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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
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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
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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
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Second-harmonic generation in asymmetric quantum dots in the presence of a static magnetic field 下载免费PDF全文
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
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Squeeze-swapping by Bell measurement studied in terms of the entangled state representation 下载免费PDF全文
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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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