共查询到18条相似文献,搜索用时 146 毫秒
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针对<大学物理>2008年第8期上关于粒子概率密度算符和概率流密度算符的讨论一文进行了补充,对一般空间(如动量空间)中的概率和概率流进行了较系统的阐述,并纠正了该文中的有关错误论断. 相似文献
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以四参量族-广义边界条件代替有限深方势阱内粒子波函数的对数的一阶导数连续性条件,表明这种替换比用广义边界条件取代一盒子内自由粒子波函数在两壁处为零的边界条件显行更加合理些。我们发现,如对参量ρ和θ取任意值,则会导致概率流密度连续性被破坏。我们找到了约束ρ和θ取值的条件,并得到一组新的解析解。 相似文献
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在严格考虑泡利不相容原理的前提下,我们导出了任意单粒子哈密顿量的多粒子、多空穴能态密度的精确的、一般的公式.在半经典的Thomas-Fermi近似下,对于轴对称的谐振子,我们得出了一个计算形变核的能态密度的完全的解析表达式.由此,我们计算了g1p1h,g1p2h,g2p1h和g2p2h能态密度以及与此相应的能态密度的累计数N1p1h,N1p2h,N2p1h和N2p2h.并与三维球线性谐振子势的计算结果作了比较.结果表明,在中重核中,形变参数对能态密度的影响是很重要的. 相似文献
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通过引入一非幺正算符实现了对一维线性谐振子系统哈密顿量的从坐标、动量表象(Q,P)到占有数表象(a,a+)的改写. 相似文献
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首先介绍了Wigner函数的基本性质以及以Wigner函数为基础的相空间定态微扰理论,然后将其应用到一维无限深势阱和谐振子。 推导出一维无限深势阱所对应的Wigner函数,而且发现了存在于其纯态Wigner函数中奇特的压缩效应, 并利用不确定性关系给予了解释。同时计算出一维无限深势阱和谐振子在微扰的作用下,相应Wigner函数和能级的修正。 In this article, the qualities of Wigner function and the corresponding stationary perturbation theory are introduced and applied to one dimensional infinite potential well and one dimensional harmonic oscillator, and then the particular Wigner function of one dimensional infinite potential well is specified and a special constriction effect in its pure state Wigner function is discovered, to which, simultaneously, a detailed and reasonable explanation is elaborated from the perspective of uncertainty principle. Ultimately, the amendment of Wigner function and energy of one dimensional infinite potential well and one dimensional harmonic oscillator under perturbation are calculated according to stationary phase space perturbation theory. 相似文献
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Jeong-Ryeol Choi 《Pramana》2003,61(1):7-20
Taking advantage of dynamical invariant operator, we derived quantum mechanical solution of general time-dependent harmonic
oscillator. The uncertainty relation of the system is always larger than ħ/2 not only in number but also in the thermal state
as expected. We used the diagonal elements of density operator satisfying Leouville-von Neumann equation to calculate various
expectation values in the thermal state. We applied our theory to a special case which is the forced Caldirola-Kanai oscillator. 相似文献
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利用谐振子径向波函数的渐近行为和积分特性,导出了谐振子径向幂坐标矩阵元〈n′_rl′|r~k|n_rl〉的递推关系,从而把有关文献中关于对角元〈n_rl|r~k|n_rl〉的递推关系推广到更为一般的形式。 相似文献
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Paul Bracken 《Central European Journal of Physics》2008,6(1):135-140
An effective Hamiltonian for the generalized harmonic oscillator is determined by using squeezed state wavefunctions. The
equations of motion over an extended phase space are determined and then solved perturbatively for a specific choice of the
oscillator parameters. These results are used to calculate the dynamic and geometric phases for the generalized oscillator
with this choice of parameters.
相似文献
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《Physics letters. A》2019,383(24):2836-2838
In this letter we show that it is not possible to set up a canonical quantization for the damped harmonic oscillator using the Bateman Lagrangian. In particular, we prove that no square integrable vacuum exists for the natural ladder operators of the system, and that the only vacua can be found as distributions. This implies that the procedure proposed by some authors is only formally correct, and requires a much deeper analysis to be made rigorous. 相似文献
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通过SU(1,1)代数,找出了二维谐振子与加上反平方势微扰后的二维氢原子的能量对应关系 相似文献