多量子位Heisenberg模型中纠缠的时间演化特性

来源 :高能物理与核物理 | 被引量 : 0次 | 上传用户：slow1223rabbit

【摘要】

：

研究了多量子位Heisenberg模型中纠缠的时间演化特性,并给出了平均纠缠度《C》和多体纠缠度Q的解析表达式.结果发现无论是对《C》还是对Q,随着时间t的不断增长,它们均先线性

【作者】

：

田东平胡明亮

【机构】

：

西安邮电学院,西安交通大学理学院

【出处】

：

高能物理与核物理

【发表日期】

：

2004年期

【关键词】

：

Heisenberg模型多体纠缠次近邻相互作用 Heisenberg model multipartite entanglement next-neares

【基金项目】

：

陕西省自然科学基金;

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研究了多量子位Heisenberg模型中纠缠的时间演化特性,并给出了平均纠缠度《C》和多体纠缠度Q的解析表达式.结果发现无论是对《C》还是对Q,随着时间t的不断增长,它们均先线性的增大,而后达到一近似稳定状态,并绕一平衡值做无规则的上下震荡.若进一步考察N《C》则还可以发现,纠缠上下震荡的平衡值与Heisenberg链的长度几乎无关,而仅由它们的次近邻耦合常数J决定.

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多量子位Heisenberg模型中纠缠的时间演化特性

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