On the Reality of the Eigenvalues for a Class of -Symmetric Oscillators

On the Reality of the Eigenvalues for a Class of -Symmetric Oscillators
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关于一类对称振子特征值的真实性

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发表时间:
2002
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È þµ ½ Þ Ñ ½ · ¾ Þ Ñ ¾ · ¡ ¡ ¡ · Ñ ½ Þ Ûûøø Ðð
È þµ ½ Þ Ñ ½ · ¾ Þ Ñ ¾ · ¡ ¡ ¡ · Ñ ½ Þ Ûûøø Ðð
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Öö Þ ¾ ¦ ¾ Ñ·¾¸ûûûöö È ´þµ ½ Þ Ñ ½ · ¾ Þ Ñ ¾ · ¡ ¡ ¡ Öööð;Ôóðýòóñññð Òò;Ñ º;Ï Ôöóú;Øøøø Óö ×óññ ½ Ñ ¾ ¸ Û Ú ´ Μ ¼ Óö Ðð;È þµ ½ Þ Ñ ½ · ¾ Þ Ñ ¾ · ¡ ¡ ¡ · Ñ ½ Þ Ûûøø Ðð

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摘要 我们研究了边界条件下的特征值问题,当 z 沿射线趋于无穷大时,该特征值衰减为零,其中 是实多项式 和 。我们证明,如果对于某些我们有对于所有 ,那么特征值都是正实数。然后我们将其锐化为更大类别的多项式势。特别是,这意味着当 和 的边界条件为随着 z 沿正实轴和负实轴趋于无穷大时,势能的特征值均为正实数。这验证了Bessis和Zinn-Justin的猜想。
Abstract We study the eigenvalue problem with the boundary conditions that decays to zero as z tends to infinity along the rays , where is a real polynomial and . We prove that if for some we have for all , then the eigenvalues are all positive real. We then sharpen this to a larger class of polynomial potentials. In particular, this implies that the eigenvalues are all positive real for the potentials when with , and with the boundary conditions that decays to zero as z tends to infinity along the positive and negative real axes. This verifies a conjecture of Bessis and Zinn-Justin.