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外磁场作用下双粒子体系的能级研究①

Wei-wei PEI,Hai-feng ZHAng,Ming-da LIU,Hai-shenN HAN

Journal of Jiamusi University(Natural Science Edition)（2019）

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Abstract
通过精确求解和微扰理论的方法给出了外磁场作用下双粒子体系的能级分布,研究结果表明在弱磁场条件下,总自旋S为守恒量, s1和s2则不守恒;在强磁场条件下, s1z , s2z , Sz均为守恒量;在一般情况下,仅Sz为守恒量, s1z , s2z及S2均不守恒, Sz相同而S不同的状态有可能发生耦合而形成能量本征态;在强磁场极限和弱磁场(以至无磁场)极限,均出现能级对Sz的简并.
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Key words
magnetic field,two-particle system,perturbation theory
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