arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1502.05049cond-mat.str-el
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具有手性相互作用的$Z_3$仲费米子链的Phase diagram

Phase diagram of the $Z_3$ Parafermionic Chain with Chiral Interactions

Ye Zhuang, Hitesh J. Changlani, Norm M. Tubman, Taylor L. Hughes

摘要:

仿费米子是具有非阿贝尔分数统计的奇异准粒子,可以在Kitaev p波线的推广的一维模型中实现和稳定。我们研究最简单的推广,即$Z_3$的parafermionic链。利用Jordan-Wigner变换,我们研究了等效的三态手征时钟模型,并利用密度矩阵重整化群技术研究了它的富相图。我们进行我们的分析,使用量子纠缠诊断,使我们能够确定相边界,和性质的相变。特别是,我们研究的拓扑和平凡的阶段之间的过渡,以及一个干预的无公度的阶段,出现在一个广泛的区域的相图。相图预测包含Lifshitz型过渡,我们确认使用纠缠措施。我们还试图定位和表征一个假定的三临界点在相图中,上述三个阶段满足在一个单一的点。

英文摘要:

Parafermions are exotic quasiparticles with non-Abelian fractional statistics that can be realized and stabilized in 1-dimensional models that are generalizations of the Kitaev p-wave wire. We study the simplest generalization, i.e. the $Z_3$ parafermionic chain. Using a Jordan-Wigner transform we focus on the equivalent three-state chiral clock model, and study its rich phase diagram using the density matrix renormalization group technique. We perform our analyses using quantum entanglement diagnostics which allow us to determine phase boundaries, and the nature of the phase transitions. In particular, we study the transition between the topological and trivial phases, as well as to an intervening incommensurate phase which appears in a wide region of the phase diagram. The phase diagram is predicted to contain a Lifshitz type transition which we confirm using entanglement measures. We also attempt to locate and characterize a putative tricritical point in the phase diagram where the three above mentioned phases meet at a single point.

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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