海森堡反铁磁体中双磁振子束缚态的命运
The Fate of the Two-Magnon Bound State in the Heisenberg Antiferromagnet
摘要：
用级数展开法计算了正方晶格上海森伯-伊辛反铁磁体中两磁振子束缚态的能谱。结果证实了Oguchi和Ishikawa早期的自旋波预测，即在达到各向同性海森堡极限之前，束缚态消失在连续介质中。
英文摘要：
The energy spectrum of the two-magnon bound states in the Heisenberg-Ising antiferromagnet on the square lattice are calculated using series expansion methods. The results confirm an earlier spin-wave prediction of Oguchi and Ishikawa, that the bound states vanish into the continuum before the isotropic Heisenberg limit is reached.
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