Brazilian Journal of Physics最新文献_第6页

Multiparty Simultaneous Quantum Identity Authentication: A Measurement-Device-Independent Approach 多方同时量子身份验证：与测量设备无关的方法

IF 1.5 4区物理与天体物理

Brazilian Journal of Physics Pub Date : 2024-09-16 DOI: 10.1007/s13538-024-01596-7

Yu-Guang Yang, Peng-Ze Yang, Guang-Bao Xu, Yi-Hua Zhou, Wei-Min Shi, Dan Li

引用次数: 0

Impact of Nonlocality Effects in Proton Optical Potential from Folding Model on (p)+(^{16})O Elastic Scattering at Low Energies 折叠模型质子光学势中的非偶性效应对低能量下 $$p$$ + $$^{16}$$ O 弹性散射的影响

IF 1.5 4区物理与天体物理

Brazilian Journal of Physics Pub Date : 2024-09-16 DOI: 10.1007/s13538-024-01608-6

Nguyen Hoang Phuc, Nguyen Tri Toan Phuc, Do Cong Cuong

引用次数: 0

Dielectric and Conductive Properties of ZnMoO4-TiO2: Exploring High-Temperature Performance and Application Potential ZnMoO4-TiO2 的介电性能和导电性能：探索高温性能和应用潜力

IF 1.5 4区物理与天体物理

Brazilian Journal of Physics Pub Date : 2024-09-13 DOI: 10.1007/s13538-024-01609-5

Subhangi Kalingani, Satyaprakash Narayan Das, Satyanaryan Bhuyan

{"title":"Dielectric and Conductive Properties of ZnMoO4-TiO2: Exploring High-Temperature Performance and Application Potential","authors":"Subhangi Kalingani, Satyaprakash Narayan Das, Satyanaryan Bhuyan","doi":"10.1007/s13538-024-01609-5","DOIUrl":"10.1007/s13538-024-01609-5","url":null,"abstract":"<div>Considering ceramic engineering advances, this study explores ZnMoO4-TiO2 electronic composite synthesis. This is synthesized using a solid-state mixed oxide reaction technique. Sample is calcined at 780 °C and sintered at 810 °C. The X-ray diffraction pattern of the sample structure matches with the JCPDS reference codes 98–000-4862 and 98–002-2025. Ambient temperature SEM and EDAX reveal the material’s structure and composition. Compound microstructure exhibits continuous grain dispersion and unique porosity. Dielectric, loss tangent, and conductivity were comprehensively analyzed from 30 to 450 °C and 1 kilohertz (kHz) to 1 megahertz (MHz). At temperatures above 300 °C, the dielectric constant increases. The activation energy for electrical conductivity exhibits a range of values, specifically from 0.82 to 1.92 eV at various frequencies, when the temperature increases from 400 to 450 °C. UV–visible spectroscopy determined the band gap energy of 3.12 eV, with absorption peaks at 205 and 390 nm. Based on these findings, ZnMoO4-TiO2 may be suitable for humidity sensors and other electrical and electronic devices.</div>","PeriodicalId":499,"journal":{"name":"Brazilian Journal of Physics","volume":"54 6","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142193802","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

Biomedical and Anticancer Potential of Green Synthesized Chalcogenide Zinc Sulfide Nanoparticles Using Different Plant Extracts as the Capping Agent 以不同植物提取物为封端剂的绿色合成硫化锌纳米粒子的生物医学和抗癌潜力

IF 1.5 4区物理与天体物理

Brazilian Journal of Physics Pub Date : 2024-09-13 DOI: 10.1007/s13538-024-01591-y

Arya Surendran, R. Tintu, Krishna S. Das, V. J Anjana Nair, Printy Varghese

{"title":"Biomedical and Anticancer Potential of Green Synthesized Chalcogenide Zinc Sulfide Nanoparticles Using Different Plant Extracts as the Capping Agent","authors":"Arya Surendran, R. Tintu, Krishna S. Das, V. J Anjana Nair, Printy Varghese","doi":"10.1007/s13538-024-01591-y","DOIUrl":"10.1007/s13538-024-01591-y","url":null,"abstract":"<div>Chalcogenide zinc sulfide nanoparticles have been synthesized through a simple green co-precipitation method using Phyllanthus emblica, Musa paradisiaca, and Curcumin Longa extract as the capping agent. The structural and optical properties of the prepared samples were studied using X-ray diffraction (XRD), scanning electron microscopy with energy dispersive X-ray analysis (SEM–EDX), transmission electron microscopy (TEM), Fourier transform infrared (FTIR) spectrum, UV–visible spectrum, and photoluminescence (PL) analysis. The XRD analysis confirms the cubic and crystalline nature of the synthesized samples. The crystallite size of the synthesized ZnS nanoparticles varies from 2.94 to 3.28 nm by changing the capping agent. Energy band gap of all the samples determined using Tauc plot method shows a tunability (ΔEg = 0.44 eV) in accordance to its particle size. Photoluminescence analysis of the sample at 370 nm excitation reveals the potential of the samples in visible emission with 8.6 watts/nm suitable for bioimaging probes. Anticancer activity and IC50 values of the prepared nanoparticles were studied using in vitro cytotoxicity (Tryphan blue exclusion), and the samples show anticancer activity against DLA (Dalton’s lymphoma ascites) bearing mice cell lines. The studies confirm that chalcogenide ZnS nanoparticles biofueled using Phyllanthus emblica extract shows maximum anticancer activity compared to the other two samples with 273 μg/ml IC50 (half maximal inhibitory concentration). This promising anticancer activity and visible emissions demonstrated by the green chalcogenide ZnS sample suggests its potential utilization as an effective agent in biomedical applications for combating cancer, biological labeling and in bioimaging applications.</div>","PeriodicalId":499,"journal":{"name":"Brazilian Journal of Physics","volume":"54 6","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142193803","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

Phase-Space Evolution of Squeezing-Enhanced Light and Its Attenuation 挤压增强光的相空间演变及其衰减

IF 1.5 4区物理与天体物理

Brazilian Journal of Physics Pub Date : 2024-09-12 DOI: 10.1007/s13538-024-01587-8

Ke Zhang, Lan-Lan Li, Hong-Yi Fan

{"title":"Phase-Space Evolution of Squeezing-Enhanced Light and Its Attenuation","authors":"Ke Zhang, Lan-Lan Li, Hong-Yi Fan","doi":"10.1007/s13538-024-01587-8","DOIUrl":"10.1007/s13538-024-01587-8","url":null,"abstract":"<div>As physicists continue to find approaches to achieve quantum squeezing enhancement, a key challenge is to identify the specific parameters of the squeezing operator and their boundary conditions. This paper employs the method of integration within an ordered product of operator (IWOP) in quantum mechanics to solve this problem for two independent parameters. First, the (q - p) phase space correspondence for enhanced squeezing is investigated, where (q,p) represent the coordinate and momentum, respectively. Then, the squeezing-enhanced state is theoretically obtained by finding the generalized squeezing operator (Sleft( {lambda ,r} right) = exp left( { - frac{v}{{2{u^* }}}{a^{dag 2}}} right)exp [left( {{a^dag }a + frac{1}{2}} right)ln frac{1}{{u^* }}]exp left( {frac{{v^* }}{{2{u^* }}}{a^2}} right)). It is demonstrated that the characteristic of the phase space transformation is (p to pcosh lambda - qsinh lambda {e^r},) (q to qcosh lambda - p{e^{ - r}}sinh lambda ,) (u = cosh lambda - isinh lambda sinh r). Here, (lambda ,r) are two independent parameters, and they must satisfy (tanh lambda left( {{{cosh }^2}r - 1} right) < cosh r - 1) to achieve enhanced squeezing of the quadrature operator. Further, the integral solution of the dissipation master equation is adopted to analyze the attenuation of this type of squeezed field. Meanwhile, the paper presents the canonical decomposition of the enhanced squeezing operator (Sleft( {lambda ,r} right)). Our research provides physicists with more refined insights to enhance the squeezing effect with more precision.</div>","PeriodicalId":499,"journal":{"name":"Brazilian Journal of Physics","volume":"54 6","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142193800","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

Low-Frequency Electrostatic Oscillations in Non-uniform Electron–Positron, Electron–Positron-Ion, and Electron–Ion Plasmas in the Presence of Ponderomotive Force 存在动力的非均匀电子-正电子、电子-正电子-离子和电子-离子等离子体中的低频静电振荡

IF 1.5 4区物理与天体物理

Brazilian Journal of Physics Pub Date : 2024-09-12 DOI: 10.1007/s13538-024-01590-z

M. Asgharzadeh, H. Zahed

{"title":"Low-Frequency Electrostatic Oscillations in Non-uniform Electron–Positron, Electron–Positron-Ion, and Electron–Ion Plasmas in the Presence of Ponderomotive Force","authors":"M. Asgharzadeh, H. Zahed","doi":"10.1007/s13538-024-01590-z","DOIUrl":"10.1007/s13538-024-01590-z","url":null,"abstract":"<div>Low-frequency electrostatic oscillations in three electron–positron, electron–positron-ion, and electron–ion quantum non-uniform magnetoplasmas in the presence of the ponderomotive force of the short pulse laser have been investigated in a comparative mode. According to the investigations, the oscillations in the direction parallel to the external magnetic field, where the plasmas are uniform in this direction, behave in the same way to a great extent in the three plasmas. In this direction, the oscillations are mostly influenced by the ponderomotive force of the laser, and in the absence of this force, they propagate stably with a constant phase and group velocities. In the presence of this force, the oscillations become unstable, and by the increase of this force, the instability rate and also the group and phase velocities of the oscillations increase. In the perpendicular direction, the oscillations indicate different behaviors in each of the three plasmas, and they are strongly affected by the number density, external magnetic field, and their transverse gradients. In this direction, the transverse gradient of the external magnetic field is the necessary condition for propagation of plasma waves in the electron–positron plasma, and also in the electron–ion plasma when the amount of ion charge is equal to the electron charge. However, in the electron–positron-ion plasma, due to the lack of charge symmetry, this condition is not necessary for perpendicular propagation.</div>","PeriodicalId":499,"journal":{"name":"Brazilian Journal of Physics","volume":"54 6","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142193801","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

Redshift as a Stretching Factor in Rotating Graphene Wormholes 旋转石墨烯虫洞中的拉伸因子 Redshit

IF 1.5 4区物理与天体物理

Brazilian Journal of Physics Pub Date : 2024-09-10 DOI: 10.1007/s13538-024-01600-0

Everton Cavalcante, Claudio Furtado

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Effect of Transition Metal (Gd, Dy) Co-doping on Structural, Optical, and Magnetic Properties of CeO2 Nanoparticles by Solid-State Reaction 通过固态反应掺杂过渡金属（Gd、Dy）对 CeO2 纳米粒子结构、光学和磁学特性的影响

IF 1.5 4区物理与天体物理

Brazilian Journal of Physics Pub Date : 2024-09-09 DOI: 10.1007/s13538-024-01602-y

G. Chinna Venkata Subbaiah, Nasina Madhusudhana Rao, Maddikera Kalyan Chakravarthi

引用次数: 0

Study of Multi-solitons, Breather Soliton Structures with (r, q) Distributed Ions and Electrons 带有 (r, q) 分布离子和电子的多孤子、呼吸孤子结构研究

IF 1.5 4区物理与天体物理

Brazilian Journal of Physics Pub Date : 2024-09-09 DOI: 10.1007/s13538-024-01599-4

Uday Narayan Ghosh, Alireza Abdikian, Prasanta Chatterjee

引用次数: 0

Interactions Between Charges in a Planar Model in the Presence of Nonminimal Lorentz Violation 存在非最小洛伦兹违反的平面模型中电荷之间的相互作用

IF 1.5 4区物理与天体物理

Brazilian Journal of Physics Pub Date : 2024-09-09 DOI: 10.1007/s13538-024-01598-5

C. B. Rocha, L. H. C. Borges, A. F. Ferrari

引用次数: 0