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41.
42.
This paper focuses on measuring straightness of large-scale dimension by using laser diode fiber alignment, diffraction imaging technique and a CCD camera. In this method, we use a laser diode fiber alignment beam as the datum reference of straightness, deviation of the measured from this datum, can be detected by a CCD camera directly. Also a novel image processing algorithm is presented. The experiment result shows that the measurement range of L (m), the measurement accuracy of the system is 3+2.3×10-6L(\mm). 相似文献
43.
We have carried out a molecular dynamics stimulation for a few Paul-trapped ions exerted by a trapping force, inter-ion Coulomb forces and a damping force from a cooling source. The geometric structure in the ordered phase is studied in detail. It is found that the structure varies regularly with the ion number and forms concentric shells when the ion number grows. Furthermore, the similarity between the ions' structure and the potential of the trap is also presented. Finally, the case in the second stability region is investigated, which gives a comparison with that in the first stability region. 相似文献
44.
该文首先讨论在离子阱中,如何利用红、蓝失谐跃迁来构造量子计算所需的各种幺正矩阵。然后利用这些矩阵提出了一个实现两位量子搜寻的方案。 相似文献
45.
Energy Eigenstates of a Quantum Gate System 总被引:3,自引:0,他引:3
Wenhua Hai Mang Feng Xiwen Zhu Lei Shi Kelin Gao Ximing Fang Min Yan 《International Journal of Theoretical Physics》2000,39(6):1405-1411
We report exact solutions of the Poyatos–Cirac–Zoller quantum gate system withtwo trapped ions [Phys. Rev. Lett.
81, 1322 (1998)]. It is the superposition ofentangled states among the pure states of two harmonic oscillators and describesa mixed mode involving the center-of-mass and relative motions withcommensurable frequencies. Theoretical analysis of the exact solutions showsthat for a given trapping frequency the relative motion cannot be laser-cooled. 相似文献
46.
在相互作用表象中,研究了Lamb-Dicke区内单个超冷囚禁离子与一束驻 波型激光相互作用的动力学行为。由于没有引入旋转波近似,离子的运动随着Lamb-Dicke 参数η和Rabi频率Ω的增大趋向于混沌。所得结果与旋转波近似下的结果作了比较 。 相似文献
47.
Hong-Zheng Chen Mang Wang Shi-Lin Yang 《Journal of polymer science. Part A, Polymer chemistry》1997,35(1):91-95
A novel polymer with quasi-one-dimensional structure of 4,4′-diamino-diphenyl ether bridged polymeric silicon phthalocyanine ( I ) is synthesized by the condensation polymerization of 4,4′-diamino-diphenyl ether (DDE) monomer and dichloride silicon phthalocyanine (Cl2SiPc) monomer. The structure of the polymer ( I ) is identified by IR subtraction and UV/VIS spectroscopy and elemental analysis. The photoconductivity of the polymer I with quasi-one-dimensional structure is better than that of not only the parent Cl2SiPc reactant, but also other polymeric phthalocyanines without one-dimensional structures, and showing one-dimensional effect of molecular structure. © 1997 John Wiley & Sons, Inc. 相似文献
48.
Hong-Zheng Chen Mang Wang Shi-Lin Yang 《Journal of polymer science. Part A, Polymer chemistry》1997,35(5):959-963
The preparation of a novel polymer of ethylenediamine bridged polymeric silicon phthalocyanine ( I ) with quasi-one-dimensional structure is described. The product was obtained by the condensation polymerization of ethylenediamine and silicon dichloride phthalocyanine (Cl2SiPc) monomers and was characterized by IR and UV/VIS spectroscopy and elemental analysis. The photoconductivity of the polymer I with the quasi-one-dimensional structure is much better than that of not only the corresponding Cl2SiPc monomer, but also other phthalocyanine polymers whose molecules are not one-dimensional structures, and showing the one-dimensional effects of molecular structure of increasing photoconductivity. © 1997 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 35: 959–964, 1997 相似文献
49.
傅里叶变换利用红外光谱、粉末X射线衍射、微分热重分析、气相色谱-飞行时间质谱、紫外光谱、1H核磁滴定以及电喷雾质谱等分析手段对β-环糊精(β-CD)和亚砷酸钠(SA)形成的分子-离子加合物SA-β-CD进行详细表征.结果显示,主-客体之间分子-离子相互作用是导致SA-β-CD的谱学特性(在固态或在溶液中)与热分解行为相异于主、客体自身行为的重要原因.而在气相色谱-飞行时间质谱条件下发生的氧化还原反应以及在电喷雾质谱条件下出现的Na+-β-CD(摩尔比为1∶1)超分子离子复合体进一步揭示了这种分子-离子加合作用的复杂性与独特性. 相似文献
50.
Joo Yang Mang 《Journal of fluorine chemistry》2009,130(2):259-1161
The catalytic enantioselective electrophilic α-hydrazination promoted by chiral nickel complexes is described. Treatment of α-fluoro-β-ketoesters with azodicarboxylates as electrophilic amination reagents under mild reaction conditions afforded the corresponding α-amino α-fluoro-β-ketoesters with high yields (80-96%) and enantioselectivities (up to 78% ee). 相似文献