检索结果-内蒙古大学图书馆

Study of scalar particles through the Klein–Gordon equation under rainbow gravity effects in Bonnor–Melvin-Lambda space-time

引用

Communications in Theoretical physics 2024年第4期76卷 113-125页

作者： Faizuddin Ahmed Abdelmalek Bouzenada Department of Physics University of Science&Technology MeghalayaRi-Bhoi793101India Laboratory of theoretical and applied Physics Echahid Cheikh Larbi Tebessi UniversityAlgeria

In our investigation,we explore the quantum dynamics of charge-free scalar particles through the Klein–Gordon equation within the framework of rainbow gravity,considering the Bonnor–Melvin-Lambda(BML)space-time *** BML solution is characterized by the magnetic field strength along the axis of the symmetry direction which is related to the cosmological constantΛand the topological parameterαof the *** behavior of charge-free scalar particles described by the Klein–Gordon equation is investigated,utilizing two sets of rainbow functions:(i)f(χ)=■,h(χ)=1 and(ii)f(χ)=1,h(χ)=1+βХ/*** 0<(Х=■)≤1 with E representing the particle's energy,Ep is the Planck's energy,andβis the rainbow *** obtain the approximate analytical solutions for the scalar particles and conduct a thorough analysis of the obtained ***,we study the quantum dynamics of quantum oscillator fields within this BML space-time,employing the Klein–Gordon *** also,we choose the same sets of rainbow functions and obtain the approximate eigenvalue solution for the oscillator ***,we demonstrate that the relativistic approximate energy profiles of charge-free scalar particles and oscillator fields get influenced by the topology of the geometry and the cosmological ***,we show that the energy profiles of scalar particles receive modifications from the rainbow parameter and the quantum oscillator fields by both the rainbow parameter and the frequency of oscillation.

关键词： quantum fields in curved space-time relativistic wave equations solutions of wave equations bound-state special functions

来源：评论

学校读者我要写书评

暂无评论

Progress and prospects of pH-neutral aqueous organic redox flow batteries:Electrolytes and membranes

引用

Journal of Energy Chemistry 2024年第9期96卷 89-109页

作者： Kang Peng Gonggen Tang Chao Zhang Xian Yang Peipei Zuo Zhanfeng Xiang Zhong Yao Zhengjin Yang Tongwen Xu Key Laboratory of Precision and Intelligent Chemistry Department of Applied ChemistrySchool of Chemistry and Materials ScienceUniversity of Science and Technology of ChinaHefei 230026AnhuiChina Suqian Time Energy Storage Technology Co. Ltd.Suqian 223800JiangsuChina

Aqueous organic redox flow batteries(AORFBs),which exploit the reversible electrochemical reactions of water-soluble organic electrolytes to store electricity,have emerged as an efficient electrochemical energy storage technology for the grid-scale integration of renewable ***-neutral AORFBs that feature high safety,low corrosivity,and environmental benignity are particularly promising,and their battery performance is significantly impacted by redox-active molecules and ion-exchange membranes(IEMs).Here,representative anolytes and catholytes engineered for use in pH-neutral AORFBs are outlined and summarized,as well as their side reactions that cause irreversible battery capacity *** addition,the recent achievements of IEMs for pH-neutral AORFBs are discussed,with a focus on the construction and tuning of ion transport ***,the critical challenges and potential research opportunities for developing practically relevant pH-neutral AORFBs are presented.

关键词： Aqueous organic redox flow battery pH-Neutral Anolyte Catholyte Membrane

来源：评论

学校读者我要写书评

暂无评论

Martensitic transformation and magnetic properties in Mn_(49-x)Cu_(x)Ni_(41)Sn_(10)(x=0-2)

引用

Rare Metals 2023年第7期42卷 2433-2438页

作者： Meng-Zhe Zhao Hong-Mei Qiu Ze-Ya Zhu Yun-Li Xu Zhu-Hong Liu Li-Qing Pan Department of Applied Physics University of Science and Technology BeijingBeijing100083China College of Science China Three Gorges UniversityYichang443002China

The crystal structure,phase transition,metamagnetic behavior and magnetic entropy change(ΔS_(M))of the Mn_(49-x)Cu_(x)Ni_(41)Sn_(10)(x=0-2)alloys were systematically *** results of experiment about crystal structure confirm that Mr_(49-x)Cu_(x)Ni_(41)Sn_(10)alloys have a highly ordered cubic L2_(1)Heusler *** Cu element improving,all samples have a martensitic transformation and inverse martensitic transformation by analyzing the result of magnetic *** saturation magnetization of samples decreases gradually,the martensitic transformation temperature(T_(M))of as-annealed samples increases to a high-temperature area,and the Curie temperature(T_(C))of samples moves to a low-temperature area with the content of Cu element increasing from x=0 to x=*** positive values of magnetic entropy change(ΔS_(M))of all alloys were investigated near the martensitic *** the applied magnetic field is 3 T,a worthwhile value ofΔS_(M)can reach up to 32.0 J·kg^(-1)·K^(-1)in Mn_(47)Cu_(2)Ni_(41)Sn_(10)alloy.

关键词： Heusler alloys Arc melting X-ray diffraction Magnetic properties

来源：评论

学校读者我要写书评

暂无评论

Quantum flutter from the nonlinear Luttinger liquid perspective

引用

Communications in Theoretical physics 2025年第5期77卷 155-160页

作者： Sheng Wang Zhehao Zhang Xi-Wen Guan Innovation Academy for Precision Measurement Science and Technology Chinese Academy of Sciences University of Chinese Academy of Sciences Department of Physics and Hong Kong Institute of Quantum Science and Technology The University of Hong Kong NSFC-SPTP Peng Huanwu Center for Fundamental Theory Hefei National Laboratory Department of Fundamental and Theoretical Physics Research School of Physics Australian National University

Quantum flutter is a ubiquitous phenomenon which can be observed from the fast moving impurity injected into a fermionic or bosonic medium of quantum liquid. In this scenario, one usually considers a medium of a fully polarized state and injects a spin-flipped impurity as the initial state. When the initial velocity of the impurity is beyond the intrinsic sound velocity of the medium, the impurity momentum dramatically exhibits a long-lived periodic oscillation with the periodicity remaining invariant with respect to the initial velocity. In this paper, we show that such a novel phenomenon can be explained by a linear Luttinger liquid coupled to a deep hole in the Fermi sea. Once the deep hole excitations are involved and the impurity momentum surpasses the Fermi momentum, the propagator thus displays a periodic oscillation after a quick relaxation decay. The oscillation periodicity is solely determined by the energy of the deepest hole excitation. Our result provides deep insights into the dynamical behavior of quantum impurities immersed into one-dimensional quantum liquids.

关键词： Luttinger liquid nonlinear Luttinger liquid quantum flutter Yang-Gaudin model

来源：评论

学校读者我要写书评

暂无评论

A Numerical Method for Solving the Time Dependent Hartree-Fock Equations of the Helium Atom

引用

Defect and Diffusion Forum 2024年 436卷 139-145页

作者： Naranchimeg, D. Sukh, O. Munkhsaikhan, G. Tsogbadrakh, N. Department of Physics School of Applied Sciences Mongolian University of Science and Technology Ulaanbaatar Mongolia Department of Physics School of Arts and Sciences National University of Mongolia Ulaanbaatar Mongolia

This paper presents an efficient and accurate method for solving the time-dependent Hartree-Fock equations for the helium atom in the ground and single excited states. The radial coordinate is discretized by the discrete variable representation (DVR), which is constructed from Coulomb wave functions. To solve the equation, the spectral method with Coloumb wave functions is used as a basis. We illustrate that the calculated electronic energies for the helium atom are in good agreement with the best available experimental values. The CWDVR method proves to be more economical and efficient as it uses the optimal few numbers of grid points compared to other numerical calculations. © 2024 Trans Tech Publications Ltd, All Rights Reserved.

关键词： Wave functions

来源：评论

学校读者我要写书评

暂无评论

Strong-field photoelectron holography in the subcycle limit

引用

Light(science & Applications) 2024年第6期13卷 1032-1040页

作者： Tsendsuren Khurelbaatar Jaewuk Heo ShaoGang Yu XuanYang Lai XiaoJun Liu Dong Eon Kim Center for Attosecond Science and Technology Department of PhysicsPohang University of Science and TechnologyPohangGyeongbuk37673Korea Max Planck POSTECH/KOREA Research Initiative PohangGyeongbuk37673Korea State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan Institute of Physics and MathematicsInnovation Academy for Precision Measurement Science and TechnologyChinese Academy of Sciences430071WuhanChina Wuhan Institute of Quantum Technology 430206WuhanChina

Strong-field photoelectron holography is promising for the study of electron dynamics and structure in atoms and molecules,with superior spatiotemporal resolution compared to conventional electron and X-ray ***,the application of strong-field photoelectron holography has been hindered by inter-cycle interference from multicycle ***,we address this challenge by employing a near-single-cycle field to suppress the inter-cycle *** observed and separated two distinct holographic patterns for the first *** measurements allow us not only to identify the Gouy phase effect on electron wavepackets and holographic patterns but also to correctly extract the internuclear separation of the target molecule from the holographic *** work leads to a leap jump from theory to application in the field of strong-field photoelectron holography-based ultrafast imaging of molecular structures.

关键词： photoelectron holographic cycle

来源：评论

学校读者我要写书评

暂无评论

NGC 4117:A New Compton-thick AGN Revealed by Broadband X-Ray Spectral Analysis

引用

Research in Astronomy and Astrophysics 2023年第5期23卷 19-26页

作者： Pavithra Mohanadas Adlyka Annuar Department of Applied Physics Faculty of Science and TechnologyUniversiti Kebangsaan Malaysia43600 UKM BangiSelangorMalaysia

In this paper,we present the broadband(0.5–195 keV)X-ray spectral analysis for one of the newly detected AGNs in the Swift-BAT 105 month Hard X-ray Survey Catalog,NGC *** to our ongoing research on low luminosity AGNs from the Swift-BAT 105 month catalog,we examine whether they are indeed low luminosity or heavily obscured *** of the AGNs in our sample is NGC 4117,where we discover it could be potentially a *** to examine NGC 4117 in detail,we combined the high energy Swift-BAT data with low energy data from XMM-Newton and Swift-XRT,and fitted the spectra simultaneously using physically-motivated models.A high absorption occurred at lower energies,i.e.,below 3 *** studies suggested that NGC 4117was heavily obscured with a large column density(~10^(23)cm^(-2)).Our fitting suggests that this AGN is in the Compton-thick regime with a predicted line-of-sight column density(N_(H,los))of 3.82×1024cm^(-2)and a torus column density(N_(H,tor))of 3.07×10^(24)cm^(-2).Both models yield intrinsic luminosity of 1.03×10^(42)erg s^(-1)at 2–10 keV while our bolometric luminosity is 2.05×10^(43)erg s^(-1),indicating that NGC 4117 is not an intrinsically low luminosity ***,it is a standard *** value of Eddington ratio that we obtained is 0.22,suggesting a very high accretion rate for this AGN.

关键词： galaxies active-X-rays galaxies-techniques spectroscopic

来源：评论

学校读者我要写书评

暂无评论

Building and characterizing a stylus ion-trap system

引用

Chinese physics B 2024年第4期33卷 122-127页

作者：崔太豪魏雅琪李冀袁泉戴双晴李沛东周飞张建奇郑驻军陈亮冯芒 State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan Institute of Physics and MathematicsInnovation Academy of Precision Measurement Science and TechnologyChinese Academy of SciencesWuhan 430071China University of the Chinese Academy of Sciences Beijing 100049China Laboratory of Quantum Science and Engineering South China University of TechnologyGuangzhou 510641China Research Center for Quantum Precision Measurement Guangzhou Institute of Industry TechnologyGuangzhou 511458China Department of Physics Zhejiang Normal UniversityJinhua 321004China

Cold trapped ions can be excellent sensors for ultra-precision detection of physical quantities,which strongly depends on the measurement situation at *** stylus ion trap,formed by two concentric cylinders over a ground plane,holds the promise of relatively simple structure and larger solid angle for optical access and fluorescence collection in comparison with the conventional ion *** we report our fabrication and characterization of the first stylus ion trap constructed in China,aiming for studying quantum optics and sensing weak electric fields in the *** have observed the stable confinement of the ion in the trapping potential for more than two hours and measured the heating rate of the trap to be dε/dt=7.10±0.13 meV/s by the Doppler recooling *** work starts a way to building practical quantum sensors with high efficiency of optical collection and with ultimate goal for contributing to future quantum information technology.

关键词： stylus ion trap electric-field noises Doppler recooling method heating rate

来源：评论

学校读者我要写书评

暂无评论

Magnetic field annealing of FeCo-based amorphous alloys to enhance thermal stability and Curie temperature

引用

Rare Metals 2023年第6期42卷 2000-2006页

作者： Zai-Dao Li Wei-Wei Zhang Ge-Tian Li Song-Song Li Hong-Sheng Ding Tao Zhang Yu-Jun Song Center for Modern Physics Technology Department of Applied PhysicsBeijing Key Laboratory for Magneto-Photoelectrical Composite and Interface ScienceUniversity of Science and Technology BeijingBeijing100083China School of Materials Science and Engineering Beihang UniversityBeijing100191China

Annealing temperatures and applied magnetic fields are two important parameters for the performance modification of magnetic *** article investigated the effect of different annealing temperatures on crystallization condition,magnetic properties and thermal stability of the amorphous magnetic alloy Co_(36)Fe_(36)Si_(4.8)B1_(9.2)Nb_(4)(at%).Results indicate that the annealing temperature can significantly affect the size and content of precipitated nanocrystals in the amorphous alloy,and the precipitation of nanocrystalline phases can result in the distinct change of magnetic properties and Curie *** the annealing was performed at 595 ℃ for 30 min under an applied transverse external magnetic field of 9550.0A·m^(-1),the amorphous alloy shows excellent soft magnetic properties with the saturation magnetization of alloy reaching 110.00 mA·m^(2)·g^(-1),the residual magnetic induction intensity of 4 × 10^(-6) T and the coercivity as low as57.3 A·m^(-1).Furthermore,the Curie temperature of the field-annealed samples can reach up to 440 0C,approximately 58℃ higher than that of the as-quenched species.

关键词： Soft magnetic alloys Amorphous alloy Field annealing

来源：评论

学校读者我要写书评

暂无评论

Room-temperature ferrimagnetism and size-modulated electronic structures in two-dimensional cluster-based metal-organic frameworks

引用

science China Chemistry 2024年第4期67卷 1334-1340页

作者： Jing Cheng Xingxing Li Jinlong Yang Key Laboratory of Precision and Intelligent Chemistry University of Science and Technology of ChinaHefei 230026China Department of Chemical Physics University of Science and Technology of ChinaHefei 230026China Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of ChinaHefei 230026China Hefei National Laboratory University of Science and Technology of ChinaHefei 230088China

Cluster-assembled materials have attracted particular attention for their complex hierarchical structures and unique ***,the majority of cluster-based assemblies developed so far are either non-magnetic or only exhibit magnetic ordering with a relatively low Curie temperature,limiting their applications in ***,two-dimensional(2D)cluster-assembled materials with room-temperature magnetism remain highly *** this purpose,based on first principles calculations,we design a series of thermodynamically stable 2D cluster-based metal-organic frameworks(MOFs)Fe_(n)-(pyz)(n=1-6)by utilizing Fenmetal clusters as nodes and nitrogen-containing pyrazine ligands as organic *** 2D cluster-based MOFs exhibit robust ferrimagnetic ordering due to the strong d-p direct exchange interaction between d-electron spin of Fe_(n)(n=1-6)clusters and charge transfer-induced p-electron spin of pyrazine *** particular,the ferrimagnetic Curie temperatures are well above room temperature(up to 836 K).Additionally,altering the size of Fe_(n)clusters in Fe_(n)-(pyz)(n=1-6)MOFs results in diverse functional spintronic properties,including bipolar magnetic semiconductors,half semiconductors and Dirac half ***,these 2D assembled MOFs possess sizable magnetic anisotropy energies,up to 9.16 me V per formula.

关键词： metal-organic framework two-dimensional material half metal bipolar magnetic semiconductor magnet

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：