Quantum spin systerm in low dimensions has been one of the most attractive field in condensed matter physics for many decades . not only because of many meaningful properties of such systerms , but also in the field the existence of simplified models , which serve as paradigms for understanding and studying the role of strong interactions in many - electron systems 近年來,低維量子自旋系統(tǒng)一直是凝聚態(tài)物理學中最活躍的研究領域之一,不僅因為它自身的一些特殊性質,而且因為其中存在著許多簡化模型,能夠作為理解研究強關聯(lián)多電子系統(tǒng)的范例。