Phase lag method

In 35 the numerical solution of the two-dimensional time-independent Schrodinger equation is studied using the method of partial discretization. The discretized problem is treated as a problem of the numerical solution of a system of ordinary differential equations and Numerov type methods are used to solve it. More specifically the classical Numerov method, the exponentially and trigonometrically fitting modified Numerov methods of Vanden Berghe el al. and the minimum phase-lag method of Rao et al. are applied to this problem. The methods are applied for the calculation of the eigenvalues of the two-dimensional harmonic oscillator and the two-dimensional Henon-Heils potential. The results are compared with the results produced by full discretization. Conclusions are presented. 

Phase Lag Method, The phase lag between a small sinusoidal perturbation (applied normally to the sanqjle surface) and the cantilever response is recorded. Tg is determined as the onset of change in the phase lag (15-17). 

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See also in sourсe #XX -- [ ]

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