摘要
本文利用计算机,计算核自旋量子数I≥5/2的两核情况下的15种体系的各种量子相干的数目、比值、总和以及它们的最高量子数;并给出上述15种体系的各种计算结果。 本文在计算机程序方面,采用最适化FORTRAN 77语言编制程序;并注意到U(iu)V(iv)=V(iv)U(iu)。使计算工作量几乎减少一半;同时,使用下标算法技巧,无需将密度矩阵存储于计算机中,从而大大提高了可计算密度矩阵的阶数。在CGWS、M—240D大型,计算机系统上,整个计算约需CPU时间2.34秒。 最后,本文给出关于量子相干计算的几个普遍公式。
In this paper, the number, ratio, total and highest quantum number of the quan-tum coherences, for 15 systems with two nuclei of nuclear--spin quantum numberI≥5/2 were computed by the computer. And the calculating results of the above-mentioned 15 systems were shown. On the program of computer, the optimum FORTRAN 77 language was used forthe programming. Based on U (iu )V(iv)≡V(iv)U(iu), the amount of work ofcomputation can be nearly decreased to a half. At the same time, by the techniqueof subscript--algorithm, the density matrix is not needed to store in the computer.Thereby the degree of density matrix, which may be computed, was increasedgreatly. On the system of CGWS M--240D computer, All computation needs CPUtime of 2.34s. At last, the six calculating formulas with universal senses for the quantum co-herences were further deduced. These formulas are applicable to the all quantum-numbers of nucleus spin.
出处
《量子电子学》
CSCD
1991年第4期467-471,共5页
关键词
核
自旋
量子相干
量子数
计算
large spin
quantum coherence
density matrix
optimum FORTRAN 77 language
subscript--algorithm
