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无反射势阱的非齐次Schr(o)dinger方程的精确解 总被引:1,自引:0,他引:1
无反射势阱描述一种双原子分子的吸引势。将Rayleigh-Schrodinger展开法应用到微扰无反射势阱,得以一组非齐次Schrodinger方程。利用最近报道的微扰方法,导出这些方程的积分形式的精确解。以静电场与基态系统的相互作用为例,通过精确解的有界及其不能在Hilbert空间展开为有限项的性质,论证了该微扰系统束缚态的存在性及通常量子力学发散困难的起因。 相似文献
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非线性Schrodinger方程的守恒数值格式 总被引:9,自引:0,他引:9
对非线性Schrodinger方程提出了一种新的守恒差分格式,并证明了该格式的收性与稳定性。通过数值计算,对非线性Schrodinger方程中非线性项的离散进行了讨论,获得如下结论在取适当的参数后,所提出孤差分格式工上好于作为该格式特例的文(7)中的格式。 相似文献
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李介平 《原子与分子物理学报》1994,11(2):141-146
恒定外电场下,类氢原子的Schrodinger方程可在抛物座标下分离变量,然后求解。渐过波函数的几率振幅极小值定义了Stark能级,在弱电场情形,本文讨论了一种近似计算法。 相似文献
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计算了双光子Jaynes-Cummings模型场熵的演化,结合光子数统计分布和位相分布论证了双光子Jaynes-Cummings模型在强场情况和某些特定时刻存在“Schrodinger cat”态的迭加态。 相似文献
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提出了制备压缩相干态的叠回态,亦即类Schrodinger猫态的方案,该方案是基于强度依赖耦合的Jaynes-Cummings模型在远离共振极限下的时间演化而设计的。 相似文献
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我们在考虑原子扫射后,严格求解了二能级原子被共振激光驻波衍射的二维Schrodinger方程在此基础上,数值计算了原子通过驻波栅的衍射谱以及动量分布,求得了原子,特别是慢原子了,在激光波栅上的反射系数。 相似文献
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本文通过标度变换,引入t参量,将抛物坐标下分离变量后,稳定外电场下氢原子的Schrodinger方程消除了耦合,大大地简化了计算。由“有效动能”曲线给出“准稳态”存在的判据。利用波函数渐近表达式的周期性性质,可求出任意m值的氢原子能级随电场变化的解。本文以n=6时21条Stark分裂谱的E-F曲线为例,说明这种系统计算法的简便。最后通过边接出射波函数与其渐近形式,计算出散射振幅,分析了DC Sta 相似文献
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For a statically screened Coulomb-potential, two particle bound and resonant states are determined which correspond to complex poles of the S-matrix. The complex scaling method is used in order to calculate both the real eigenvalues of the Hamiltonian and the complex resonances in the same way. The eigenfunctions are described by complex power series; for the coefficients a recursion formula is given. 相似文献
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推广HF方程的微扰展开式,导出类氧离了的45个组态能级的递推公式,该公式适用于27≤Z≤92的类氧离子。 相似文献
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无限次微扰理论是求解无序体系格林函数的理论方法。此方法是吴式玉教授及其合作者们用“图式法”获得的。本文采用把矩阵分块,求解子矩阵方程的方法,推导了这一理论的结果,从而给出了这一理论的矩阵代数证明。
关键词: 相似文献
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本采用带有截断函数的极化势,为确定其中的可调参数,给出了一个经验公式:r↑-/r0=0.618。通过慢电子与亚稳态He(2^3S)弹性散射总截面的计算,表明本确定的极化势更准确地描述了慢电子与亚稳态He弹性散射的实际过程。 相似文献
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Hiroaki Hara 《Zeitschrift für Physik B Condensed Matter》1979,32(4):405-411
A general expression for a recursion formula which describes a random walk with coupled modes is given. In this system, the random walker is specified by the jumping probabilities P+ and P– which depend on the modes. The transition probability between the modes is expressed by a jumping probabilityR
(ij) (orr
ij). With the aid of this recursion formula, spatial structures of the steady state of a coupled random walk are studied. By introducing a Liapunov function and entropy, it is shown that the stability condition for the present system can be expressed as the principle of the extremum entropy production.On leave of absence from Tohoku University, Department of Applied Science, Faculty of Engineering, Sendai, 980 Japan. 相似文献
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The AFLT states |P〉Y1,Y2 has reflection symmetry, S^n|P〉Y1,Y2 = |- P〉Y2,Y2, nb =-2P, where S is the screening charge. AFLT state can be constructed using this reflect symmetry. We propose a recursion formula for this construction. The recursion formula is factorized completely. 相似文献
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Dongmin Gang Yu-tin Huang Eunkyung Koh Sangmin Lee Arthur E. Lipstein 《Journal of High Energy Physics》2011,2011(3):116
We propose a recursion relation for tree-level scattering amplitudes in three-dimensional Chern-Simons-matter theories. The recursion relation involves a complex deformation of momenta which generalizes the BCFW-deformation used in higher dimensions. Using background field methods, we show that all tree-level superamplitudes of the ABJM theory vanish for large deformations, establishing the validity of the recursion formula. Furthermore, we use the recursion relation to compute six-point and eight-point component amplitudes and match them with independent computations based on Feynman diagrams or the Grassmannian integral formula. As an application of the recursion relation, we prove that all tree-level amplitudes of the ABJM theory have dual superconformal symmetry. Using generalized unitarity methods, we extend this symmetry to the cut-constructible parts of the loop amplitudes. 相似文献