Spurious singularities in the Schwinger variational method.
Spurious singularities in the Schwinger variational method.
复制标题
施温格变分法中的虚假奇点。
DOI:
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发表时间:
1990
期刊:
影响因子:
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通讯作者:
McKoy
中科院分区:
文献类型:
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作者:
Winstead;McKoy
We analyze a type of spurious resonance recently identified [see, for example, B. Apagyi, P. L'evay, and K. Lad'anyi, Phys. Rev. A 37, 4577 (1988)] in the Schwinger variational method. It is found that this type of anomaly is associated with ill conditioning of the potential matrix V, and that this fact allows the identification and removal of any such resonances by straightforward numerical procedures. We therefore anticipate that such anomalies will have little relevance to practical applications of the Schwinger method.