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arXiv 0905.1156cond-mat.str-el
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Z2拓扑序的宏观量子隧穿效应

Macroscopic Quantum Tunneling Effect of Z2 Topological Order

Jing Yu, Su-Peng Kou

摘要:

本文研究了Wen-Plaquette模型中Z2拓扑序的宏观量子隧穿效应。这类MQT的特点是不同的虚拟准粒子围绕环面运动的量子隧穿过程。利用高阶简并微扰方法,得到了简并基态的有效赝自旋模型。从这些模型出发,我们得到了基态的能量劈裂,其结果与精确对角化方法的结果一致

英文摘要:

In this paper, macroscopic quantum tunneling (MQT) effect of Z2 topological order in the Wen-Plaquette model is studied. This kind of MQT is characterized by quantum tunneling processes of different virtual quasi-particles moving around a torus. By a high-order degenerate perturbation approach, the effective pseudo-spin models of the degenerate ground states are obtained. From these models, we get the energy splitting of the ground states, of which the results are consistent with those from exact diagonalization method

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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