Coherent state evolution in a Raman dispersion process

By using the technique of integration within an ordered product of operators, we derive the evolution of an initial coherent state in a Raman dispersion process.     

Light focusing in linear arranged symmetric nanoparticle trimer on metal film system

Benefiting from the induced image charge on film surface,the nanoparticle aggregating on metal exhibits interesting optical properties.In this work,a linear metal nanoparticle trimer on metal film system has been investigated to explore the novel optical phenomenon.Both the electric field and surface charge distributions demonstrate the light is focused on film greatly by the nanoparticles at two sides,which could be strongly modulated by the wavelength of incident light.And the influence of nanoparticle in middle on this light focusing ability has also been studied here,which is explained by the plasmon hybridization theory.Our finding about light focusing in nanoparticle aggregating on metal film not only enlarges the novel phenomenon of surface plasmon but also has great application prospect in the field of surface-enhanced spectra,surface catalysis,solar cells,water splitting,etc.     

光栅常数测定的一种方法

介绍了在光学平台上用激光器作为光源,测定光册常数的一种方法。该方法测量结果的精度与准确度与用分光计测量的结果相同,且现象明显,操作方法更简便,是一种较好的教学演示实验。     

引入Wigner函数,Weyl对应和Wigner算符相干态表象的新途径

用坐标、动量完备性的正规乘积内积分形式直接地引入了Wigner函数和Wigner算符的相干态表象,简洁地阐述了它与Weyl对应的关系。     

量子阻尼振子产生的压缩

用有序算符内的积分技术,求解一维量子阻尼振子的时间演化态.结果表明系统的时间演化态是压缩态.     

Normalized Excited Squeezed Vacuum State and Its Applications

By using the intermediate coordinate-momentum representation in quantum optics and generating function for the normalization of the excited squeezed vacuum state （ESVS）, the normalized ESVS is obtained. We find that its normalization constants obtained via two new methods are uniform and a new form which is different from the result obtained by Zhang and Fan [Phys. Lett. A 165 （1992） 14]. By virtue of the normalization constant of the ESVS and the intermediate coordinate-momentum representation, the tomogram of the normalized ESVS and some useful formulae are derived.     

p阶递推式的解公式之注

以文献[1]为基础，我们得到p阶循环方程式之解的一个间明公式，这不论是在理论上，还是实践方面，皆有一定的意义．