 Perovskite: An Extensive study Utilizing DFT Based GGA-PBE and HSE06 Functionals

IF 1.5 4区物理与天体物理

Brazilian Journal of Physics Pub Date : 2024-12-05 DOI: 10.1007/s13538-024-01653-1

Krishna Kumar Mishra

{"title":"Exploring the Physical, Electrical and Optical Properties of Cs2LiInBr6 Perovskite: An Extensive study Utilizing DFT Based GGA-PBE and HSE06 Functionals","authors":"Krishna Kumar Mishra","doi":"10.1007/s13538-024-01653-1","DOIUrl":"10.1007/s13538-024-01653-1","url":null,"abstract":"<div>We performed a thorough investigation of the structural, mechanical, electrical, and optical characteristics of the lead-free perovskite Cs2LiInBr6 by employing the Density Functional Theory (DFT) methods. Our analysis included the use of GGA-PBE and HSE06 functionals. Our results validate that Cs2LiInBr6 forms a cubic Fm̅3m space group with a lattice constant of 11.09 Å, which is consistent with earlier theoretical and experimental investigations. The material possesses a direct bandgap at 1.50 eV and 2.34 eV, calculated by GGA-PBE and HSE06 methods respectively. This shows that the material is suitable for solar cell and optoelectronic applications. Finally, the substantial UV and visible region absorption (90,455 cm−1 with GGA-PBE) observed for Cs2LiInBr6 makes it an attractive material for solar applications. The moderate level of compressibility and ductile nature of the mechanical properties further validate the structural integrity of Cs2LiInBr6. The details of the physical properties including mechanical, electrical, optical, and structural features suggest that Cs2LiInBr6 is a promising material for photovoltaic as well as optoelectronic applications.</div>","PeriodicalId":499,"journal":{"name":"Brazilian Journal of Physics","volume":"55 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142778531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Investigation of Nonlinear Cylindrical Electrostatic Excitations in Dense Quantum Astrophysical Plasmas

IF 1.5 4区物理与天体物理

Brazilian Journal of Physics Pub Date : 2024-12-05 DOI: 10.1007/s13538-024-01655-z

M. Shan Tariq, W. Masood, Weaam Alhejaili, L. S. El-Sherif, S. A. El-Tantawy

{"title":"Investigation of Nonlinear Cylindrical Electrostatic Excitations in Dense Quantum Astrophysical Plasmas","authors":"M. Shan Tariq, W. Masood, Weaam Alhejaili, L. S. El-Sherif, S. A. El-Tantawy","doi":"10.1007/s13538-024-01655-z","DOIUrl":"10.1007/s13538-024-01655-z","url":null,"abstract":"<div>It is imperative for many problems of physical interest to incorporate the geometrical curvature. Examples include plasma physics, oceanography, nonlinear optics, and laser-driven systems. Therefore, we consider planar wave propagation in a cylindrical geometry in light of the aforementioned applications, and the propagation is considered solely in the radial direction. Using the small amplitude perturbation approximation, the cylindrical Korteweg-de Vries (CKdV) equation is obtained using multiple-scale analysis to study nonlinear ion-acoustic waves in a dense plasma with electron trapping by incorporating the effects of the quantizing magnetic field and the smearing effects of the Fermi distribution function. The Bäcklund transformation is employed to obtain single and multiple soliton solutions of the CKdV equation, which are found to be very different from the planar KdV equation. A general mathematical framework is also presented to find the N-soliton solutions. The effects of the quantizing magnetic field and finite electron temperature on the structure of the cylindrical ion-acoustic solitons are also explored using the parameters representative of white dwarf stars. This research endeavor is expected to trigger interest in the plasma community to pursue this fascinating and abstruse research direction.</div>","PeriodicalId":499,"journal":{"name":"Brazilian Journal of Physics","volume":"55 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142778530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Baryon Acoustic Oscillations from Galaxy Surveys

IF 1.5 4区物理与天体物理

Brazilian Journal of Physics Pub Date : 2024-12-05 DOI: 10.1007/s13538-024-01669-7

Paula Ferreira, Ribamar R. R. Reis

{"title":"Baryon Acoustic Oscillations from Galaxy Surveys","authors":"Paula Ferreira, Ribamar R. R. Reis","doi":"10.1007/s13538-024-01669-7","DOIUrl":"10.1007/s13538-024-01669-7","url":null,"abstract":"<div>We conducted a review of the fundamental aspects of describing and detecting the baryon acoustic oscillation (BAO) feature in galaxy surveys, emphasizing the optimal tools for constraining this probe based on the type of observation. Additionally, we included new results with two spectroscopic datasets to determine the best-fit model for the power spectrum, P(k). Using the framework described in a previous analysis, we applied this to a different sub-sample of the BOSS survey, specifically galaxies with redshifts (0.3<z<0.65). We also examined the eBOSS dataset with redshifts (0.6<z<1.0), adjusting the number of parameters in the traditional polynomial fit to account for the higher redshift range. Our results showed that the dilation scale parameter (alpha ) derived from the BOSS dataset had smaller error bars compared to the eBOSS dataset, attributable to the larger number of luminous red galaxies (LRGs) in the BOSS sample. We also compared our findings with other surveys such as WiggleZ, DES Y6, and DESI III, noting that photometric surveys typically yield larger error bars due to their lower precision. The DESI III results were in good agreement with ours within (1sigma ), with most bins close to unity. The variation of (alpha ) with respect to the redshift is an unresolved issue in the field, appearing in both three-dimensional and angular tomographic analyses.</div>","PeriodicalId":499,"journal":{"name":"Brazilian Journal of Physics","volume":"55 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142778529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

The Influence of Spheroidicity on the Complexity in Compact Objects Utilizing the Vaidya-Tikekar Superdense Star Model: A Comparative Study

IF 1.5 4区物理与天体物理

Brazilian Journal of Physics Pub Date : 2024-12-04 DOI: 10.1007/s13538-024-01663-z

Shyamal Kumar Pal, Shyam Das, Ankita Jangid

{"title":"The Influence of Spheroidicity on the Complexity in Compact Objects Utilizing the Vaidya-Tikekar Superdense Star Model: A Comparative Study","authors":"Shyamal Kumar Pal, Shyam Das, Ankita Jangid","doi":"10.1007/s13538-024-01663-z","DOIUrl":"10.1007/s13538-024-01663-z","url":null,"abstract":"<div>In this paper, we investigate how the geometrical parameter of spheroidicity, which quantifies the deviation from spherical symmetry, influences the complexity of self-gravitating, static systems. We employ the concept of complexity in self-gravitating systems as formulated by Herrera et al. (Phys. Rev. D 97, 044010, 2018) and apply it to various models of compact stellar structures, all set within the framework of the Vaidya-Tikekar (VT) background geometry. Specifically, we analyze three models: (i) the anisotropic compact stellar model by Das et al. (Gen. Relativ. Gravit. 52, 101, 2020), constrained by the Karmakar condition, (ii) the stellar model by Das et al. (Eur. Phys. J. C 84, 13, 2024) employing the VT metric ansatz under the vanishing complexity condition, and (iii) the compact stellar model using a polytropic equation of state with the VT metric ansatz (Baskey et al., New Astron. 108, 102164, 2024). These models were selected based on whether their solutions are complexity-free or not. We establish a connection between the complexity factor and the spheroidal parameter to analyze how pressure anisotropy and density inhomogeneity, as constituent components, are influenced by this geometric parameter. Our findings indicate that deviations from spherical symmetry lead to a marked increase in the complexity of the stellar structure for all the models based on VT metric ansatz. Moreover, our results indicate an inconsistent pattern in the dependence of the complexity factor ((varvec{Y}_{varvec{TF}})) and its components on spheroidicity ((varvec{K})), demonstrating that this relationship is both model-dependent and is not generic.</div>","PeriodicalId":499,"journal":{"name":"Brazilian Journal of Physics","volume":"55 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142778362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

A Short Review on Next-Generation Batteries: Energy Storage System

IF 1.5 4区物理与天体物理

Brazilian Journal of Physics Pub Date : 2024-12-04 DOI: 10.1007/s13538-024-01658-w

Poovitha Kanagaraj, Karthikeyan Balasubramanian

{"title":"A Short Review on Next-Generation Batteries: Energy Storage System","authors":"Poovitha Kanagaraj, Karthikeyan Balasubramanian","doi":"10.1007/s13538-024-01658-w","DOIUrl":"10.1007/s13538-024-01658-w","url":null,"abstract":"<div>The search for advanced energy storage devices has extensive research into batteries beyond the conventional lithium-ion battery. As we know, now researchers are actively exploring alternative energy storage technologies, focusing on abundant elements such as calcium (Ca), magnesium (Mg), sodium (Na), and zinc (Zn). These alternatives promise to reduce the limitations of lithium resources, offering potentially lower costs, higher resource availability, and diverse chemistries for various applications. This short review provides an overview of recent advancements in next-generation battery storage systems mainly on the alternate to Li-ion battery, focusing on innovations in battery chemistry, energy density, safety, and integration with renewable energy sources. The review explores the significance of enhancing battery technology for various uses like electric vehicles and large-scale energy storage systems. It emphasizes notable advancements and hurdles encountered in this domain. The various types of batteries and their anode, cathode, and electrolyte materials were discussed briefly, in the present review. The present work will be helpful for the budding researchers who work in the field of energy storage systems, to acquire a knowledge on the recent trends and future technology of battery storage systems towards the alternate solution for Li-ion battery.</div>","PeriodicalId":499,"journal":{"name":"Brazilian Journal of Physics","volume":"55 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142778365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

The Effect of Time Delay on the Dynamics of a Plankton-Nutrient System with Refuge

IF 1.5 4区物理与天体物理

Brazilian Journal of Physics Pub Date : 2024-12-03 DOI: 10.1007/s13538-024-01670-0

Kaushik Dehingia, Anusmita Das, Evren Hinçal, Kamyar Hosseini

{"title":"The Effect of Time Delay on the Dynamics of a Plankton-Nutrient System with Refuge","authors":"Kaushik Dehingia, Anusmita Das, Evren Hinçal, Kamyar Hosseini","doi":"10.1007/s13538-024-01670-0","DOIUrl":"10.1007/s13538-024-01670-0","url":null,"abstract":"<div>The interaction between aquatic organisms and plants is crucial to maintaining the ecological balance of the marine environment. This study aims to investigate the effects of providing refuge on phytoplankton and the delay in releasing hazardous substances by phytoplankton. To accomplish this, a nutrient-phytoplankton-zooplankton system was developed and analyzed to examine its equilibria and the conditions under which they exist. The model’s stability was also analyzed, both in the absence and presence of time delays. The inclusion of a time delay caused a Hopf bifurcation at the interior equilibrium of the model, resulting in a transition from stability to instability. The study found that as the time delay value increases, the system’s stable dynamics transition into an unstable state. However, because phytoplankton refuge is part of the system, the dynamics temporarily become stable, even though phytoplankton release the toxins over a long time. However, this stable behavior is disrupted when the time required for the toxin liberation process by phytoplankton is further extended.</div>","PeriodicalId":499,"journal":{"name":"Brazilian Journal of Physics","volume":"55 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142761967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Head-on Collision of Ion Acoustic Waves in Electron-Ion-Positron Plasmas with Trapped-Distributed Electrons

IF 1.5 4区物理与天体物理

Brazilian Journal of Physics Pub Date : 2024-11-30 DOI: 10.1007/s13538-024-01662-0

Alireza Abdikian, Uday Narayan Ghosh, Mohamad Eghbali

{"title":"Head-on Collision of Ion Acoustic Waves in Electron-Ion-Positron Plasmas with Trapped-Distributed Electrons","authors":"Alireza Abdikian, Uday Narayan Ghosh, Mohamad Eghbali","doi":"10.1007/s13538-024-01662-0","DOIUrl":"10.1007/s13538-024-01662-0","url":null,"abstract":"<div>This study examines the head-on collision of ion-acoustic solitons in a one-dimensional, hot, collisionless electron-positron-ion (e-p-i) plasma, incorporating mobile ions, (kappa )-distributed trapped electrons, and Maxwellian positrons. Using the modified Poincare-Lighthill-Kuo (PLK) method, we derive modified Korteweg-de Vries (mKdV) equations and analyze phase shifts in soliton trajectories post-interaction. Results reveal that only rarefactive electrostatic nonlinear waves can propagate within the range of parameters relevant to experiments, showing symmetrical soliton behavior during head-on collisions, with identical amplitude and width. Additionally, soliton amplitude is found to decrease as the electron spectral index ((kappa _e)) and positron-to-electron temperature ratio ((beta _e)) increase, with a sharp decline observed within the range (0<kappa _e<5). Phase shift analysis shows that smaller (kappa _e) values result in a steady increase in phase shifts, which becomes asymptotic as (kappa _e) grows, while phase shifts decrease with rising (sigma _i) (temperature ratio of ions to electrons). These results have practical applications in astrophysical and laboratory plasma environments where soliton interactions play a crucial role. Understanding head-on soliton collisions helps predict plasma behavior in environments such as the interstellar medium, fusion devices, and space plasmas, where wave stability, energy transport, and plasma heating are influenced by nonlinear interactions in systems with trapped particles and nonthermal distributions.</div>","PeriodicalId":499,"journal":{"name":"Brazilian Journal of Physics","volume":"55 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142754303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Entropy Production Along a Deterministic Motion

IF 1.5 4区物理与天体物理

Brazilian Journal of Physics Pub Date : 2024-11-30 DOI: 10.1007/s13538-024-01664-y

Mário J. de Oliveira

引用次数: 0