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1.
We obtain the energy spectrum and all the corresponding eigenfunctions of N-body Bose and Fermi systems with Quadratic Pair Potentials in one dimension. The original first excited state or energy level is disappeared in one dimension, which results from the operation of symmetry or antisymmetry of identical particles. In two and higher dimensions, we give the energy spectrum and the analytical ground state wave functions and the degree of degeneracy. By comparison, we refine Avinash Khare's results by making some items in his article precisely.  相似文献   
2.
Direct radiative capture processes are well described by a spherical potential model. Since most nuclei are not spherical, and in order for the model to explain direct radiative captures more accurately, the effect of nuclear deformation has been analyzed with q-deformed Woods-Saxon potential in this work. The results imply that nuclear deformation largely affects the direct radiative capture, and it should be taken into account when discussing direct capture reactions.  相似文献   
3.
范洪义  李学超 《物理学报》2012,61(20):77-82
在两粒子连续纠缠态表象|η〉的基础上分别导出了此纠缠态在坐标、动量表象和粒子数表象中的Schmidt分解,阐述了其物理意义.并且,用|η〉的Schmidt分解直接给出单模压缩算符对纠缠态的作用结果、双模平移算符的纠缠态表象以及平移算符在Fock空间的矩阵元.文章的讨论可以推广到多粒子连续纠缠态情形.  相似文献   
4.
李学超  杨阳  范洪义 《物理学报》2013,62(8):80301-080301
用有序算符内的积分技术, 推导了光场位相算符和逆算符的Weyl编序展开形式, 并利用该结果获得了相算符的经典对应以及某些新的特殊函数的生成函数和新的积分公式, 尤其是导出了带负次幂的复高斯积分的积分公式. 关键词: Weyl编序 位相算符 有序算符内的积分  相似文献   
5.
本文证明了下面的定理:若超图H=(X;E_1,E_2,…,E_m)中存在浓度为k长为m的圈,则有  相似文献   
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7.
采用双靶反应磁控溅射的方法,通过改变基体相对于靶材的位置制备了一系列不同化学成分的TiAlN薄膜.用SEM,AFM,EDS,XRD等检测手段对薄膜的表面状态,如粗糙度?化学成分及结构等进行了表征,采用UMT-3型多功能摩擦磨损试验机,在室温?大气环境?无润滑的条件下对不同成分TiAlN薄膜的摩擦学性能进行了评价.试验结果表明:薄膜的化学成分伴随着位置的改变在Ti 0.82Al 0.18N和Ti 0.12Al 0.88N的范围内发生变化;在经历了700℃×1h的退火以后不同位置制备的薄膜先后出现了TiN,Ti 2AlN,TiN 0.30AlN,TiAlN等多种物相结构;表面粗糙度和形貌的试验结果表明了不同薄膜在不同位置的生长方式也不同;x值在0.57及0.65的薄膜具有高硬度?低粗糙度,并在摩擦过程中形成了摩擦转移膜,从而导致薄膜具有最佳的摩擦学性能.  相似文献   
8.
Reaction and interaction cross sections of 17C on a carbon target have been re-analyzed using the modified Glauber model. The analysis with a deformed Woods-Saxon density/potential suggests a big deformation structure for 17C. The existence of a tail in the density distribution supports the possibility of it being a one-neutron halo structure. Under a deformed core plus a single-particle assumption, analysis shows a dominant d-wave of the valence neutron in 17C.  相似文献   
9.
李学超  王安民  王兆亮  杨阳 《中国物理 B》2012,21(8):87303-087303
The second-harmonic generation(SHG) coefficient in an asymmetric quantum dot(QD) with a static magnetic field is theoretically investigated.Within the framework of the effective-mass approximation,we obtain the confined wave functions and energies of electrons in the QD.We also obtain the SHG coefficient by the compact-density-matrix approach and the iterative method.The numerical results for the typical GaAs/AlGaAs QD show that the SHG coefficient depends strongly on the magnitude of magnetic field,parameters of the asymmetric potential and the radius of the QD.The resonant peak shifts with the magnetic field or the radius of the QD changing.  相似文献   
10.
李学超  谢传梅  范洪义 《中国物理 B》2012,21(8):80304-080304
By virtue of the entangled state representation(Hong-Yi Fan and J R Klauder 1994 Phys.Rev.A 49 704) and the two-mode squeezing operator’s natural representation(Hong-Yi Fan and Yue Fan 1996 Phys.Rev.A 54 958) we propose the squeeze-swapping mechanism which can generate quantum entanglement and new squeezed states of continuum variables.  相似文献   
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