VARIATIONAL METHODS FOR MULTICHANNEL SCATTERING .2. NEW VARIANT OF OPTIMIZED ANOMALY-FREE METHOD AND RESTRICTED INTERPOLATED ANOMALY-FREE METHOD

被引:22
作者
NESBET, RK
机构
来源
PHYSICAL REVIEW A | 1978年 / 18卷 / 03期
关键词
D O I
10.1103/PhysRevA.18.955
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Several methods designed to avoid computational anomalies in the multichannel variational formalism of Kohn are considered. Two new methods are proposed. A new variant of the optimized anomaly-free method ensures that the computed K-matrix is symmetric. This method avoids spurious singularities but may give results that vary discontinuously with energy. A second new method, the restricted interpolated anomaly-free method, avoids both singularities and discontinuities, and produces a symmetric K matrix. Two-channel model calculations show that both new methods have accuracy comparable to the earlier anomaly-free and optimized anomaly-free methods. © 1978 The American Physical Society.
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页码:955 / 962
页数:8
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