...
首页> 外文期刊>Physical review >Phase diagram of the anisotropic spin-2 XXZ model: Infinite-system density matrix renormalization group study
【24h】

Phase diagram of the anisotropic spin-2 XXZ model: Infinite-system density matrix renormalization group study

机译:各向异性spin-2 XXZ模型的相图:无限系统密度矩阵重归一化组研究

获取原文
获取原文并翻译 | 示例
           

摘要

We study the ground-state phase diagram of the quantum spin-2 XXZ chain in the presence of on-site anisotropy using a matrix-product state based infinite-system density matrix renormalization group (IDMRG) algorithm. One of the interests in this system is in connecting the highly quantum-mechanical spin-1 phase diagram with the classical S = ∞ phase diagram. Several of the recent advances within DMRG make it possible to perform a detailed analysis of the whole phase diagram. We consider different types of on-site anisotropies, which allows us to establish the validity of the following statements: (1) the spin-2 model can be tuned into a phase, which is equivalent to the "topologically nontrivial" spin-1 Haldane phase, and (2) the spin-2 Haldane phase at the isotropic Heisenberg point is adiabatically connected to the "trivial" large-D phase, with a continuous change of the Hamiltonian parameters. Furthermore, we study the spin-3 XXZ chain to help explain the development of the classical phase diagram. We present details on how to use the iDMRG method to map out the phase diagram and include an extensive discussion of the numerical methods.
机译:我们使用基于矩阵乘积状态的无限系统密度矩阵重新归一化组(IDMRG)算法,研究了在存在各向异性的情况下量子自旋2 XXZ链的基态相图。该系统的兴趣之一是将高度量子力学的spin-1相图与经典S =∞相图相连接。 DMRG的一些最新进展使对整个相图进行详细分析成为可能。我们考虑了不同类型的现场各向异性,这使我们能够确定以下陈述的有效性:(1)spin-2模型可以调整为一个相,这相当于“拓扑上不重要的” spin-1 Haldane (2)在各向同性Heisenberg点处的自旋2的Haldane相绝热地连接到“平凡的”大D相,并且哈密顿量参数不断变化。此外,我们研究了spin-3 XXZ链,以帮助解释经典相图的发展。我们将介绍有关如何使用iDMRG方法绘制相图的详细信息,并包括对数值方法的广泛讨论。

著录项

  • 来源
    《Physical review》 |2013年第23期|235106.1-235106.16|共16页
  • 作者单位

    Department of Physics, University of California, Berkeley, California 94720, USA,Max-Planck-Institut fuer Physik komplexer Systeme, 01187 Dresden, Germany;

    Department of Physics, University of California, Berkeley, California 94720, USA;

    Department of Physics, University of California, Berkeley, California 94720, USA,Department of Physics, California Institute of Technology, Pasadena, California 91125, USA;

    Department of Physics, University of California, Berkeley, California 94720, USA,Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA;

    Max-Planck-Institut fuer Physik komplexer Systeme, 01187 Dresden, Germany;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    spin chain models;

    机译:自旋链模型;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号