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For Selected: Download Citations EndNote Ris BibTeX Toggle Thumbnails Select Entanglement Dynamics of Three-Level Atoms with Light Fields QING Jiayang, WU Yunwen Journal of Jishou University(Natural Sciences Edition)    2023, 44 (6): 44-49.   DOI: 10.13438/j.cnki.jdzk.2023.06.008 Abstract （87）      PDF（pc） （870KB）（122）       Knowledge map    Save The system of three-level atom interacting with light field is studied by using the method of full quantum theory.Based on wave function,the dynamic evolution characteristics of different quantum states with the same coupling intensity are studied.In addition,the influence of different coupling intensity of the same quantum state on the dynamic evolution characteristics of the system is discussed.The results show that under the same coupling intensity,the population values of atoms in |b1> states first decrease and then increase with time,the population values of atoms in |b2> states and |b3> states first increase and then decrease with time,and the corresponding population values of |b2> states produce three peaks in the same period.The population values corresponding to the |b3> states produce two peaks in the same period,and there is also a trough after the first peak,and the population values of different quantum states show periodic oscillations with time.In the same quantum state,with the increase of the coupling coefficient,the dynamic evolution oscillation characteristics of the quantum state between the light field and atoms are enhanced,and the system dynamic evolution pattern always maintains periodic changes with the increase of time. Reference | Related Articles | Metrics | Comments（0） Select Spontaneous Radiation Dynamics of Three-Level Atoms Near Silver Nanospheres LI Yun, GAO Guangbo, SHAN Xinyu, HUANG Yonggang Journal of Jishou University(Natural Sciences Edition)    2023, 44 (6): 50-58.   DOI: 10.13438/j.cnki.jdzk.2023.06.009 Abstract （92）      PDF（pc） （2238KB）（137）       Knowledge map    Save Based on the method of Green's function presolvation operator,the spontaneous radiation dynamics of V-type three-level atoms near silver nanospheres are studied.The effects of atomic transition frequency and atomic distance on the surface of the nanosphere on the spontaneous radiation dynamics are investigated systematically.The results show that when the transition frequency of the atom is far away from the resonant frequency of the isoplasmon,the evolution spectrum of the atom is half high and narrow,the dynamic oscillation is enhanced,and the decay rate is slow with time.When the two transition frequencies are close to the formant frequency,the kinetic oscillation of the atom is weakened,and the attenuation rate is faster with time.The distance between the atom and the surface of the nanosphere plays an important role in the coherent oscillation.The closer the distance,the stronger the coherent oscillation;and the farther the distance,the weaker the coherent oscillation. Reference | Related Articles | Metrics | Comments（0） Select Resonant Casimir-Polder Force Properties of Atoms in the Vicinity of a Convex Structure GAO Guangbo, SHAN Xinyu, ZHAO Jinyun, HUANG Yonggang Journal of Jishou University(Natural Sciences Edition)    2023, 44 (6): 59-66.   DOI: 10.13438/j.cnki.jdzk.2023.06.010 Abstract （76）      PDF（pc） （1353KB）（122）       Knowledge map    Save The influence of the transition frequency and position of a two-level atom in the vicinity the convex structure on the resonant casimir-polder force is studied by using COMSOL Multiphysics software.The results show that compared with the cross-sectional silver nanospheres,the convex structure produces a new surface plasmon resonance mode,which greatly enhances the resonance casimir-polder force on the atom.In addition,when the atom is close to the surface of the convex structure,the new resonance mode plays a leading role in the regulation of the resonant casimir-polder force,and the contribution of the new resonant mode to the resonant casimir-polder force decreases sharply with the increase of the distance.and the contribution of the resonance mode produced by the bulge is faster than that produced by the cross-section silver nanospheres. Reference | Related Articles | Metrics | Comments（0） Select Spontaneous Emission of Atoms in Double-Column Structure Based on Quasi-Normal Mode Theory CHEN Xuanren, SHAN Xinyu, YANG Hong Journal of Jishou University(Natural Sciences Edition)    2023, 44 (6): 67-74.   DOI: 10.13438/j.cnki.jdzk.2023.06.011 Abstract （101）      PDF（pc） （1458KB）（135）       Knowledge map    Save Based on the quasi-normal mode (QNM) theory,in the local photoresponse model,fluid dynamics model and generalized non-local photoresponse model of free electrons in metals,the spontaneous emission enhancement characteristics of two-level atoms in the nano-column structure are studied.With efficient coupled QNM theory,the effects of quantum dot position and double-column gap distance on the enhancement properties of spontaneous emission are investigated.The results show that compared with the full-wave method,the quasi-canonical mode method can efficiently and accurately calculate the enhanced characteristics of spontaneous emission,and the nanopillar gap has an important influence on the resonance frequency of the quasi-canonical mode.These studies have important guiding significance for understanding the nanoscale dimer structure to enhance light-matter interaction. Reference | Related Articles | Metrics | Comments（0） Select Energy Functional of Orbital-Free Density Functional Theory for Sodium Metal Slab LIU Runfeng, HU Qihong, ZHOU Fang, CHENG Xiaodi, WANG Xiaoyun, HUANG Yonggang Journal of Jishou University(Natural Sciences Edition)    2023, 44 (6): 90-96.   DOI: 10.13438/j.cnki.jdzk.2023.06.014 Abstract （83）      PDF（pc） （713KB）（123）       Knowledge map    Save The method of using OF-DFT to study the ground-state density and work function of metal sodium plates was explored.Through extensive numerical experiments,it was determined that a vW kinetic energy functional weight of 0.4 is required to obtain accurate ground-state properties for metal sodium plates,and this kinetic energy functional weight is applicable to different exchange-correlation potentials. Reference | Related Articles | Metrics | Comments（0）