Structure of the spectrum of infinite dimensional Hamiltonian operators

Structure of the spectrum of infinite dimensional Hamiltonian operators
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无限维哈密顿算子谱的结构

DOI:
10.1007/s11425-007-0187-0
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发表时间:
2008-04
期刊:
Science in China Series A: Mathematics
影响因子:
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通讯作者:
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中科院分区:
其他
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本文研究了无穷维Hamilton算子谱的结构。结果表明,谱、点谱和剩余谱的并谱以及连续谱都是关于复平面的虚轴对称的。证明了剩余谱不包含关于虚轴对称的点对,并给出了剩余谱的点谱刻画.作为这些结构结果的应用,我们得到了一类无穷维Hamilton算子剩余谱为空的几个充要条件。
This paper deals with the structure of the spectrum of infinite dimensional Hamiltonian operators. It is shown that the spectrum, the union of the point spectrum and residual spectrum, and the continuous spectrum are all symmetric with respect to the imaginary axis of the complex plane. Moreover, it is proved that the residual spectrum does not contain any pair of points symmetric with respect to the imaginary axis; and a complete characterization of the residual spectrum in terms of the point spectrum is then given. As applications of these structure results, we obtain several necessary and sufficient conditions for the residual spectrum of a class of infinite dimensional Hamiltonian operators to be empty.
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