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Analysis of asymmetry of the D_(α)emission spectra under the zeeman effect in boundary region for D-D experiment on EAST tokamak

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Chinese Physics B 2021年第2期30卷 377-384页

作者： Wei Gao Juan Huang Jianxun Su Jing Fu Yingjie Chen Wei Gao Zhenwei Wu EAST Team Institute of Plasma Physics Chinese Academy of SciencesHefei 230031China

In 2015 campaign,deuterium atomic emission spectra(D_(α))under the zeeman effect in boundary region had been measured by a high resolution optical spectroscopic multichannel analysis(OSMA)system based on passive spectroscopy during the deuterium plasma discharge on EAST tokamak,and part of the works about the zeeman effect on D_(α)spectra had already been ***,the asymmetric phenomena of D_(α)emission spectra under the zeeman effect were observed in process of analyzing the spectral *** understand the asymmetric phenomena and acquire the useful local plasma information,an algorithm was proposed and used to analyze the asymmetry of the emission spectra under the zeeman effect with all polarization components(πand±σ).In the algorithm,the neutral atoms were considered to follow the Maxwell distribution on EAST,and I+σ=I-σwas considered and *** of the line-averaged spectra along the viewing chord,the emission spectra were considered from two different regions:low-field side(LFS)and high-field side(HFS).Each spectral line was classified into three energy categories(the cold,warm,and hot)based on different atomic production processes in boundary *** viewing angleθ(between the magnetic field B and the viewing chord),magnetic field B at two spectral emission positions(HFS and LFS)and the Doppler shift of all three energy categories of each spectral line were all considered in the *** effect of instrument function was also included *** information of the boundary plasma were acquired,the reason for the asymmetric phenomena was discussed,and the boundary recycling during the discharge were studied in the *** on fitting a statistical data of acquired fitting results,an important conclusion was acquired that the ratio of the spectral line intensity in HFS and LFS was proportional to the square of that of the corresponding magnetic field.

关键词： zeeman effect deuterium atom spectral lineshape plasma

Dynamic and steady control of quantum coherence in photonic crystals via the zeeman effect

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Science China(Physics,Mechanics & Astronomy) 2012年第12期55卷 2300-2304页

作者： CHEN LuZhou HUANG YongGang JIN ChongJun WANG XueHua State Key Laboratory of Optoelectronic Materials and Technologies School of Physics and EngineeringSun Yat-Sen UniversityGuang zhou 510275China

The dynamic evolution of a multi-level atom in the three-dimensional photonic crystal under an applied magnetic field is *** combining the zeeman effect with the photonic band gap effect,the dynamic quantum superposition states and steady quantum coherent trapping states of the atom can be flexibly *** paves the way for coherent manipulation of quantum states in the solid-state system,which has important applications in quantum information processing.

关键词： quantum superposition state control of quantum coherence photonic crystal gap zeeman effect

zeeman effects on Josephson current in d-wave superconductor/d-wave superconductor junctions

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Chinese Physics B 2008年第5期17卷 1893-1901页

作者：廖艳华董正超尹在峰付浩 Department of Physics Huaiyin Teachers College and Jiangsu Province Key Laboratory for Chemistry of Low-Dimensional Materials Department of Physics College of Science Yanbian University

This paper solves a self-consistent equation for the d-wave superconducting gap and the effective exchange field in the mean-field approximation, and studies the zeeman effects on the d-wave superconducting gap and thermodynamic potential. The Josephson currents in the d-wave superconductor（S）/insulating layer（I）/d-wave S junctions are calculated as a function of the temperature, exchange field, and insulating barrier strength under a zeeman magnetic field on the two d-wave Ss. It is found that the Josephson critical currents in d-wave S/d-wave S junction to a great extent depend on the relative orientation of the effective exchange field of the two S electrodes, and the crystal orientation of the d-wave S. The exchange field under certain conditions can enhance the Josephson critical current in a d-wave S/I/d-wave S junction.

关键词： zeeman effect d-wave S/d-wave S ferromagnetic d-wave superconductor Josephson current

Residual Doppler effect on Electromagnetically Induced Transparency in a zeeman Sublevel System

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Chinese Physics Letters 2010年第5期27卷 138-141页

作者：胡振燕李路明陈佩荣孙欣 School of Electronics and Computer Science Peking University Beijing 100871 Department of Communication Jiangxi Electric Power Information and Communication Company Nanchang 330029

We investigate the residual Doppler effect on the linewidth of electromagnetieally induced transparency （EIT） in a zeeman sublevel system where a careful experimental design ensures the smallest measurement error. The overall measurement error of the EIT linewidth is estimated to be less than 5%. We present the linear dependence of EIT resonance broadening at small angular deviation in detail. The theoretical analysis exploits the dependence of this feature and shows the qualitative agreement between numerical results and experimental results.

关键词： DOPPLER effect ELECTROMAGNETIC induction TRANSPARENCY (Optics) zeeman effect EXPERIMENTAL design MEASUREMENT errors QUALITATIVE research NUMERICAL analysis

zeeman effects on the coherent tunnelling conductance in normal-metal／superconductor／normal-metal double tunnel junctions

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Chinese Physics B 2005年第6期14卷 1209-1216页

作者：董正超 DepartmentofPhysics HuaiyinTeachersCollegeHuaian223001China//JiangsuProvinceKeyLaboratoryforChemistryofLow-DimensionalMaterialsHuaian223001China

The coherent quantum transport is investigated in normal-metal/superconductor/normal-metal (N/S/N) double tunnel junctions under a zeeman magnetic field on the S. Taking simultaneously into account the electron-injected current from one N electrode and the hole-injected current from the other N electrode, we derive a general formula for the differential conductance in the N/S/N system. It is shown that the conductance spectrum exhibits oscillatory behaviour with the bias voltage, and the oscillation amplitude is reduced with increasing temperature and zeeman magnetic field, the zeeman energy can lead to the zeeman splitting of conductance peaks. In the tunnel limit, a series of bound states of quasiparticles will form in the S.

关键词： zeeman effect coherent effect normal-metal/superconductor/normal-metal tunnel junctions

Formation of high-density cold molecules via electromagnetic trap

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Chinese Physics B 2022年第10期31卷 371-376页

作者： Ya-Bing Ji Bin Wei Heng-Jiao Guo Qing Liu Tao Yang Shun-Yong Hou Jian-Ping Yin State Key Laboratory of Precision Spectroscopy East China Normal UniversityShanghai 200241China Key Laboratory of Nondestructive Test(Ministry of Education) Nanchang Hangkong UniversityNanchang 330063China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China

Preparation and control of cold molecules are advancing rapidly, motivated by many exciting applications ranging from tests of fundamental physics to quantum information processing. Here, we propose a trapping scheme to create high-density cold molecular samples by using a combination of electric and magnetic fields. In our theoretical analysis and numerical calculations, a typical alkaline-earth monofluoride, MgF, is used to test the feasibility of our proposal.A cold MgF molecular beam is first produced via an electrostatic Stark decelerator and then loaded into the proposed electromagnetic trap, which is composed of an anti-Helmholtz coil, an octupole, and two disk electrodes. Following that,a huge magnetic force is applied to the molecular sample at an appropriate time, which enables further compressing of the spatial distribution of the cold sample. Molecular samples with both higher number density and smaller volume are quite suitable for the laser confinement and other molecular experiments such as cold collisions in the next step.

关键词： Stark effect zeeman effect cold molecules

Theoretical calculations of hyperfine splitting,zeeman shifts,and isotope shifts of^(27)Al^(+)and logical ions in Al^(+)clocks

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Chinese Physics B 2021年第12期30卷 361-369页

作者： Xiao-Kang Tang Xiang Zhang Yong Shen Hong-Xin Zou College of Liberal Arts and Sciences National University of Defense TechnologyChangsha 410073China

Based on the multiconfiguration Dirac-Hartree-Fock(MCDHF)method,similar models are employed to simultaneously calculate the first-order and second-order zeeman coefficients as well as the hyperfine interaction constants of the related energy levels of ^(27)Al^(+)and its logical ions ^(9)Be^(+)and^(25)Mg^(+)in the^(27)Al^(+)optical *** less than 0.34%deviations from experimental values in zeeman coefficients of^(27)Al^(+),these calculated parameters will be of great help for better evaluation of the systematic *** also calculate the isotope shift parameters of the related energy levels,which could extend our knowledge and understanding of nuclear properties of these ions.

关键词： zeeman effect isotope shift aluminum ion optical clock MCDHF method

On the Complementarity of Absorption and MCD Spectroscopy

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Journal of Rare Earths 1998年第3期16卷 45-51页

作者： Binnemans, K. Gorller-Walrand, C Univ of Leaven Heverlee Belgium

The use of magnetic circular dichroism(MCD) spectroscopy for probing the 4f n configuration of trivalent lanthanide ions is explored. The technique is compared with optical absorption spectroscopy. MCD is valuable for the detection of degenerate crystal field levels in uniaxial crystals and for observing transitions not resolved in the absorption sepctrum, for the study of the site symmetry and for checking the reliability of crystal field and intensity parameters. On the other hand, selection of the samples has to be done more carefully than for absorption spectroscopy, because an MCD spectrum can only be recorded in an isotropic direction.

关键词： Rare earths Lanthanides Magnetic circular dichroism zeeman effect Optical absorption

An Exotic Type of Fulde-Ferrel-Larkin-Ovchinnikov States in Spin-Orbit Coupled Condensates

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Chinese Physics Letters 2014年第5期31卷 161-164页

作者：韩强刘佳张旦波汪子丹 Department of Physics Renmin University of China Beijing 100872 Department of Physics and Center of Theoretical and Computational Physics The University of Hong Kong Pokfulam Road Hong Kong Beijing Key Laboratory of Opto-electronie Functional Materials and Micro-nano Devices Renmin University of China Beijing 100872

We find for the first time that a model Hamiltonian or s-wave superconductors in tne presence or spm-orbit interactions and a zeeman field is exactly solvable. Most intriguingly, based on the exact solutions, a novel type of Fulde Ferrel-Larkin-Ovchinnikov ground state is rigorously revealed, in which the center-of-mass momentum of the fermion pair is proportional to the zeeman field. We also generalize our exact analysis to the spin-orbit- coupled Bose-Einstein condensate.

关键词： SPIN-orbit coupling constants HAMILTONIAN systems SUPERCONDUCTORS RESEARCH zeeman effect CENTER of mass BOSE-Einstein condensation