| 自旋S=1/2号反铁磁链的量子Monte Carlo研究 |
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| 引用本文： | 柏维.自旋S=1/2号反铁磁链的量子Monte Carlo研究[J].电子科技大学学报(社会科学版),1992(6). |
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| 作者姓名： | 柏维 |
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| 作者单位： | 电子科技大学应用物理系 成都610054 |
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| 摘 要： | 在投影量子Monte Carll方法基础上,提出了一种有效地处理反铁磁自旋长链的Monte Carlo方法。用该算法计算了自旋S=1/2、链长N=32的反铁磁链的基态能。计算结果与Betsuyaku和Bonner等人的结果相符合。同时,计算了反铁磁链的基态关联函数,得出了随链长N的增加,其自旋链的长程有序消失的结论。
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| 关 键 词： | 反铁磁自旋链 投影量子 Monte Carlo方法 基态关联函数 长程有序 基态能 |
QUANTUM MONTE CARLO STUDY OF ANTIFERROMAGNETIC CHAINS ON THE S=1/2 CASE |
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| Bai Wei.QUANTUM MONTE CARLO STUDY OF ANTIFERROMAGNETIC CHAINS ON THE S=1/2 CASE[J].Journal of University of Electronic Science and Technology of China(Social Sciences Edition),1992(6). |
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| Authors: | Bai Wei |
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| Abstract: | Based on the projector quantum Monte Carlo method, the paper presents an effective Monte Carlo arithmetic that processes the antiferromagnetic long chains. By using this arithmetic, the ground state ennrgy of the spin-1/2 antiferromagnetic chains with length N=32 is calculated, the result shows that the calculated value or the ground state energy is in good agreement with that obtained by Betsuyaku and Bonner et al. The ground state correlation functions of antiferromagnetic chains are also studied, and the result that Longrange-order disappears as chain length increases is obtained. |
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| Keywords: | antiferromagnetic spin chain projector quantum Monte Carlo method ground state correlation function Long-range-order ground state energy |
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