5-(对-β-乙酸乙酯基氨基苯基)-10,15,20-三苯基卟啉的合成

以5,10,15,20-四苯基卟啉为原料,经硝化,还原和取代反应合成了新化合物5-(对-β-乙酸乙酯基氨基苯基)-10,15,20-三苯基卟啉,其结构经UV,1H NMR,IR和元素分析表征。     

Self-assembled silver nanoparticles: correlation between structural and surface plasmon resonance properties

We report a facile method for controllable fabrication of high-density silver nanoparticle films with a widely adjustable surface plasmon resonance (SPR) frequency, based on the gas phase cluster beam deposition. On the one hand, we can control the particle size by depositing clusters on silica substrate. Light extinction spectra of the self-assembled Ag nanoparticles with various particle sizes are characterized and show two SPRs, in which a SPR exhibits a redshift from less 400 nm to more than 570 nm with an increase in the particle size, whereas the other shows a slight position shifting. On the other hand, the inter-particle distance of the self-assembled Ag nanoparticles can also be controlled by depositing clusters on silica glass coated with Formvar film, and the SPR wavelength shows a redshift from <400 nm to more than 560 nm, which can be attributed to the increase of the fraction of closely spaced nanoparticle pairs that are near-field coupled with the deposition mass. The size and coverage-dependent SPR properties are also compared with the results from the discrete dipole approximation calculations. The present method of tailoring metallic microstructures could find important applications in plasmonics.     

Additivity Relations of Quantum Correlations for Three-qubit Entangled State in Atom-cavity System

Taking advantage of quantum discord and negativity respectively, four additivity relations of quantum correlations are studied in the atom-cavity system, for three identical two-level atoms resonantly interact with a single-mode high-Q cavity simultaneously. Through numerical analysis, we find that in this model of atom-cavity system, four additivity relations of negativity are always satisfied well, no matter tripartite are in the pure states or the mixed states, while the results of quantum discord are not always satisfied. What’s more, if and only if the mixed three-atom states evolve into the pure states again, four additivity inequality relations of quantum discord and negativity become equalities simultaneously.     

线极化波对带电粒子的加速机制

讨论了线极化波对带电粒子三种加速机制:(1)介质折射率递减但外加磁场保持不变；(2)介质折射率不变但外加磁场递增；(3)介质折射率递减且外加磁场递增。结果显示，在一定的加速距离内，按照机制(3)利用LPEMW加速电子的效率最高。另外，机制(3)可以避免机制(2)中电子在加速过程中回飞的问题，这一点在利用线极化波(LPEMW)加速电子束或带电粒子束时非常重要。     

基于腔QED系统的几何量子失谐及其传送

研究了基于腔量子电动力学（腔QED）系统的几何量子失谐及其传送。该系统包括两个独立的子系统，每个子系统由两个二能级原子与单模腔共振相互作用。结果表明，所有初始存储在原子A1A2中的几何量子失谐最终被转移到原子B1B2和腔C1C2。同时，原子A1A2 ，B1B2和腔C1C2的几何量子失谐在该量子系统中可以发生猝死（DSD）以及纠缠突然死亡（ESD）。但是，在该量子系统中几何量子失谐不能完全由于原子的自发辐射和腔衰减而复活。此外，原子A1A2 ，B1B2和腔C1C2几何量子失谐的量，取决于其纯度p，并与其成比例，p的值越小，几何失谐越小。它也表明，在原子自发辐射和腔衰减的情况下，原子A1A2 ，B1B2和腔C1C2的几何量子失谐将经历振荡衰减并最终衰减到零。不过，在没有原子自发辐射和腔衰减的情况下，原子A1A2 ，B1B2和腔C1C2的几何量子失谐却没有衰减。     

On C-left Hyp erideals of Ordered Semihyp ergroups

In this paper, the concept of C-left hyperideals is introduced in ordered semihypergroups, and several related properties are investigated. In particular, we discuss the relationships between the greatest left hyperideals and C-left hyperideals of ordered semihypergroups. Furthermore, we introduce the concept of left bases of an ordered semihypergroup, and give out the sufficient and necessary conditions of the existence of the greatest C-left hyperideal of an ordered semihypergroup by the properties of left bases. The result about C-left ideals in ordered semigroups is generalized to the ordered semihypergroups.     

基于腔QED系统的几何量子失谐及其传送

研究了基于腔量子电动力学（腔QED）系统的几何量子失谐及其传送。该系统包括两个独立的子系统，每个子系统由两个二能级原子与单模腔共振相互作用。结果表明，所有初始存储在原子A1A2中的几何量子失谐最终被转移到原子B1B2和腔C1C2。同时，原子A1A2 ，B1B2和腔C1C2的几何量子失谐在该量子系统中可以发生猝死（DSD）以及纠缠突然死亡（ESD）。但是，在该量子系统中几何量子失谐不能完全由于原子的自发辐射和腔衰减而复活。此外，原子A1A2 ，B1B2和腔C1C2几何量子失谐的量，取决于其纯度p，并与其成比例，p的值越小，几何失谐越小。它也表明，在原子自发辐射和腔衰减的情况下，原子A1A2 ，B1B2和腔C1C2的几何量子失谐将经历振荡衰减并最终衰减到零。不过，在没有原子自发辐射和腔衰减的情况下，原子A1A2 ，B1B2和腔C1C2的几何量子失谐却没有衰减。     

Performance analysis of MAP/G/1 queue with working vacations and vacation interruption

We consider the MAP/G/1 queue with working vacations and vacation interruption. We obtain the queue length distribution with the method of supplementary variable, combined with the matrix-analytic method and censoring technique. We also obtain the system size distribution at pre-arrival epoch and the Laplace–Stieltjes transform (LST) of waiting time.     

Coherent manipulation and guiding of Bose–Einstein condensates by optical dipole potentials

The coherent manipulation of Bose–Einstein condensates by far blue detuned optical dipole potentials is discussed in two regimes. The local manipulation of the phase of the condensate wavefunction by temporally applied dipole potentials represents a powerful tool for the design of matter waves. We use this method in particular for the creation of dark solitons in Bose–Einstein condensates and study their dynamics. Spatially inhomogeneous dipole potentials like far blue detuned doughnut laser beams can be used for the creation of Bose–Einstein condensates within a waveguide structure.