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arXiv 1605.03385cond-mat.stat-mech
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离散对称性与Lieb-Schultz-Mattis定理

Discrete symmetries and Lieb-Schultz-Mattis theorem

Takaichi Isoyama, Kiyohide Nomura

摘要:

在这项研究中,我们考虑一维量子自旋系统的平移和离散对称性(自旋反转,空间反转和时间反转对称性)。将连续U(1)对称性与离散对称性相结合,利用推广的Lieb-Schultz-Mattis定理\cite{Lieb-Schultz-Mattis-1961} \cite{Nomura-Morishige-Isoyama-2015},研究了对称性与基态、能谱之间的关系.对于半整数自旋的情况,我们使用离散对称性推广了二聚体和Néel概念,并且我们可以将LSM定理与二聚体或Néel态协调起来,因为存在一个微妙的困境。此外,一部分离散对称性足以对可能的相位进行分类。从而加深对LSM定理与离散对称性之间关系的理解。

英文摘要:

In this study, we consider one-dimension (1D) quantum spin systems with the translation and discrete symmetries (spin reversal, space inversion and time reversal symmetries). By combining the continuous U(1) symmetry with the discrete symmetries and using the extended Lieb-Schultz-Mattis theorem \cite{Lieb-Schultz-Mattis-1961}\cite{Nomura-Morishige-Isoyama-2015}, we investigate the relation between the ground states, energy spectra and symmetries. For half-integer spin cases, we generalize the dimer and Néel concepts using the discrete symmetries, and we can reconcile the LSM theorem with the dimer or Néel states, since there was a subtle dilemma. Furthermore, a part of discrete symmetries is enough to classify possible phases. Thus we can deepen our understanding of the relation between the LSM theorem and the discrete symmetries.

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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